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