I seem to have found the formula for a good ship

My German battlecruiser design for 1911 really is good, if you don't mind all the guns forward (6-12in/50). I actually was able to give the ship 31 knots instead of the planned 30 knots. The armor is light, but what I had planned. The armor deck is 5in, so that helps the ship be well protected, along with the 2in A/T bulkhead. The deck is flush with a good freeboard. That always helps a ship.

Ger/CB/1911a1, Germany Battlecruiser laid down 1911

Displacement:
	27,553 t light; 28,528 t standard; 31,564 t normal; 33,993 t full load

Dimensions: Length overall / water x beam x draught
	752.00 ft / 750.00 ft x 100.00 ft x 30.00 ft (normal load)
	229.21 m / 228.60 m x 30.48 m  x 9.14 m

Armament:
      6 - 12.00" / 305 mm guns (3x2 guns), 864.00lbs / 391.90kg shells, 1911 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline, all forward, all raised mounts - superfiring
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1911 Model
	  Quick firing guns in deck mounts 
	  on side, evenly spread
	Weight of broadside 6,048 lbs / 2,743 kg
	Shells per gun, main battery: 100

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	6.00" / 152 mm	400.00 ft / 121.92 m	18.00 ft / 5.49 m
	Ends:	Unarmoured
	  Main Belt covers 82 % of normal length

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	8.00" / 203 mm	6.00" / 152 mm		8.00" / 203 mm
	2nd:	2.00" / 51 mm	      -			      -

   - Armour deck: 5.00" / 127 mm, Conning tower: 8.00" / 203 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 142,435 shp / 106,256 Kw = 31.00 kts
	Range 7,500nm at 15.00 kts
	Bunker at max displacement = 5,465 tons

Complement:
	1,183 - 1,539

Cost:
	£2.409 million / $9.635 million

Distribution of weights at normal displacement:
	Armament: 756 tons, 2.4 %
	Armour: 8,281 tons, 26.2 %
	   - Belts: 1,923 tons, 6.1 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 1,601 tons, 5.1 %
	   - Armour Deck: 4,585 tons, 14.5 %
	   - Conning Tower: 172 tons, 0.5 %
	Machinery: 5,781 tons, 18.3 %
	Hull, fittings & equipment: 12,735 tons, 40.3 %
	Fuel, ammunition & stores: 4,012 tons, 12.7 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  50,614 lbs / 22,958 Kg = 58.6 x 12.0 " / 305 mm shells or 4.0 torpedoes
	Stability (Unstable if below 1.00): 1.14
	Metacentric height 6.4 ft / 1.9 m
	Roll period: 16.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 81 %
			- Recoil effect (Restricted arc if above 1.00): 0.50
	Seaboat quality  (Average = 1.00): 1.62

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.491
	Length to Beam Ratio: 7.50 : 1
	'Natural speed' for length: 27.39 kts
	Power going to wave formation at top speed: 52 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -1.00 degrees
	Stern overhang: 2.00 ft / 0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		32.00 ft / 9.75 m
	   - Forecastle (20 %):	30.00 ft / 9.14 m
	   - Mid (0 %):		30.00 ft / 9.14 m
	   - Quarterdeck (15 %):	30.00 ft / 9.14 m
	   - Stern:		30.00 ft / 9.14 m
	   - Average freeboard:	30.16 ft / 9.19 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 78.0 %
		- Above water (accommodation/working, high = better): 239.4 %
	Waterplane Area: 49,565 Square feet or 4,605 Square metres
	Displacement factor (Displacement / loading): 122 %
	Structure weight / hull surface area: 168 lbs/sq ft or 820 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.93
		- Longitudinal: 1.98
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is excellent
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

My 1909 German scout design

My Ger/CS/1909 design was really a large destroyer, along the lines of what the Italians were doing. The ship had a good freeboard, three stacks, and 4-5in guns with 2-21in TT. I was able to make it work in Springsharp by reducing the speed to 31 knots and bloating the displacement considerably above 2400 tons. The ship was unarmored. It is only an good seaboat, when I reduced the speed (and machinery weight), which is somewhat disappointing.

Ger/CS/1909, Germany Scout laid down 1909 (Engine 1910)

Displacement:
	1,934 t light; 2,014 t standard; 2,261 t normal; 2,458 t full load

Dimensions: Length overall / water x beam x draught
	350.00 ft / 350.00 ft x 37.00 ft x 13.00 ft (normal load)
	106.68 m / 106.68 m x 11.28 m  x 3.96 m

Armament:
      4 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1909 Model
	  Quick firing guns in deck mounts 
	  on centreline, evenly spread, all raised mounts
	  Aft Main mounts separated by engine room
	Weight of broadside 250 lbs / 113 kg
	Shells per gun, main battery: 250
	2 - 21.0" / 533.4 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 2 shafts, 37,468 shp / 27,951 Kw = 31.00 kts
	Range 2,750nm at 15.00 kts
	Bunker at max displacement = 443 tons

Complement:
	163 - 213

Cost:
	£0.269 million / $1.075 million

Distribution of weights at normal displacement:
	Armament: 31 tons, 1.4 %
	Machinery: 1,249 tons, 55.2 %
	Hull, fittings & equipment: 654 tons, 28.9 %
	Fuel, ammunition & stores: 326 tons, 14.4 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  712 lbs / 323 Kg = 11.4 x 5.0 " / 127 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.65
	Metacentric height 2.6 ft / 0.8 m
	Roll period: 9.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 51 %
			- Recoil effect (Restricted arc if above 1.00): 0.13
	Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.470
	Length to Beam Ratio: 9.46 : 1
	'Natural speed' for length: 18.71 kts
	Power going to wave formation at top speed: 67 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -1.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		22.00 ft / 6.71 m
	   - Forecastle (21 %):	21.00 ft / 6.40 m
	   - Mid (34 %):		20.00 ft / 6.10 m (12.00 ft / 3.66 m aft of break)
	   - Quarterdeck (12 %):	12.00 ft / 3.66 m
	   - Stern:		12.00 ft / 3.66 m
	   - Average freeboard:	15.08 ft / 4.60 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 189.5 %
		- Above water (accommodation/working, high = better): 119.7 %
	Waterplane Area: 8,401 Square feet or 780 Square metres
	Displacement factor (Displacement / loading): 68 %
	Structure weight / hull surface area: 42 lbs/sq ft or 204 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.64
		- Longitudinal: 1.92
		- Overall: 0.72
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is adequate

The Ger/BB/1909A design is another good one

The Ger/BB/1909A design actually outperformed what I had calculated back in the the early 1970's. I was able to have about the same displacement and still have a 14in armor basis, with 25 knot speed. The armament is 9-12in guns in triple turrets: two forward and one aft. The secondary armament is too light, but what I had though adequate at the time: 8-6in QF. Too boot, it is a good seaboat. This is the report:

Ger/BB/1909A, Germany Enter ship type laid down 1909

Displacement:
	27,603 t light; 28,674 t standard; 31,587 t normal; 33,917 t full load

Dimensions: Length overall / water x beam x draught
	645.00 ft / 645.00 ft x 106.00 ft x 30.00 ft (normal load)
	196.60 m / 196.60 m x 32.31 m  x 9.14 m

Armament:
      9 - 12.00" / 305 mm guns (3x3 guns), 864.00lbs / 391.90kg shells, 1909 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline, evenly spread, all raised mounts
	  Aft Main mounts separated by engine room
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1909 Model
	  Quick firing guns in deck mounts 
	  on side, evenly spread, all raised mounts
	Weight of broadside 8,640 lbs / 3,919 kg
	Shells per gun, main battery: 90

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	14.0" / 356 mm	395.00 ft / 120.40 m	12.00 ft / 3.66 m
	Ends:	Unarmoured
	  Main Belt covers 94 % of normal length

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	14.0" / 356 mm	6.00" / 152 mm		14.0" / 356 mm
	2nd:	2.00" / 51 mm	      -			      -

   - Armour deck: 5.00" / 127 mm, Conning tower: 14.00" / 356 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 67,534 shp / 50,380 Kw = 25.00 kts
	Range 6,500nm at 15.00 kts
	Bunker at max displacement = 5,244 tons

Complement:
	1,184 - 1,540

Cost:
	£2.303 million / $9.212 million

Distribution of weights at normal displacement:
	Armament: 1,080 tons, 3.4 %
	Armour: 10,652 tons, 33.7 %
	   - Belts: 2,949 tons, 9.3 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 3,033 tons, 9.6 %
	   - Armour Deck: 4,368 tons, 13.8 %
	   - Conning Tower: 301 tons, 1.0 %
	Machinery: 3,070 tons, 9.7 %
	Hull, fittings & equipment: 12,801 tons, 40.5 %
	Fuel, ammunition & stores: 3,984 tons, 12.6 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  61,039 lbs / 27,687 Kg = 70.6 x 12.0 " / 305 mm shells or 5.7 torpedoes
	Stability (Unstable if below 1.00): 1.04
	Metacentric height 5.9 ft / 1.8 m
	Roll period: 18.4 seconds
	Steadiness	- As gun platform (Average = 50 %): 86 %
			- Recoil effect (Restricted arc if above 1.00): 0.66
	Seaboat quality  (Average = 1.00): 1.73

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.539
	Length to Beam Ratio: 6.08 : 1
	'Natural speed' for length: 25.40 kts
	Power going to wave formation at top speed: 49 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 0.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		31.00 ft / 9.45 m
	   - Forecastle (20 %):	30.00 ft / 9.14 m
	   - Mid (72 %):		30.00 ft / 9.14 m (20.00 ft / 6.10 m aft of break)
	   - Quarterdeck (15 %):	20.00 ft / 6.10 m
	   - Stern:		20.00 ft / 6.10 m
	   - Average freeboard:	27.28 ft / 8.31 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 57.9 %
		- Above water (accommodation/working, high = better): 212.7 %
	Waterplane Area: 47,226 Square feet or 4,387 Square metres
	Displacement factor (Displacement / loading): 124 %
	Structure weight / hull surface area: 188 lbs/sq ft or 920 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.91
		- Longitudinal: 2.28
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is excellent
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

My Ger/BB/1907 design really worked well

Aside from having to inflate the displacement, I received a glowing report from Springsharp about my Ger/BB/1907 design. The concept was for a well-armored ship with 8-12in guns and 24 knots speed. I had hoped for a normal displacement of 25,847 tons, but that was too low for Springsharp. The ship has a tripod foremast and two funnels. What I was able to do was:

Ger/BB/1907, Germany Battleship laid down 1907

Displacement:
	25,394 t light; 26,354 t standard; 29,548 t normal; 32,103 t full load

Dimensions: Length overall / water x beam x draught
	620.00 ft / 620.00 ft x 105.00 ft x 26.00 ft (normal load)
	188.98 m / 188.98 m x 32.00 m  x 7.92 m

Armament:
      8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1907 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline, evenly spread, all raised mounts
	  Aft Main mounts separated by engine room
      12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1907 Model
	  Quick firing guns in deck mounts 
	  on side, evenly spread, all raised mounts
	Weight of broadside 7,296 lbs / 3,309 kg
	Shells per gun, main battery: 90

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	13.0" / 330 mm	335.00 ft / 102.11 m	8.00 ft / 2.44 m
	Ends:	Unarmoured
	Upper:	7.00" / 178 mm	335.00 ft / 102.11 m	16.00 ft / 4.88 m
	  Main Belt covers 83 % of normal length

   - Torpedo Bulkhead:
		1.50" / 38 mm	335.00 ft / 102.11 m	26.00 ft / 7.92 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	13.0" / 330 mm	8.00" / 203 mm		10.0" / 254 mm
	2nd:	2.00" / 51 mm	      -			      -

   - Armour deck: 4.00" / 102 mm, Conning tower: 10.00" / 254 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 58,432 shp / 43,590 Kw = 24.00 kts
	Range 6,500nm at 15.00 kts
	Bunker at max displacement = 5,749 tons

Complement:
	1,126 - 1,464

Cost:
	£2.120 million / $8.479 million

Distribution of weights at normal displacement:
	Armament: 912 tons, 3.1 %
	Armour: 10,022 tons, 33.9 %
	   - Belts: 3,346 tons, 11.3 %
	   - Torpedo bulkhead: 483 tons, 1.6 %
	   - Armament: 2,428 tons, 8.2 %
	   - Armour Deck: 3,560 tons, 12.0 %
	   - Conning Tower: 206 tons, 0.7 %
	Machinery: 3,320 tons, 11.2 %
	Hull, fittings & equipment: 11,139 tons, 37.7 %
	Fuel, ammunition & stores: 4,154 tons, 14.1 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  56,772 lbs / 25,752 Kg = 65.7 x 12.0 " / 305 mm shells or 9.4 torpedoes
	Stability (Unstable if below 1.00): 1.13
	Metacentric height 6.8 ft / 2.1 m
	Roll period: 16.9 seconds
	Steadiness	- As gun platform (Average = 50 %): 76 %
			- Recoil effect (Restricted arc if above 1.00): 0.45
	Seaboat quality  (Average = 1.00): 1.53

Hull form characteristics:
	Hull has rise forward of midbreak, raised quarterdeck 
	Block coefficient: 0.611
	Length to Beam Ratio: 5.90 : 1
	'Natural speed' for length: 24.90 kts
	Power going to wave formation at top speed: 50 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -2.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		30.00 ft / 9.14 m
	   - Forecastle (20 %):	28.00 ft / 8.53 m
	   - Mid (76 %):		28.00 ft / 8.53 m (18.00 ft / 5.49 m aft of break)
	   - Quarterdeck (15 %):	18.00 ft / 5.49 m (0.00 ft / 0.00 m before break)
	   - Stern:		18.00 ft / 5.49 m
	   - Average freeboard:	24.95 ft / 7.60 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 74.5 %
		- Above water (accommodation/working, high = better): 206.4 %
	Waterplane Area: 48,104 Square feet or 4,469 Square metres
	Displacement factor (Displacement / loading): 123 %
	Structure weight / hull surface area: 171 lbs/sq ft or 833 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.94
		- Longitudinal: 1.78
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is excellent
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

My system for using Springsharp

Given that Springsharp is the most accessible and useful warship general design tool that I have seen (including my own, until I improve it, except for propulsion calculations), then we need to understand how to use it to get the desired results. I start by entering my initial set of specifications and generate a report. I generally do not look at the report, initially. Instead, I look at the Performance page. That will generally either like what you have (an unlikely occurance) or complain about something, usually hull strength. There are a number of things you will need to do. First, assure yourself that you have entered all the data needed, including freeboard, rounds per gun in the main armament, armor (if there is any), and the engine parameters, including boiler and engine. If you have deficient hull strength, the two main things you will have to do are to start reducing speed and increasing displacement. I recommend doing those incrementally, and not together, until you are at least viable. Decreasing speed has the greatest effect, due to machinery weight being a big issue. I usually end up with the ship underperforming for the displacement. I usually start reducing the block coefficient slider, until I can click into the situation where the Performance page declares the design to be balanced. If the seakeeping capability is deficient, you may be forced to increase freeboard and displacement, until you can resolve the issue. You may be able to affect the issue through reducing beam, which seems counterintuitive to me. You can also play with adjusting the stability-seakeeping slider. You may possibly be able to get some benefit from this. I have had not had much luck with it.

German destroyer design: Ger/DD/1905

My German destroyer design that I intended to build in numbers came out larger and slower than I wanted. What I wanted was an 870 ton, 32-knot vessel. Instead, to work, I had to drastically reduce the speed and increase the displacement.

Ger/DD/1905, Germany Destroyer laid down 1905 (Engine 1906)

Displacement:
	915 t light; 945 t standard; 1,081 t normal; 1,189 t full load

Dimensions: Length overall / water x beam x draught
	270.70 ft / 270.00 ft x 28.00 ft x 9.00 ft (normal load)
	82.51 m / 82.30 m x 8.53 m  x 2.74 m

Armament:
      2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
	  Quick firing guns in deck mounts 
	  on centreline, evenly spread, all raised mounts
	Weight of broadside 64 lbs / 29 kg
	Shells per gun, main battery: 250
	2 - 18.0" / 457.2 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 2 shafts, 21,567 shp / 16,089 Kw = 29.00 kts
	Range 1,800nm at 15.00 kts
	Bunker at max displacement = 244 tons

Complement:
	93 - 122

Cost:
	£0.130 million / $0.520 million

Distribution of weights at normal displacement:
	Armament: 8 tons, 0.7 %
	Machinery: 652 tons, 60.3 %
	Hull, fittings & equipment: 254 tons, 23.5 %
	Fuel, ammunition & stores: 166 tons, 15.4 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  257 lbs / 116 Kg = 8.0 x 4.0 " / 102 mm shells or 0.2 torpedoes
	Stability (Unstable if below 1.00): 1.66
	Metacentric height 1.7 ft / 0.5 m
	Roll period: 9.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 56 %
			- Recoil effect (Restricted arc if above 1.00): 0.09
	Seaboat quality  (Average = 1.00): 1.11

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.556
	Length to Beam Ratio: 9.64 : 1
	'Natural speed' for length: 16.43 kts
	Power going to wave formation at top speed: 71 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		20.00 ft / 6.10 m
	   - Forecastle (20 %):	19.00 ft / 5.79 m
	   - Mid (29 %):		19.00 ft / 5.79 m (12.00 ft / 3.66 m aft of break)
	   - Quarterdeck (15 %):	12.00 ft / 3.66 m
	   - Stern:		12.00 ft / 3.66 m
	   - Average freeboard:	14.11 ft / 4.30 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 200.6 %
		- Above water (accommodation/working, high = better): 122.1 %
	Waterplane Area: 5,306 Square feet or 493 Square metres
	Displacement factor (Displacement / loading): 38 %
	Structure weight / hull surface area: 23 lbs/sq ft or 111 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.44
		- Longitudinal: 2.50
		- Overall: 0.53
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is excellent

My German destroyer minelayer design: Ger/DM/1913

I was only able to make what was intended to be a fast German minelayer work by reducing the speed to 32 knots. I guess that wasn't bad for 1913, but I had wanted 35 knots. The ship was to carry 3-6in guns and 250 mines. I allowed weights for mines, although I did not have good mine weight information, in a quick search.

Ger/DM/1913, Germany Destroyer minelayer laid down 1913

Displacement:
	1,902 t light; 1,959 t standard; 2,097 t normal; 2,207 t full load

Dimensions: Length overall / water x beam x draught
	350.73 ft / 350.00 ft x 36.00 ft x 13.00 ft (normal load)
	106.90 m / 106.68 m x 10.97 m  x 3.96 m

Armament:
      3 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1913 Model
	  Quick firing guns in deck mounts 
	  on centreline, evenly spread, all raised mounts
	  Aft Main mounts separated by engine room
	Weight of broadside 324 lbs / 147 kg
	Shells per gun, main battery: 80

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 2 shafts, 40,163 shp / 29,961 Kw = 32.00 kts
	Range 1,800nm at 15.00 kts
	Bunker at max displacement = 249 tons

Complement:
	154 - 201

Cost:
	£0.284 million / $1.135 million

Distribution of weights at normal displacement:
	Armament: 41 tons, 1.9 %
	Machinery: 1,139 tons, 54.3 %
	Hull, fittings & equipment: 535 tons, 25.5 %
	Fuel, ammunition & stores: 194 tons, 9.3 %
	Miscellaneous weights: 188 tons, 8.9 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  455 lbs / 207 Kg = 4.2 x 6.0 " / 152 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.37
	Metacentric height 1.9 ft / 0.6 m
	Roll period: 11.1 seconds
	Steadiness	- As gun platform (Average = 50 %): 51 %
			- Recoil effect (Restricted arc if above 1.00): 0.23
	Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.448
	Length to Beam Ratio: 9.72 : 1
	'Natural speed' for length: 18.71 kts
	Power going to wave formation at top speed: 67 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		21.00 ft / 6.40 m
	   - Forecastle (20 %):	20.00 ft / 6.10 m
	   - Mid (32 %):		20.00 ft / 6.10 m (13.00 ft / 3.96 m aft of break)
	   - Quarterdeck (15 %):	13.00 ft / 3.96 m
	   - Stern:		13.00 ft / 3.96 m
	   - Average freeboard:	15.32 ft / 4.67 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 198.9 %
		- Above water (accommodation/working, high = better): 141.8 %
	Waterplane Area: 8,024 Square feet or 745 Square metres
	Displacement factor (Displacement / loading): 57 %
	Structure weight / hull surface area: 34 lbs/sq ft or 167 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.51
		- Longitudinal: 1.79
		- Overall: 0.57
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is excellent

Something to look for if your design "doesn't work"

If you design is not working in Springsharp, you may have neglected to fill in some critical piece. That is especially true if your design is relatively conservative. I just tried the larger German 1915 destroyer with 6-23.4in torpedo tubes, and had a "hard time". I thought it should be able to make 35 knots, but I would have to grow the displacement too much for that to be feasible. I had to settle for 34 knots. This is intended to be a "super destroyer", but it is not very "super".

Ger/DL/1915b1, Germany Destroyer laid down 1916

Displacement:
	2,304 t light; 2,389 t standard; 2,525 t normal; 2,633 t full load

Dimensions: Length overall / water x beam x draught
	390.84 ft / 390.00 ft x 40.00 ft x 12.00 ft (normal load)
	119.13 m / 118.87 m x 12.19 m  x 3.66 m

Armament:
      4 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1916 Model
	  Breech loading guns in deck mounts 
	  on centreline, evenly spread, all raised mounts
	  Aft Main mounts separated by engine room
	Weight of broadside 250 lbs / 113 kg
	Shells per gun, main battery: 250
	6 - 23.4" / 594.36 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 2 shafts, 55,969 shp / 41,753 Kw = 34.00 kts
	Range 1,750nm at 15.00 kts
	Bunker at max displacement = 243 tons

Complement:
	177 - 231

Cost:
	£0.537 million / $2.148 million

Distribution of weights at normal displacement:
	Armament: 31 tons, 1.2 %
	Machinery: 1,580 tons, 62.6 %
	Hull, fittings & equipment: 693 tons, 27.4 %
	Fuel, ammunition & stores: 220 tons, 8.7 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  597 lbs / 271 Kg = 9.6 x 5.0 " / 127 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.68
	Metacentric height 3.0 ft / 0.9 m
	Roll period: 9.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 51 %
			- Recoil effect (Restricted arc if above 1.00): 0.11
	Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.472
	Length to Beam Ratio: 9.75 : 1
	'Natural speed' for length: 19.75 kts
	Power going to wave formation at top speed: 68 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		24.00 ft / 7.32 m
	   - Forecastle (20 %):	20.00 ft / 6.10 m
	   - Mid (41 %):		20.00 ft / 6.10 m (14.00 ft / 4.27 m aft of break)
	   - Quarterdeck (15 %):	14.00 ft / 4.27 m
	   - Stern:		14.00 ft / 4.27 m
	   - Average freeboard:	16.78 ft / 5.11 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 211.8 %
		- Above water (accommodation/working, high = better): 116.7 %
	Waterplane Area: 10,138 Square feet or 942 Square metres
	Displacement factor (Displacement / loading): 57 %
	Structure weight / hull surface area: 37 lbs/sq ft or 181 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.52
		- Longitudinal: 1.63
		- Overall: 0.58
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is adequate

One of my very fast British battlecruiser design studies

I am starting to understand how to get designs to "work" in Springsharp. I was able to get my 38 knot British battlecruiser of circa 1914 to get the "Design well balanced for a battleship or cruiser" performance designation. This is a "light battlecruiser" with 4-13.5in guns and I added 12-5.5in QF, as I had not showed a secondary armament in my sketch from "way back". If you are ready to greatly increase displacement, you can get most things to "work", even a ship as extreme as this. The report complains about seakeeping ability, however. That is something that is harder to achieve. This is the Springsharp report:

GB/CB/high speed a1, Great Britain Battlecruiser laid down 1914

Displacement:
	38,236 t light; 39,478 t standard; 41,732 t normal; 43,535 t full load

Dimensions: Length overall / water x beam x draught
	851.19 ft / 850.00 ft x 95.00 ft x 28.00 ft (normal load)
	259.44 m / 259.08 m x 28.96 m  x 8.53 m

Armament:
      4 - 13.50" / 343 mm guns (2x2 guns), 1,230.19lbs / 558.00kg shells, 1914 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline, evenly spread, all raised mounts
      12 - 5.50" / 140 mm guns (5 mounts), 83.19lbs / 37.73kg shells, 1914 Model
	  Quick firing guns in deck mounts 
	  on side, evenly spread, all raised mounts
	Weight of broadside 5,919 lbs / 2,685 kg
	Shells per gun, main battery: 120

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	6.00" / 152 mm	465.00 ft / 141.73 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 84 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
		1.50" / 38 mm	465.00 ft / 141.73 m	27.00 ft / 8.23 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	9.00" / 229 mm	6.00" / 152 mm		8.00" / 203 mm
	2nd:	1.00" / 25 mm	      -			      -

   - Armour deck: 3.00" / 76 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 6 shafts, 386,340 shp / 288,210 Kw = 38.00 kts
	Range 5,000nm at 15.00 kts
	Bunker at max displacement = 4,057 tons

Complement:
	1,459 - 1,897

Cost:
	£5.146 million / $20.584 million

Distribution of weights at normal displacement:
	Armament: 740 tons, 1.8 %
	Armour: 7,320 tons, 17.5 %
	   - Belts: 1,946 tons, 4.7 %
	   - Torpedo bulkhead: 697 tons, 1.7 %
	   - Armament: 1,257 tons, 3.0 %
	   - Armour Deck: 3,421 tons, 8.2 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 14,882 tons, 35.7 %
	Hull, fittings & equipment: 15,294 tons, 36.6 %
	Fuel, ammunition & stores: 3,495 tons, 8.4 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  32,934 lbs / 14,939 Kg = 26.8 x 13.5 " / 343 mm shells or 3.2 torpedoes
	Stability (Unstable if below 1.00): 1.30
	Metacentric height 7.4 ft / 2.3 m
	Roll period: 14.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 45 %
			- Recoil effect (Restricted arc if above 1.00): 0.36
	Seaboat quality  (Average = 1.00): 0.81

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.646
	Length to Beam Ratio: 8.95 : 1
	'Natural speed' for length: 29.15 kts
	Power going to wave formation at top speed: 62 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: -1.00 ft / -0.30 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		34.00 ft / 10.36 m
	   - Forecastle (18 %):	32.00 ft / 9.75 m
	   - Mid (75 %):		32.00 ft / 9.75 m (22.00 ft / 6.71 m aft of break)
	   - Quarterdeck (18 %):	22.00 ft / 6.71 m
	   - Stern:		22.00 ft / 6.71 m
	   - Average freeboard:	29.64 ft / 9.03 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 163.5 %
		- Above water (accommodation/working, high = better): 248.2 %
	Waterplane Area: 61,633 Square feet or 5,726 Square metres
	Displacement factor (Displacement / loading): 97 %
	Structure weight / hull surface area: 167 lbs/sq ft or 817 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.99
		- Longitudinal: 1.16
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is excellent
	Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Another design study: Ger/CB/1915b1

By somewhat inflating my early 1970's design study for a 1915 German battlecruiser, I was able to achieve something good. The original intent was for a normal displacement of 37,500 tons. I can only guess at the protection, but I seem to have less than my original study. I had to settle for 32 knots rather than 36 knots, as well. My drawing is of a ship with three stacks and a tripod foremast with a large top, and a platform for a director. The mainmast is also a tripod.

Ger/CB/1915b1, Germany Battlecruiser laid down 1915

Displacement:
	35,643 t light; 37,371 t standard; 40,398 t normal; 42,820 t full load

Dimensions: Length overall / water x beam x draught
	787.50 ft / 787.50 ft x 98.00 ft x 31.00 ft (normal load)
	240.03 m / 240.03 m x 29.87 m  x 9.45 m

Armament:
      6 - 16.00" / 406 mm guns (3x2 guns), 2,048.00lbs / 928.96kg shells, 1915 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline, evenly spread, all raised mounts
	  Aft Main mounts separated by engine room
      12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
	  Quick firing guns in deck mounts 
	  on side, all forward, all raised mounts - superfiring
	Weight of broadside 13,584 lbs / 6,162 kg
	Shells per gun, main battery: 120

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	9.00" / 229 mm	450.00 ft / 137.16 m	10.00 ft / 3.05 m
	Ends:	4.00" / 102 mm	265.00 ft / 80.77 m	10.00 ft / 3.05 m
	  72.50 ft / 22.10 m Unarmoured ends
	Upper:	6.00" / 152 mm	450.00 ft / 137.16 m	8.00 ft / 2.44 m
	  Main Belt covers 88 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	10.0" / 254 mm	8.00" / 203 mm		10.0" / 254 mm
	2nd:	2.00" / 51 mm	      -			      -

   - Armour deck: 3.50" / 89 mm, Conning tower: 12.00" / 305 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 4 shafts, 191,368 shp / 142,760 Kw = 32.00 kts
	Range 7,500nm at 15.00 kts
	Bunker at max displacement = 5,449 tons

Complement:
	1,424 - 1,852

Cost:
	£5.365 million / $21.461 million

Distribution of weights at normal displacement:
	Armament: 1,698 tons, 4.2 %
	Armour: 9,809 tons, 24.3 %
	   - Belts: 3,108 tons, 7.7 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 2,772 tons, 6.9 %
	   - Armour Deck: 3,624 tons, 9.0 %
	   - Conning Tower: 304 tons, 0.8 %
	Machinery: 7,249 tons, 17.9 %
	Hull, fittings & equipment: 16,887 tons, 41.8 %
	Fuel, ammunition & stores: 4,755 tons, 11.8 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  48,894 lbs / 22,178 Kg = 23.9 x 16.0 " / 406 mm shells or 3.3 torpedoes
	Stability (Unstable if below 1.00): 1.04
	Metacentric height 5.2 ft / 1.6 m
	Roll period: 18.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 56 %
			- Recoil effect (Restricted arc if above 1.00): 0.98
	Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.591
	Length to Beam Ratio: 8.04 : 1
	'Natural speed' for length: 28.06 kts
	Power going to wave formation at top speed: 55 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -1.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		32.00 ft / 9.75 m
	   - Forecastle (18 %):	30.00 ft / 9.14 m
	   - Mid (76 %):		30.00 ft / 9.14 m (20.00 ft / 6.10 m aft of break)
	   - Quarterdeck (18 %):	20.00 ft / 6.10 m
	   - Stern:		20.00 ft / 6.10 m
	   - Average freeboard:	27.74 ft / 8.46 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 90.4 %
		- Above water (accommodation/working, high = better): 217.1 %
	Waterplane Area: 55,971 Square feet or 5,200 Square metres
	Displacement factor (Displacement / loading): 107 %
	Structure weight / hull surface area: 203 lbs/sq ft or 989 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.54
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is adequate
	Room for accommodation and workspaces is excellent

The "Super Lion"

I just took another try at the "Super Lion" battlecruiser described in The World Crisis, Vol.1. This is rather speculative, but I think it captures Admiral Fisher's intent. The size is much greater than he would have liked (36,420 tons normal). Nonetheless, I am pleased with the result.

GB/CB/Super Lion, Great Britain Battlecruiser laid down 1912

Displacement:
	34,788 t light; 36,420 t standard; 36,420 t normal; 36,420 t full load

Dimensions: Length overall / water x beam x draught
	795.00 ft / 795.00 ft x 95.00 ft x 29.00 ft (normal load)
	242.32 m / 242.32 m x 28.96 m  x 8.84 m

Armament:
      10 - 15.00" / 381 mm guns (5x2 guns), 1,687.50lbs / 765.44kg shells, 1912 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline, evenly spread, all raised mounts
	  Main guns limited to end-on fire
      16 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1912 Model
	  Quick firing guns in casemate mounts 
	  on side ends, evenly spread, all raised mounts - superfiring
	Weight of broadside 17,875 lbs / 8,108 kg
	Shells per gun, main battery: 90

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	9.00" / 229 mm	  0.00 ft / 0.00 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 0 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	9.00" / 229 mm	6.00" / 152 mm		9.00" / 229 mm
	2nd:	3.00" / 76 mm	3.00" / 76 mm		2.00" / 51 mm

   - Armour deck: 3.00" / 76 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 177,449 shp / 132,377 Kw = 32.00 kts
	Range 6,500nm at 0.00 kts
	Bunker at max displacement = 0 tons

Complement:
	1,317 - 1,713

Cost:
	£4.085 million / $16.340 million

Distribution of weights at normal displacement:
	Armament: 2,234 tons, 6.1 %
	Armour: 7,420 tons, 20.4 %
	   - Belts: 506 tons, 1.4 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 3,899 tons, 10.7 %
	   - Armour Deck: 3,014 tons, 8.3 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 7,075 tons, 19.4 %
	Hull, fittings & equipment: 18,059 tons, 49.6 %
	Fuel, ammunition & stores: 1,632 tons, 4.5 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  27,212 lbs / 12,343 Kg = 16.1 x 15.0 " / 381 mm shells or 1.9 torpedoes
	Stability (Unstable if below 1.00): 0.94
	Metacentric height 4.0 ft / 1.2 m
	Roll period: 19.9 seconds
	Steadiness	- As gun platform (Average = 50 %): 54 %
			- Recoil effect (Restricted arc if above 1.00): 1.68
	Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.582
	Length to Beam Ratio: 8.37 : 1
	'Natural speed' for length: 28.20 kts
	Power going to wave formation at top speed: 54 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -1.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		31.00 ft / 9.45 m
	   - Forecastle (18 %):	30.00 ft / 9.14 m
	   - Mid (85 %):		30.00 ft / 9.14 m (20.00 ft / 6.10 m aft of break)
	   - Quarterdeck (18 %):	20.00 ft / 6.10 m
	   - Stern:		20.00 ft / 6.10 m
	   - Average freeboard:	28.57 ft / 8.71 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 108.5 %
		- Above water (accommodation/working, high = better): 238.7 %
	Waterplane Area: 54,315 Square feet or 5,046 Square metres
	Displacement factor (Displacement / loading): 92 %
	Structure weight / hull surface area: 221 lbs/sq ft or 1,080 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.41
		- Overall: 1.00
	Caution: Poor stability - excessive risk of capsizing
	Hull space for machinery, storage, compartmentation is adequate
	Room for accommodation and workspaces is excellent

Another design study: Ger/DL/1915

I drew the profile for the Ger/DL/1915, and fell in love with it. The design is a classic DL type. The size is small by later standards, but is not unusual for the Great War. The main compromises were that I had to reduce the speed from 35 knots to 34 knots, and increase the normal displacement. The "Performance" says: "Design well balanced for a light fast combatant". The report complains about the seakeeping ability, however. My drawing actually looks German, which was unusual for me. This is the Springsharp report:

Ger/DL/1915, Germany Destroyer leader laid down 1915

Displacement:
	1,701 t light; 1,739 t standard; 1,904 t normal; 2,036 t full load

Dimensions: Length overall / water x beam x draught
	332.80 ft / 332.00 ft x 32.00 ft x 12.70 ft (normal load)
	101.44 m / 101.19 m x 9.75 m  x 3.87 m

Armament:
      5 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1915 Model
	  Breech loading guns in deck mounts 
	  on centreline, evenly spread, all raised mounts
	Weight of broadside 313 lbs / 142 kg
	Shells per gun, main battery: 0
	4 - 23.6" / 599.44 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 2 shafts, 51,634 shp / 38,519 Kw = 34.00 kts
	Range 2,500nm at 15.00 kts
	Bunker at max displacement = 297 tons

Complement:
	143 - 187

Cost:
	£0.378 million / $1.510 million

Distribution of weights at normal displacement:
	Armament: 39 tons, 2.1 %
	Machinery: 1,194 tons, 62.7 %
	Hull, fittings & equipment: 468 tons, 24.6 %
	Fuel, ammunition & stores: 203 tons, 10.7 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  344 lbs / 156 Kg = 5.5 x 5.0 " / 127 mm shells or 0.2 torpedoes
	Stability (Unstable if below 1.00): 1.59
	Metacentric height 2.0 ft / 0.6 m
	Roll period: 9.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 50 %
			- Recoil effect (Restricted arc if above 1.00): 0.30
	Seaboat quality  (Average = 1.00): 0.96

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.494
	Length to Beam Ratio: 10.38 : 1
	'Natural speed' for length: 18.22 kts
	Power going to wave formation at top speed: 72 %
	Trim (Max stability = 0, Max steadiness = 100): 52
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		23.00 ft / 7.01 m
	   - Forecastle (18 %):	21.00 ft / 6.40 m
	   - Mid (33 %):		21.00 ft / 6.40 m (13.00 ft / 3.96 m aft of break)
	   - Quarterdeck (18 %):	13.00 ft / 3.96 m
	   - Stern:		13.00 ft / 3.96 m
	   - Average freeboard:	15.78 ft / 4.81 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 216.2 %
		- Above water (accommodation/working, high = better): 94.0 %
	Waterplane Area: 7,040 Square feet or 654 Square metres
	Displacement factor (Displacement / loading): 45 %
	Structure weight / hull surface area: 30 lbs/sq ft or 146 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.44
		- Longitudinal: 2.40
		- Overall: 0.52
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is adequate
	Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

One of my design studies: Ger/CB/1915a1

One of my many design studies (one of the more extreme) was for a 900ft long battlecruiser with 9-16.5in guns and a 40 knot speed. The speed seems to be not practical (that should be obvious), but I was able to get 34 knots with Springsharp. The planned load displacement was 40,000 tons, but I had to grow the design to work. This was a design with two triple turrets forward and the secondary battery on the sides:

Ger/CB/1915a1, Germany Battlecruiser laid down 1915
Armoured gunboat

Displacement:
	38,617 t light; 40,325 t standard; 43,773 t normal; 46,532 t full load

Dimensions: Length overall / water x beam x draught
	900.58 ft / 900.00 ft x 100.00 ft x 29.00 ft (normal load)
	274.50 m / 274.32 m x 30.48 m  x 8.84 m

Armament:
      6 - 16.50" / 419 mm guns (2x3 guns), 2,246.06lbs / 1,018.80kg shells, 1915 Model
	  Breech loading guns in turrets (on barbettes)
	  on bow with limited arc, all raised mounts
	  Main guns limited to end-on fire
      12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
	  Quick firing guns in deck mounts 
	  on side, evenly spread, all raised mounts
	Weight of broadside 14,772 lbs / 6,701 kg
	Shells per gun, main battery: 100

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	4.00" / 102 mm	500.00 ft / 152.40 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 85 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	9.00" / 229 mm	6.00" / 152 mm		9.00" / 229 mm
	2nd:	2.00" / 51 mm	      -			      -

   - Armour deck: 3.00" / 76 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 4 shafts, 240,309 shp / 179,270 Kw = 34.00 kts
	Range 8,000nm at 15.00 kts
	Bunker at max displacement = 6,208 tons

Complement:
	1,513 - 1,967

Cost:
	£6.076 million / $24.303 million

Distribution of weights at normal displacement:
	Armament: 1,847 tons, 4.2 %
	Armour: 7,270 tons, 16.6 %
	   - Belts: 1,387 tons, 3.2 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 2,274 tons, 5.2 %
	   - Armour Deck: 3,609 tons, 8.2 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 9,103 tons, 20.8 %
	Hull, fittings & equipment: 20,398 tons, 46.6 %
	Fuel, ammunition & stores: 5,157 tons, 11.8 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  53,683 lbs / 24,350 Kg = 23.9 x 16.5 " / 419 mm shells or 3.2 torpedoes
	Stability (Unstable if below 1.00): 1.10
	Metacentric height 6.0 ft / 1.8 m
	Roll period: 17.1 seconds
	Steadiness	- As gun platform (Average = 50 %): 62 %
			- Recoil effect (Restricted arc if above 1.00): 1.02
	Seaboat quality  (Average = 1.00): 1.24

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.587
	Length to Beam Ratio: 9.00 : 1
	'Natural speed' for length: 30.00 kts
	Power going to wave formation at top speed: 53 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 1.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		33.00 ft / 10.06 m
	   - Forecastle (18 %):	32.00 ft / 9.75 m
	   - Mid (75 %):		32.00 ft / 9.75 m (25.00 ft / 7.62 m aft of break)
	   - Quarterdeck (18 %):	25.00 ft / 7.62 m
	   - Stern:		25.00 ft / 7.62 m
	   - Average freeboard:	30.32 ft / 9.24 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 99.2 %
		- Above water (accommodation/working, high = better): 255.4 %
	Waterplane Area: 65,029 Square feet or 6,041 Square metres
	Displacement factor (Displacement / loading): 109 %
	Structure weight / hull surface area: 211 lbs/sq ft or 1,029 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.34
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is adequate
	Room for accommodation and workspaces is excellent
	Good seaboat, rides out heavy weather easily

Warning: Limited arc turret/barbette not allowed - Main battery

I am really finding "Springsharp" to be interesting and useful

Springsharp has inherited the Springstyle approach, but Springsharp is good enough and easy enough to use that I find that I can live with it, even though I would not choose to do it the way they do. What I do differently in my warship design program is that I don't freeze the displacement and start subtracting weight from the hull structure as features are added. Instead, I let the displacement increase as features are added, and show the results with respect to displacement, draft, speed, and stability.

My design study for a British "1921" battlecruiser

I guess I should be happy that my British 1921 battlecruiser design study turned out as well as it did. The idea was to have a 48,000 ton ships with a speed of 30 knots, with 9-16in guns, a 14in belt and turrets, and strong deck armor. I was able to go to a 5in deck, so that was good. I had to grow the ship to do everything I wanted, but it wasn't excessive, unlike some times. Springsharp complains that the ship is not good enough for its size.

GB/CB/1921a1, Great Britain Battlecruiser laid down 1921

Displacement:
	46,469 t light; 48,612 t standard; 51,761 t normal; 54,281 t full load

Dimensions: Length overall / water x beam x draught
	856.12 ft / 855.00 ft x 105.00 ft x 33.30 ft (normal load)
	260.94 m / 260.60 m x 32.00 m  x 10.15 m

Armament:
     9 - 16.00" / 406 mm guns (3x3 guns), 2,048.00lbs / 928.96kg shells, 1921 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, majority forward, all raised mounts - superfiring
	  Main guns limited to end-on fire
     20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1921 Model
	  Quick firing guns in turrets (on barbettes)
	  on side, evenly spread, all raised mounts
	Weight of broadside 19,682 lbs / 8,928 kg
	Shells per gun, main battery: 100

Armour:
  - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	14.0" / 356 mm	440.00 ft / 134.11 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 79 % of normal length

  - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	14.0" / 356 mm	9.00" / 229 mm		14.0" / 356 mm
	2nd:	3.00" / 76 mm	2.00" / 51 mm		2.00" / 51 mm

  - Armour deck: 5.00" / 127 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 168,135 shp / 125,429 Kw = 30.00 kts
	Range 8,000nm at 15.00 kts
	Bunker at max displacement = 5,669 tons

Complement:
	1,715 - 2,230

Cost:
	£11.464 million / $45.855 million

Distribution of weights at normal displacement:
	Armament: 2,460 tons, 4.8 %
	Armour: 15,663 tons, 30.3 %
	   - Belts: 4,398 tons, 8.5 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 5,157 tons, 10.0 %
	   - Armour Deck: 6,108 tons, 11.8 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 5,790 tons, 11.2 %
	Hull, fittings & equipment: 22,556 tons, 43.6 %
	Fuel, ammunition & stores: 5,292 tons, 10.2 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  64,960 lbs / 29,465 Kg = 31.7 x 16.0 " / 406 mm shells or 4.1 torpedoes
	Stability (Unstable if below 1.00): 0.97
	Metacentric height 5.0 ft / 1.5 m
	Roll period: 19.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 67 %
			- Recoil effect (Restricted arc if above 1.00): 1.31
	Seaboat quality  (Average = 1.00): 1.39

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.606
	Length to Beam Ratio: 8.14 : 1
	'Natural speed' for length: 29.24 kts
	Power going to wave formation at top speed: 50 %
	Trim (Max stability = 0, Max steadiness = 100): 48
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: -1.00 ft / -0.30 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		32.00 ft / 9.75 m
	   - Forecastle (20 %):	30.00 ft / 9.14 m
	   - Mid (0 %):		30.00 ft / 9.14 m
	   - Quarterdeck (15 %):	30.00 ft / 9.14 m
	   - Stern:		30.00 ft / 9.14 m
	   - Average freeboard:	30.16 ft / 9.19 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 72.5 %
		- Above water (accommodation/working, high = better): 220.0 %
	Waterplane Area: 66,029 Square feet or 6,134 Square metres
	Displacement factor (Displacement / loading): 110 %
	Structure weight / hull surface area: 229 lbs/sq ft or 1,119 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.52
		- Overall: 1.01
	Caution: Poor stability - excessive risk of capsizing
	Hull space for machinery, storage, compartmentation is excellent
	Room for accommodation and workspaces is excellent
	Good seaboat, rides out heavy weather easily

I just tried my Ger/CB/1906 design

I should have known that my design for a very fast battlecruiser that was moderately well-armed and lightly armored would have to change. The original concept was for a ship 800ft x 85ft x 25.6ft with a 25,000 ton displacement and a speed of 33 knots. I was fortunate to salvage a 30 knot speed by going very large. If you don't mind too large a ship, it makes for a good ship:

Ger/CB/1906, Germany Battlecruiser laid down 1906

Displacement:
	26,324 t light; 27,335 t standard; 29,992 t normal; 32,117 t full load

Dimensions: Length overall / water x beam x draught
	800.00 ft / 800.00 ft x 85.00 ft x 25.60 ft (normal load)
	243.84 m / 243.84 m x 25.91 m  x 7.80 m

Armament:
      8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1906 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, evenly spread, all raised mounts - superfiring
      12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1906 Model
	  Quick firing guns in deck mounts 
	  on side ends, evenly spread, all raised mounts - superfiring
	Weight of broadside 7,296 lbs / 3,309 kg
	Shells per gun, main battery: 100

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	4.00" / 102 mm	425.00 ft / 129.54 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 82 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	6.00" / 152 mm	6.00" / 152 mm		6.00" / 152 mm
	2nd:	1.00" / 25 mm	      -			      -

   - Armour deck: 3.00" / 76 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 121,371 shp / 90,542 Kw = 30.00 kts
	Range 5,000nm at 15.00 kts
	Bunker at max displacement = 4,782 tons

Complement:
	1,139 - 1,481

Cost:
	£2.791 million / $11.163 million

Distribution of weights at normal displacement:
	Armament: 912 tons, 3.0 %

I had to scale back my expections for the Ger/CB/1905

I designed a light battlecruiser for the Germans in 1905 (the Ger/CB/1905). I had to settle for increasing the displacement above the planned 19,000 tons and reduced the speed from the planned 31 knots. This is what we are left with. It actually didn't turn out so badly, although I really wanted a higher speed, considering the sacrifice of guns and armor.

Ger/CB/1905, Germany Battlecruiser laid down 1905

Displacement:
	17,405 t light; 18,068 t standard; 20,028 t normal; 21,596 t full load

Dimensions: Length overall / water x beam x draught
	700.00 ft / 700.00 ft x 80.00 ft x 24.40 ft (normal load)
	213.36 m / 213.36 m x 24.38 m  x 7.44 m

Armament:
      4 - 12.00" / 305 mm guns in single mounts, 864.00lbs / 391.90kg shells, 1905 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, evenly spread, all raised mounts - superfiring
      12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
	  Quick firing guns in casemate mounts 
	  on side ends, evenly spread, all raised mounts - superfiring
	Weight of broadside 3,840 lbs / 1,742 kg
	Shells per gun, main battery: 120

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	4.00" / 102 mm	375.00 ft / 114.30 m	8.00 ft / 2.44 m
	Ends:	Unarmoured
	Upper:	3.00" / 76 mm	375.00 ft / 114.30 m	0.00 ft / 0.00 m
	  Main Belt covers 82 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	9.00" / 229 mm	4.00" / 102 mm		4.00" / 102 mm
	2nd:	2.00" / 51 mm	1.00" / 25 mm		      -

   - Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 73,568 shp / 54,882 Kw = 28.00 kts
	Range 4,500nm at 15.00 kts
	Bunker at max displacement = 3,528 tons

Complement:
	841 - 1,094

Cost:
	£1.793 million / $7.171 million

Distribution of weights at normal displacement:
	Armament: 480 tons, 2.4 %
	Armour: 3,404 tons, 17.0 %
	   - Belts: 524 tons, 2.6 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 641 tons, 3.2 %
	   - Armour Deck: 2,096 tons, 10.5 %
	   - Conning Tower: 143 tons, 0.7 %
	Machinery: 5,573 tons, 27.8 %
	Hull, fittings & equipment: 7,947 tons, 39.7 %
	Fuel, ammunition & stores: 2,623 tons, 13.1 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  21,711 lbs / 9,848 Kg = 25.1 x 12.0 " / 305 mm shells or 2.0 torpedoes
	Stability (Unstable if below 1.00): 1.19
	Metacentric height 5.0 ft / 1.5 m
	Roll period: 15.1 seconds
	Steadiness	- As gun platform (Average = 50 %): 92 %
			- Recoil effect (Restricted arc if above 1.00): 0.62
	Seaboat quality  (Average = 1.00): 1.73

Hull form characteristics:
	Hull has raised forecastle, rise forward of midbreak
	Block coefficient: 0.513
	Length to Beam Ratio: 8.75 : 1
	'Natural speed' for length: 26.46 kts
	Power going to wave formation at top speed: 47 %
	Trim (Max stability = 0, Max steadiness = 100): 53
	Bow angle (Positive = bow angles forward): -1.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		32.00 ft / 9.75 m
	   - Forecastle (20 %):	28.00 ft / 8.53 m (27.00 ft / 8.23 m aft of break)
	   - Mid (70 %):		27.00 ft / 8.23 m (18.00 ft / 5.49 m aft of break)
	   - Quarterdeck (15 %):	18.00 ft / 5.49 m
	   - Stern:		18.00 ft / 5.49 m
	   - Average freeboard:	24.82 ft / 7.57 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 108.7 %
		- Above water (accommodation/working, high = better): 213.1 %
	Waterplane Area: 37,758 Square feet or 3,508 Square metres
	Displacement factor (Displacement / loading): 109 %
	Structure weight / hull surface area: 137 lbs/sq ft or 667 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.41
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is adequate
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

My design for the Ger/BB/1905 worked extremely well

I was shocked at how well my German battleship design worked in Springsharp. I actually was able to increase the speed to 24 knots (from 23). I used my traditional displacement and dimensions, as they had always been:

Ger/BB/1905, Enter country Enter ship type laid down 1905

Displacement:
	19,135 t light; 19,986 t standard; 22,058 t normal; 23,715 t full load

Dimensions: Length overall / water x beam x draught
	580.00 ft / 580.00 ft x 90.00 ft x 26.60 ft (normal load)
	176.78 m / 176.78 m x 27.43 m  x 8.11 m

Armament:
      8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1905 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, evenly spread, all raised mounts - superfiring
      12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
	  Breech loading guns in casemate mounts 
	  on side ends, evenly spread, all raised mounts - superfiring
	Weight of broadside 7,296 lbs / 3,309 kg
	Shells per gun, main battery: 100

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	10.0" / 254 mm	385.00 ft / 117.35 m	8.00 ft / 2.44 m
	Ends:	Unarmoured
	Upper:	7.00" / 178 mm	385.00 ft / 117.35 m	0.00 ft / 0.00 m
	  Main Belt covers 102 % of normal length

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	11.0" / 279 mm	7.00" / 178 mm		11.0" / 279 mm
	2nd:	2.00" / 51 mm	      -			      -

   - Armour deck: 3.00" / 76 mm, Conning tower: 11.00" / 279 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 47,841 shp / 35,690 Kw = 24.00 kts
	Range 4,500nm at 15.00 kts
	Bunker at max displacement = 3,728 tons

Complement:
	904 - 1,176

Cost:
	£1.943 million / $7.773 million

Distribution of weights at normal displacement:
	Armament: 912 tons, 4.1 %
	Armour: 5,630 tons, 25.5 %
	   - Belts: 1,336 tons, 6.1 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 2,074 tons, 9.4 %
	   - Armour Deck: 2,033 tons, 9.2 %
	   - Conning Tower: 186 tons, 0.8 %
	Machinery: 3,624 tons, 16.4 %
	Hull, fittings & equipment: 8,969 tons, 40.7 %
	Fuel, ammunition & stores: 2,923 tons, 13.3 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  28,036 lbs / 12,717 Kg = 32.4 x 12.0 " / 305 mm shells or 2.9 torpedoes
	Stability (Unstable if below 1.00): 1.05
	Metacentric height 4.7 ft / 1.4 m
	Roll period: 17.5 seconds
	Steadiness	- As gun platform (Average = 50 %): 73 %
			- Recoil effect (Restricted arc if above 1.00): 0.75
	Seaboat quality  (Average = 1.00): 1.45

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.556
	Length to Beam Ratio: 6.44 : 1
	'Natural speed' for length: 24.08 kts
	Power going to wave formation at top speed: 49 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -2.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		25.00 ft / 7.62 m
	   - Forecastle (20 %):	24.00 ft / 7.32 m
	   - Mid (80 %):		24.00 ft / 7.32 m (15.00 ft / 4.57 m aft of break)
	   - Quarterdeck (15 %):	15.00 ft / 4.57 m
	   - Stern:		15.00 ft / 4.57 m
	   - Average freeboard:	22.28 ft / 6.79 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 84.7 %
		- Above water (accommodation/working, high = better): 179.9 %
	Waterplane Area: 36,635 Square feet or 3,404 Square metres
	Displacement factor (Displacement / loading): 109 %
	Structure weight / hull surface area: 171 lbs/sq ft or 833 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.94
		- Longitudinal: 1.81
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is adequate
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Good seaboat, rides out heavy weather easily

What we need now is a program for building 3D ship models

If you can design your own ships, the next thing we need is a program so that we can conveniently build 3D ship models, working at an abstraction level above the 3D modeling level. We don't want to have to bother with the details of 3D modeling, but would like to enter specs, and perhaps drag and drop components. There would need to be a way to specify new components, and perhaps doing a little "lofting", and that would be it. I would guess that this would not be a trivial effort. The only good thing about it is that the components would be limited. It is not like we are trying to build a general-purpose 3D modeling tool, useful for all things.

The GB/DD/1906 destroyer design

Cliff's destroyer design, which he intended to mass-produce, works pretty well in Springsharp, except for being a bad seaboat. I'm not sure what to do, without some pretty drastic action. The "Performance" tab characterizes the design as "Design well balanced for a light fast combatant". This is the report:

GB/DD/1906, Great Britain Destroyer laid down 1906 (Engine 1908)

Displacement:
	774 t light; 795 t standard; 868 t normal; 927 t full load

Dimensions: Length overall / water x beam x draught
	266.66 ft / 265.00 ft x 27.00 ft x 9.00 ft (normal load)
	81.28 m / 80.77 m x 8.23 m  x 2.74 m

Armament:
      2 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1906 Model
	  Quick firing guns in deck mounts 
	  on centreline ends, evenly spread, all raised mounts
	Weight of broadside 42 lbs / 19 kg
	Shells per gun, main battery: 150
	2 - 21.0" / 533.4 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 2 shafts, 27,577 shp / 20,572 Kw = 32.00 kts
	Range 1,250nm at 15.00 kts
	Bunker at max displacement = 132 tons
	  Caution: Delicate, lightweight machinery

Complement:
	79 - 103

Cost:
	£0.105 million / $0.420 million

Distribution of weights at normal displacement:
	Armament: 5 tons, 0.6 %
	Machinery: 525 tons, 60.5 %
	Hull, fittings & equipment: 244 tons, 28.1 %
	Fuel, ammunition & stores: 94 tons, 10.9 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  208 lbs / 94 Kg = 10.0 x 3.5 " / 88 mm shells or 0.2 torpedoes
	Stability (Unstable if below 1.00): 1.53
	Metacentric height 1.4 ft / 0.4 m
	Roll period: 9.4 seconds
	Steadiness	- As gun platform (Average = 50 %): 45 %
			- Recoil effect (Restricted arc if above 1.00): 0.07
	Seaboat quality  (Average = 1.00): 0.82

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.472
	Length to Beam Ratio: 9.81 : 1
	'Natural speed' for length: 16.28 kts
	Power going to wave formation at top speed: 73 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 1.00 ft / 0.30 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		19.00 ft / 5.79 m
	   - Forecastle (20 %):	18.00 ft / 5.49 m
	   - Mid (30 %):		12.00 ft / 3.66 m
	   - Quarterdeck (15 %):	12.00 ft / 3.66 m
	   - Stern:		12.00 ft / 3.66 m
	   - Average freeboard:	13.58 ft / 4.14 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 199.6 %
		- Above water (accommodation/working, high = better): 112.8 %
	Waterplane Area: 4,650 Square feet or 432 Square metres
	Displacement factor (Displacement / loading): 31 %
	Structure weight / hull surface area: 24 lbs/sq ft or 116 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.44
		- Longitudinal: 2.93
		- Overall: 0.53
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is adequate
	Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

I redid my Ger/CS/1905 design

Given what I learned about Springsharp, I redid my design for the Ger/CS/1905 scout cruiser. By reducing the speed way down to 30 knots, I was able to use my original dimensions and give them the 2in Belt over the machinery spaces. I had thought that I would have to accept 29 knots, but 30 knots is not so bad, given the date of the design. Admittedly, I wanted to have too light a machinery for 1905, although I don't think that what I want is out of line. This is the Springsharp report:

Ger/CS/1905, Germany CL laid down 1905 (Engine 1908)

Displacement:
	2,150 t light; 2,213 t standard; 2,475 t normal; 2,685 t full load

Dimensions: Length overall / water x beam x draught
	372.76 ft / 370.00 ft x 38.00 ft x 13.00 ft (normal load)
	113.62 m / 112.78 m x 11.58 m  x 3.96 m

Armament:
      5 - 4.00" / 102 mm guns (3 mounts), 32.00lbs / 14.51kg shells, 1905 Model
	  Quick firing guns in deck mounts 
	  on centreline ends, majority forward, all raised mounts - superfiring
	Weight of broadside 160 lbs / 73 kg
	Shells per gun, main battery: 150
	2 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	2.00" / 51 mm	165.00 ft / 50.29 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 69 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	1.00" / 25 mm	      -			      -

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 2 shafts, 33,411 shp / 24,925 Kw = 30.00 kts
	Range 2,500nm at 15.00 kts
	Bunker at max displacement = 472 tons

Complement:
	175 - 228

Cost:
	£0.283 million / $1.131 million

Distribution of weights at normal displacement:
	Armament: 20 tons, 0.8 %
	Armour: 246 tons, 9.9 %
	   - Belts: 235 tons, 9.5 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 11 tons, 0.4 %
	   - Armour Deck: 0 tons, 0.0 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 1,363 tons, 55.0 %
	Hull, fittings & equipment: 522 tons, 21.1 %
	Fuel, ammunition & stores: 325 tons, 13.1 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  614 lbs / 279 Kg = 19.2 x 4.0 " / 102 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.58
	Metacentric height 2.5 ft / 0.8 m
	Roll period: 10.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 88 %
			- Recoil effect (Restricted arc if above 1.00): 0.12
	Seaboat quality  (Average = 1.00): 1.52

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.474
	Length to Beam Ratio: 9.74 : 1
	'Natural speed' for length: 19.24 kts
	Power going to wave formation at top speed: 63 %
	Trim (Max stability = 0, Max steadiness = 100): 58
	Bow angle (Positive = bow angles forward): 3.00 degrees
	Stern overhang: 1.50 ft / 0.46 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		24.00 ft / 7.32 m
	   - Forecastle (20 %):	23.00 ft / 7.01 m
	   - Mid (33 %):		22.00 ft / 6.71 m (14.00 ft / 4.27 m aft of break)
	   - Quarterdeck (15 %):	14.00 ft / 4.27 m
	   - Stern:		15.00 ft / 4.57 m
	   - Average freeboard:	17.06 ft / 5.20 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 183.9 %
		- Above water (accommodation/working, high = better): 141.1 %
	Waterplane Area: 9,153 Square feet or 850 Square metres
	Displacement factor (Displacement / loading): 65 %
	Structure weight / hull surface area: 29 lbs/sq ft or 139 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.44
		- Longitudinal: 1.67
		- Overall: 0.50
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The GB/DL/1906 design

I must admit to being disappointed at what Springsharp had to say about my friend Cliff's fast destroyer leader from 1906. To get a good rating, I had to reduce the speed from 35 knots to 31 knots. Even then, Springsharp was complaining about the compartmentation being cramped. This is sort of an odd ship, in the the guns are 4-88mm. Cliff's idea was that if the 88mm gun was good in land warfare, it should be as good in naval warfare. Hence, the GB/DL/1906 had 88's. This is the report for the ship:

GB/DL/1906, Great Britain Destroyer Leader laid down 1906 (Engine 1907)

Displacement:
	1,231 t light; 1,271 t standard; 1,392 t normal; 1,488 t full load

Dimensions: Length overall / water x beam x draught
	326.00 ft / 326.00 ft x 30.00 ft x 10.00 ft (normal load)
	99.36 m / 99.36 m x 9.14 m  x 3.05 m

Armament:
      4 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1906 Model
	  Quick firing guns in deck mounts 
	  on centreline, evenly spread, all raised mounts
	  Aft Main mounts separated by engine room
	Weight of broadside 83 lbs / 38 kg
	Shells per gun, main battery: 250
	2 - 21.0" / 533.4 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 2 shafts, 28,482 shp / 21,248 Kw = 31.00 kts
	Range 1,500nm at 15.00 kts
	Bunker at max displacement = 218 tons

Complement:
	113 - 148

Cost:
	£0.173 million / $0.691 million

Distribution of weights at normal displacement:
	Armament: 10 tons, 0.7 %
	Machinery: 864 tons, 62.1 %
	Hull, fittings & equipment: 357 tons, 25.6 %
	Fuel, ammunition & stores: 160 tons, 11.5 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  320 lbs / 145 Kg = 15.4 x 3.5 " / 88 mm shells or 0.2 torpedoes
	Stability (Unstable if below 1.00): 1.63
	Metacentric height 1.9 ft / 0.6 m
	Roll period: 9.2 seconds
	Steadiness	- As gun platform (Average = 50 %): 60 %
			- Recoil effect (Restricted arc if above 1.00): 0.10
	Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.498
	Length to Beam Ratio: 10.87 : 1
	'Natural speed' for length: 18.06 kts
	Power going to wave formation at top speed: 67 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 0.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		20.00 ft / 6.10 m
	   - Forecastle (20 %):	19.00 ft / 5.79 m
	   - Mid (34 %):		18.00 ft / 5.49 m (12.00 ft / 3.66 m aft of break)
	   - Quarterdeck (15 %):	12.00 ft / 3.66 m
	   - Stern:		12.00 ft / 3.66 m
	   - Average freeboard:	14.39 ft / 4.39 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 206.3 %
		- Above water (accommodation/working, high = better): 126.2 %
	Waterplane Area: 6,504 Square feet or 604 Square metres
	Displacement factor (Displacement / loading): 42 %
	Structure weight / hull surface area: 26 lbs/sq ft or 128 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.48
		- Longitudinal: 1.90
		- Overall: 0.55
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is excellent
	Good seaboat, rides out heavy weather easily

To get the GB/CB/1905 up to the originally intended speed, the design had to be greatly inflated

I decided to see what it would take to get the GB/CB/1905 battlecruiser design up to at least 31 knots. The goal was to get the coveted "Design well balanced for a battleship or cruiser" rating. To do that, I had to inflate the displacement to 30,290 tons normal displacement. The standard displacement doesn't look so bad: 27,124 tons. This is the report, which has all the relevant details:

GB/CB/1905a2, Great Britain Battlecruiser laid down 1905 (Engine 1906)

Displacement:
	26,518 t light; 27,124 t standard; 30,290 t normal; 32,823 t full load

Dimensions: Length overall / water x beam x draught
	770.00 ft / 770.00 ft x 85.00 ft x 26.00 ft (normal load)
	234.70 m / 234.70 m x 25.91 m  x 7.92 m

Armament:
      4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1905 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, evenly spread, all raised mounts
      9 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1905 Model
	  Quick firing guns in deck mounts 
	  on side, evenly spread, all raised mounts
	Weight of broadside 4,428 lbs / 2,009 kg
	Shells per gun, main battery: 0

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	4.00" / 102 mm	460.00 ft / 140.21 m	20.00 ft / 6.10 m
	Ends:	Unarmoured
	  Main Belt covers 92 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
		1.50" / 38 mm	460.00 ft / 140.21 m	25.00 ft / 7.62 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	10.0" / 254 mm	6.00" / 152 mm		8.00" / 203 mm
	2nd:	2.00" / 51 mm	      -			      -

   - Armour deck: 2.00" / 51 mm, Conning tower: 10.00" / 254 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 142,369 shp / 106,207 Kw = 31.00 kts
	Range 6,000nm at 15.00 kts
	Bunker at max displacement = 5,700 tons

Complement:
	1,147 - 1,492

Cost:
	£2.687 million / $10.749 million

Distribution of weights at normal displacement:
	Armament: 554 tons, 1.8 %
	Armour: 5,256 tons, 17.4 %
	   - Belts: 1,576 tons, 5.2 %
	   - Torpedo bulkhead: 638 tons, 2.1 %
	   - Armament: 1,023 tons, 3.4 %
	   - Armour Deck: 1,809 tons, 6.0 %
	   - Conning Tower: 209 tons, 0.7 %
	Machinery: 9,245 tons, 30.5 %
	Hull, fittings & equipment: 11,463 tons, 37.8 %
	Fuel, ammunition & stores: 3,772 tons, 12.5 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  32,682 lbs / 14,824 Kg = 37.8 x 12.0 " / 305 mm shells or 3.3 torpedoes
	Stability (Unstable if below 1.00): 1.21
	Metacentric height 5.6 ft / 1.7 m
	Roll period: 15.1 seconds
	Steadiness	- As gun platform (Average = 50 %): 81 %
			- Recoil effect (Restricted arc if above 1.00): 0.59
	Seaboat quality  (Average = 1.00): 1.62

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.623
	Length to Beam Ratio: 9.06 : 1
	'Natural speed' for length: 27.75 kts
	Power going to wave formation at top speed: 53 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -1.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		35.00 ft / 10.67 m
	   - Forecastle (20 %):	33.00 ft / 10.06 m
	   - Mid (81 %):		32.00 ft / 9.75 m (20.00 ft / 6.10 m aft of break)
	   - Quarterdeck (15 %):	20.00 ft / 6.10 m
	   - Stern:		20.00 ft / 6.10 m
	   - Average freeboard:	30.39 ft / 9.26 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 146.4 %
		- Above water (accommodation/working, high = better): 257.7 %
	Waterplane Area: 48,905 Square feet or 4,543 Square metres
	Displacement factor (Displacement / loading): 108 %
	Structure weight / hull surface area: 148 lbs/sq ft or 721 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.95
		- Longitudinal: 1.53
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

More Springsharp

I highly recommend Springsharp, despite my frequent frustrations with the program. My relationship with Springsharp is similar to me and Mozilla Firefox, in that I have a love-hate relationship with them. My main problem with Springsharp is how it responds to my attempts to improve hull strength, stability, and seakeeping capabilities. I am, through trial-and-error, starting to understand what to do:

1. Decrease speed
2. Increase the block coefficient and displacement
3. If all else fails, increase dimensions
4. If the "Performance" complains about the ship "underperforming", decrease the block coefficient and displacement. You will then probably have to decrease speed, to compensate.

The GB/BB/1906 fast battleship design

My friend Cliff designed a British fast battleship that had good armor, speed, and a light armament. I called the design GB/BB/1906, as that was the year of the estimates in which it was included for the first time. A later version had 12in/50 guns. I was able to run the design through Springsharp, and was able to reach an acceptable design. The only thing I didn't like was that I had to inflate the size too much, to 28,165 tons. At least the standard displacement is the right figure: 25,194 tons. This is the report:

GB/BB/1906 (Britannia), Great Britain Battleship laid down 1906

Displacement:
	24,286 t light; 25,194 t standard; 28,165 t normal; 30,543 t full load

Dimensions: Length overall / water x beam x draught
	680.00 ft / 680.00 ft x 87.70 ft x 28.50 ft (normal load)
	207.26 m / 207.26 m x 26.73 m  x 8.69 m

Armament:
      6 - 12.00" / 305 mm guns (3x2 guns), 864.00lbs / 391.90kg shells, 1906 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, majority forward, all raised mounts - superfiring
      8 - 6.00" / 152 mm guns (4x2 guns), 108.00lbs / 48.99kg shells, 1906 Model
	  Breech loading guns in turrets (on barbettes)
	  on side, evenly spread, all raised mounts
	Weight of broadside 6,048 lbs / 2,743 kg
	Shells per gun, main battery: 100

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	13.4" / 340 mm	360.00 ft / 109.73 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 81 % of normal length

   - Torpedo Bulkhead:
		1.50" / 38 mm	360.00 ft / 109.73 m	27.00 ft / 8.23 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	13.4" / 340 mm	7.00" / 178 mm		13.4" / 340 mm
	2nd:	3.38" / 86 mm	2.00" / 51 mm		2.00" / 51 mm

   - Armour deck: 4.50" / 114 mm, Conning tower: 6.75" / 171 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 52,361 shp / 39,062 Kw = 24.00 kts
	Range 6,000nm at 15.00 kts
	Bunker at max displacement = 5,349 tons

Complement:
	1,086 - 1,413

Cost:
	£1.961 million / $7.844 million

Distribution of weights at normal displacement:
	Armament: 756 tons, 2.7 %
	Armour: 10,095 tons, 35.8 %
	   - Belts: 3,444 tons, 12.2 %
	   - Torpedo bulkhead: 539 tons, 1.9 %
	   - Armament: 2,414 tons, 8.6 %
	   - Armour Deck: 3,564 tons, 12.7 %
	   - Conning Tower: 135 tons, 0.5 %
	Machinery: 3,400 tons, 12.1 %
	Hull, fittings & equipment: 10,035 tons, 35.6 %
	Fuel, ammunition & stores: 3,879 tons, 13.8 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  43,844 lbs / 19,887 Kg = 50.7 x 12.0 " / 305 mm shells or 7.1 torpedoes
	Stability (Unstable if below 1.00): 1.01
	Metacentric height 4.2 ft / 1.3 m
	Roll period: 18.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 96 %
			- Recoil effect (Restricted arc if above 1.00): 0.69
	Seaboat quality  (Average = 1.00): 1.92

Hull form characteristics:
	Hull has raised forecastle, rise forward of midbreak
	Block coefficient: 0.580
	Length to Beam Ratio: 7.75 : 1
	'Natural speed' for length: 26.08 kts
	Power going to wave formation at top speed: 44 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -1.00 degrees
	Stern overhang: -2.00 ft / -0.61 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		31.00 ft / 9.45 m
	   - Forecastle (71 %):	30.00 ft / 9.14 m (29.50 ft / 8.99 m aft of break)
	   - Mid (71 %):		29.00 ft / 8.84 m (20.00 ft / 6.10 m aft of break)
	   - Quarterdeck (15 %):	20.00 ft / 6.10 m
	   - Stern:		21.00 ft / 6.40 m
	   - Average freeboard:	27.46 ft / 8.37 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 78.0 %
		- Above water (accommodation/working, high = better): 150.2 %
	Waterplane Area: 42,808 Square feet or 3,977 Square metres
	Displacement factor (Displacement / loading): 123 %
	Structure weight / hull surface area: 152 lbs/sq ft or 743 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.95
		- Longitudinal: 1.60
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is excellent
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

I really recommend Springsharp to those who want to design their own ships

While I would do somethings differently (and do, in my own warship design program), I highly recommend Springsharp to anyone who wants to design their own warships. I don't really have any interest, right now, in designing ironclads, but you could with Springsharp. My own program is geared up for 1903 to 1945 ships (primarily 1903 to 1927). I have not attempted to get very far into ironclad design, at least to be able to actually look at design parameters. I firmly believe that my power calculations would work for 1860 to 1903, and in fact, expanded the data tables to allow for ships with very large "displacement-length" ratios. Ironclads were generally very short for their displacement. The speed-length ratios involved were generally pretty low. I would probably have to add Schoenherr data lower down in the table, as I only entered what I needed for more modern ships. The key parameter is the Reynolds number. That is the index into the Schoenherr table. I use a table from Morton Gertler's book, A REANALYSIS OF THE ORIGINAL TEST DATA FOR THE TAYLOR STANDARD SERIES. The Society of Naval Architects and Marine Engineers has republished the book. I bought a used copy in 2001, as Frank Fox had highly recommended the book to me. I use residual resistance data from graphs in David W. Taylor's The Speed andPower of Ships: A Manual of Marine Propulsion.

This is what I could make work as a scout cruiser

I was disappointed at what I could make work in Springsharp as a 1905 scout cruiser that was very destroyer-like. I had to drastically reduce the speed in order for the design to be viable. I would be interested to see if at a later date, it would work as intended. Note that this was based on the concept for Churchill's "Super Swift" from 1912, including the 2in side armor:

Ger/CS/1905, Germany scout cruiser laid down 1906 (Engine 1908)

Displacement:
	2,354 t light; 2,430 t standard; 2,679 t normal; 2,879 t full load

Dimensions: Length overall / water x beam x draught
	372.27 ft / 370.00 ft x 38.00 ft x 13.50 ft (normal load)
	113.47 m / 112.78 m x 11.58 m  x 4.11 m

Armament:
      5 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1906 Model
	  Quick firing guns in deck mounts 
	  on centreline ends, majority forward, all raised mounts - superfiring
	Weight of broadside 160 lbs / 73 kg
	Shells per gun, main battery: 250
	2 - 18.0" / 457.2 mm above water torpedoes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	2.00" / 51 mm	165.00 ft / 50.29 m	8.00 ft / 2.44 m
	Ends:	Unarmoured
	  Main Belt covers 69 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

Machinery:
	Oil fired boilers, steam turbines, 
	Direct drive, 4 shafts, 40,816 shp / 30,449 Kw = 31.00 kts
	Range 2,250nm at 15.00 kts
	Bunker at max displacement = 449 tons

Complement:
	186 - 242

Cost:
	£0.328 million / $1.314 million

Distribution of weights at normal displacement:
	Armament: 20 tons, 0.7 %
	Armour: 118 tons, 4.4 %
	   - Belts: 118 tons, 4.4 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 0 tons, 0.0 %
	   - Armour Deck: 0 tons, 0.0 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 1,637 tons, 61.1 %
	Hull, fittings & equipment: 579 tons, 21.6 %
	Fuel, ammunition & stores: 325 tons, 12.1 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  585 lbs / 265 Kg = 18.3 x 4.0 " / 102 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.83
	Metacentric height 3.1 ft / 0.9 m
	Roll period: 9.1 seconds
	Steadiness	- As gun platform (Average = 50 %): 56 %
			- Recoil effect (Restricted arc if above 1.00): 0.07
	Seaboat quality  (Average = 1.00): 1.26

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.494
	Length to Beam Ratio: 9.74 : 1
	'Natural speed' for length: 19.24 kts
	Power going to wave formation at top speed: 66 %
	Trim (Max stability = 0, Max steadiness = 100): 45
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 1.50 ft / 0.46 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		22.00 ft / 6.71 m
	   - Forecastle (34 %):	21.00 ft / 6.40 m
	   - Mid (34 %):		20.00 ft / 6.10 m (14.00 ft / 4.27 m aft of break)
	   - Quarterdeck (13 %):	14.00 ft / 4.27 m
	   - Stern:		15.00 ft / 4.57 m
	   - Average freeboard:	16.58 ft / 5.05 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 203.1 %
		- Above water (accommodation/working, high = better): 124.0 %
	Waterplane Area: 9,317 Square feet or 866 Square metres
	Displacement factor (Displacement / loading): 61 %
	Structure weight / hull surface area: 32 lbs/sq ft or 155 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.49
		- Longitudinal: 1.65
		- Overall: 0.56
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is excellent
	Good seaboat, rides out heavy weather easily

I'm having a lot of trouble with a scout cruiser design

I have a pretty straight forward scout cruiser design (destoyer-like), and Springsharp "doesn't like it". I don't know if the problem is that Springsharp has inherited Springstyle's lack of ability to deal with destroyers, or what the problem is. I have spent the last hour "wrestling" with Springsharp, and I cannot seem to arrive at a good combination of stability and seakeeping ability. It really should be no big deal: 370ft x 38ft x 13ft, and 2,480 tons, normal displacement. The armament is light: 5-4in/50 QF and 2-18in TT. The speed is high, being 36 knots, but that doesn't seem to really affect the issue.

Super-Inflated, Super-Fast Battlecruiser using Springsharp

I decided to see what it would take to drive a large, fast battlecruiser at 40 knots. One nice thing is that there is enough leeway to have a good armament and improved armor. To do it, it takes extreme dimension and displacement inflation:

GB/CB/alt 8-shaft Super Fast, Great Britain Battlecruiser laid down 1923

Displacement:
	68,043 t light; 70,794 t standard; 74,376 t normal; 77,242 t full load

Dimensions: Length overall / water x beam x draught
	1,059.73 ft / 1,050.00 ft x 135.00 ft x 38.50 ft (normal load)
	323.00 m / 320.04 m x 41.15 m  x 11.73 m

Armament:
      9 - 17.00" / 432 mm guns (3x3 guns), 2,456.50lbs / 1,114.25kg shells, 1923 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline, evenly spread, 2 raised mounts
	  Aft Main mounts separated by engine room
      16 - 4.00" / 102 mm guns (8x2 guns), 32.00lbs / 14.51kg shells, 1923 Model
	  Quick firing guns in deck mounts 
	  on side, evenly spread, all raised mounts
	Weight of broadside 22,621 lbs / 10,260 kg
	Shells per gun, main battery: 100

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	9.00" / 229 mm	675.00 ft / 205.74 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 99 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
		1.50" / 38 mm	675.00 ft / 205.74 m	29.00 ft / 8.84 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	12.0" / 305 mm	9.00" / 229 mm		10.0" / 254 mm
	2nd:	1.00" / 25 mm	      -			      -

   - Armour deck: 3.00" / 76 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 8 shafts, 493,970 shp / 368,501 Kw = 40.00 kts
	Range 7,500nm at 15.00 kts
	Bunker at max displacement = 6,447 tons

Complement:
	2,251 - 2,927

Cost:
	£20.562 million / $82.246 million

Distribution of weights at normal displacement:
	Armament: 2,828 tons, 3.8 %
	Armour: 14,597 tons, 19.6 %
	   - Belts: 4,141 tons, 5.6 %
	   - Torpedo bulkhead: 1,086 tons, 1.5 %
	   - Armament: 4,032 tons, 5.4 %
	   - Armour Deck: 5,337 tons, 7.2 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 16,510 tons, 22.2 %
	Hull, fittings & equipment: 34,109 tons, 45.9 %
	Fuel, ammunition & stores: 6,333 tons, 8.5 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  85,738 lbs / 38,890 Kg = 34.9 x 17.0 " / 432 mm shells or 9.4 torpedoes
	Stability (Unstable if below 1.00): 1.06
	Metacentric height 8.8 ft / 2.7 m
	Roll period: 19.1 seconds
	Steadiness	- As gun platform (Average = 50 %): 72 %
			- Recoil effect (Restricted arc if above 1.00): 0.62
	Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
	Hull has a flush deck
	  and transom stern
	Block coefficient: 0.477
	Length to Beam Ratio: 7.78 : 1
	'Natural speed' for length: 37.87 kts
	Power going to wave formation at top speed: 57 %
	Trim (Max stability = 0, Max steadiness = 100): 64
	Bow angle (Positive = bow angles forward): 4.00 degrees
	Stern overhang: 7.00 ft / 2.13 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		39.00 ft / 11.89 m
	   - Forecastle (33 %):	37.00 ft / 11.28 m
	   - Mid (0 %):		35.00 ft / 10.67 m
	   - Quarterdeck (20 %):	35.00 ft / 10.67 m
	   - Stern:		37.00 ft / 11.28 m
	   - Average freeboard:	35.79 ft / 10.91 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 118.2 %
		- Above water (accommodation/working, high = better): 279.1 %
	Waterplane Area: 96,162 Square feet or 8,934 Square metres
	Displacement factor (Displacement / loading): 106 %
	Structure weight / hull surface area: 248 lbs/sq ft or 1,212 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.55
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform

I had to inflate the "Super Fast Battlecruiser" design to work with Springsharp

I am very interested in the Springsharp program, especially since I also have a program (although mine is not in the public domain, at this point). I just tried to make my alternate "Super Fast Battlecruiser" design work with Springsharp. I guess I am happy that something like what I would have liked to have is possible at all:

GB/CB/alt 6-shaft Super Fast, Great Britain Battlecruiser laid down 1922 (Engine 1926)

Displacement:
	41,777 t light; 42,680 t standard; 45,152 t normal; 47,130 t full load

Dimensions: Length overall / water x beam x draught
	874.66 ft / 867.00 ft x 119.00 ft x 34.00 ft (normal load)
	266.60 m / 264.26 m x 36.27 m  x 10.36 m

Armament:
     4 - 17.00" / 432 mm guns (2x2 guns), 2,456.50lbs / 1,114.25kg shells, 1922 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, evenly spread, all raised mounts
     16 - 4.00" / 102 mm guns (8x2 guns), 32.00lbs / 14.51kg shells, 1922 Model
	  Quick firing guns in deck mounts
	  on side, evenly spread, all raised mounts
	Weight of broadside 10,338 lbs / 4,689 kg
	Shells per gun, main battery: 0

Armour:
  - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	7.00" / 178 mm	575.00 ft / 175.26 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 102 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

  - Torpedo Bulkhead:
		1.50" / 38 mm	575.00 ft / 175.26 m	29.00 ft / 8.84 m

  - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	12.0" / 305 mm	7.00" / 178 mm		9.00" / 229 mm
	2nd:	1.00" / 25 mm	      -			      -

  - Armour deck: 3.00" / 76 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 6 shafts, 312,670 shp / 233,252 Kw = 38.00 kts
	Range 7,500nm at 15.00 kts
	Bunker at max displacement = 4,450 tons

Complement:
	1,548 - 2,013

Cost:
	£10.770 million / $43.079 million

Distribution of weights at normal displacement:
	Armament: 1,292 tons, 2.9 %
	Armour: 9,465 tons, 21.0 %
	   - Belts: 2,737 tons, 6.1 %
	   - Torpedo bulkhead: 925 tons, 2.0 %
	   - Armament: 2,007 tons, 4.4 %
	   - Armour Deck: 3,796 tons, 8.4 %
	   - Conning Tower: 0 tons, 0.0 %
	Machinery: 10,009 tons, 22.2 %
	Hull, fittings & equipment: 21,011 tons, 46.5 %
	Fuel, ammunition & stores: 3,375 tons, 7.5 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  58,836 lbs / 26,687 Kg = 24.0 x 17.0 " / 432 mm shells or 7.4 torpedoes
	Stability (Unstable if below 1.00): 1.06
	Metacentric height 7.3 ft / 2.2 m
	Roll period: 18.5 seconds
	Steadiness	- As gun platform (Average = 50 %): 71 %
			- Recoil effect (Restricted arc if above 1.00): 0.47
	Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
	Hull has rise forward of midbreak
	  and transom stern
	Block coefficient: 0.451
	Length to Beam Ratio: 7.29 : 1
	'Natural speed' for length: 34.76 kts
	Power going to wave formation at top speed: 59 %
	Trim (Max stability = 0, Max steadiness = 100): 64
	Bow angle (Positive = bow angles forward): 4.00 degrees
	Stern overhang: 5.00 ft / 1.52 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		38.00 ft / 11.58 m
	   - Forecastle (32 %):	37.00 ft / 11.28 m
	   - Mid (38 %):		37.00 ft / 11.28 m (30.00 ft / 9.14 m aft of break)
	   - Quarterdeck (20 %):	30.00 ft / 9.14 m
	   - Stern:		31.00 ft / 9.45 m
	   - Average freeboard:	32.89 ft / 10.02 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 111.0 %
		- Above water (accommodation/working, high = better): 259.8 %
	Waterplane Area: 68,391 Square feet or 6,354 Square metres
	Displacement factor (Displacement / loading): 113 %
	Structure weight / hull surface area: 212 lbs/sq ft or 1,035 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.95
		- Longitudinal: 1.88
		- Overall: 1.02
	Hull space for machinery, storage, compartmentation is adequate
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform

I just ran my Ger/CS/1905 Design in SpringSharp

I had to make some compromises, but overall I was happy enough with the result. It seemed like I needed to reduce the beam and increase the length to make SpringSharp "happy".

Ger/CS/1905, Germany CL laid down 1906 (Engine 1908)

Displacement:
	2,256 t light; 2,319 t standard; 2,480 t normal; 2,609 t full load

Dimensions: Length overall / water x beam x draught
	377.76 ft / 375.00 ft x 37.00 ft x 13.00 ft (normal load)
	115.14 m / 114.30 m x 11.28 m  x 3.96 m

Armament:
     5 - 4.00" / 102 mm guns (3 mounts), 32.00lbs / 14.51kg shells, 1906 Model
	  Quick firing guns in deck mounts
	  on centreline ends, majority forward, all raised mounts - superfiring
	Weight of broadside 160 lbs / 73 kg
	Shells per gun, main battery: 150
	2 - 21.0" / 533.4 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines,
	Direct drive, 2 shafts, 43,533 shp / 32,476 Kw = 32.00 kts
	Range 2,500nm at 12.00 kts
	Bunker at max displacement = 290 tons

Complement:
	175 - 228

Cost:
	£0.322 million / $1.289 million

Distribution of weights at normal displacement:
	Armament: 20 tons, 0.8 %
	Machinery: 1,618 tons, 65.2 %
	Hull, fittings & equipment: 618 tons, 24.9 %
	Fuel, ammunition & stores: 224 tons, 9.0 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  509 lbs / 231 Kg = 15.9 x 4.0 " / 102 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.60
	Metacentric height 2.5 ft / 0.8 m
	Roll period: 9.9 seconds
	Steadiness	- As gun platform (Average = 50 %): 76 %
			- Recoil effect (Restricted arc if above 1.00): 0.11
	Seaboat quality  (Average = 1.00): 1.31

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.481
	Length to Beam Ratio: 10.14 : 1
	'Natural speed' for length: 19.36 kts
	Power going to wave formation at top speed: 66 %
	Trim (Max stability = 0, Max steadiness = 100): 58
	Bow angle (Positive = bow angles forward): 3.00 degrees
	Stern overhang: 1.50 ft / 0.46 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		24.00 ft / 7.32 m
	   - Forecastle (20 %):	23.00 ft / 7.01 m
	   - Mid (33 %):		22.00 ft / 6.71 m (14.00 ft / 4.27 m aft of break)
	   - Quarterdeck (15 %):	14.00 ft / 4.27 m
	   - Stern:		15.00 ft / 4.57 m
	   - Average freeboard:	17.06 ft / 5.20 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 216.4 %
		- Above water (accommodation/working, high = better): 139.9 %
	Waterplane Area: 9,090 Square feet or 844 Square metres
	Displacement factor (Displacement / loading): 54 %
	Structure weight / hull surface area: 33 lbs/sq ft or 162 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.50
		- Longitudinal: 2.00
		- Overall: 0.58
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is excellent
	Ship has slow, easy roll, a good, steady gun platform
	Good seaboat, rides out heavy weather easily

The Warship Project discussion forum

The Springsharp site has a discussion board about warship design. They also have an alternate world game project, which includes using new warship designs. I am interested in the subject, so I registered for the discussion forum. There are some members who are quite good a producing ship drawings using graphic editing. There is definitely a great deal of enthusiasm among participants, even those whose drawings are more diagrammatic than realistic. My one criticism might be that they would benefit from doing inboard profiles and internal layouts before doing the outboard profile. Frank Fox, noted all-around naval history and history of warship design guru (which is not widely known), has told me that I should not do an outboard profile without having done an inboard profile first. That applies to ships from the 16th and 17th Centuries as well as to ships in the period from 19o3-1945. I would highly recommend registering so that you can read the forum, if you are interested in designing your own warships. I would also recommend downloading the Springsharp program, as I am not at liberty to distribute my program.

I just did a small CL alternative design: 9-5.1in guns

I just tried out my alternative idea for the small CL armed with 5.1in (13cm) guns. I have thought that a three-turret design was more balanced, and reduced topweight. My main concern is that it might slow the rate of fire for what should be DP guns. The barbette diameter for the triple 5.1in gun turret is 20ft. The metacentric height at normal load pops up to 3.3ft. A side benefit was that the side armor could be increased to 2.5in, which is still so light that it is almost a waste of weight.