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Sunday, January 09, 2005

My Ger/BB/1915 design, which I had intended to produce, is better than I expected

I have this battleship design (Ger/BB/1915), which seems to be like a buoy. I had only expected to be able to get 20 knots from the ship, but I can get 27 knots. The dimensions are 750ft x 130ft x 36ft, with a 72,000 ton displacement. I had originally thought it would be 60,000 tons, but I had increased the displacement to be able to carry heavy guns and armor. With geared turbines in 1915, the cost to get 27 knots was minimal. The "Performance" page was already complaining about the design "underperforming" for the displacement. The ship is EXTREMELY short for the displacement, but that was intentional to keep the citadel short. I have a really nice looking drawing that looks like a WWII US Battleship, with two funnels and a tower mast.
Ger/BB/1915 A1, Germany Battleship laid down 1915

Displacement:
	64,621 t light; 67,307 t standard; 72,005 t normal; 75,764 t full load

Dimensions: Length overall / water x beam x draught
	751.22 ft / 750.00 ft x 130.00 ft x 36.00 ft (normal load)
	228.97 m / 228.60 m x 39.62 m  x 10.97 m

Armament:
      9 - 18.00" / 457 mm guns (3x3 guns), 2,916.00lbs / 1,322.68kg shells, 1915 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, majority forward, all raised mounts - superfiring
      24 - 5.00" / 127 mm guns (2x12 guns), 62.50lbs / 28.35kg shells, 1915 Model
	  Quick firing guns in turrets (on barbettes)
	  on side, evenly spread, all raised mounts
	Weight of broadside 27,744 lbs / 12,584 kg
	Shells per gun, main battery: 80

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	17.0" / 432 mm	490.00 ft / 149.35 m	19.00 ft / 5.79 m
	Ends:	Unarmoured
	  Main Belt covers 101 % of normal length

   - Torpedo Bulkhead:
		3.00" / 76 mm	490.00 ft / 149.35 m	32.00 ft / 9.75 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	16.0" / 406 mm	10.0" / 254 mm		16.0" / 406 mm
	2nd:	2.00" / 51 mm	2.00" / 51 mm		2.00" / 51 mm

   - Armour deck: 8.00" / 203 mm, Conning tower: 16.00" / 406 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 4 shafts, 156,360 shp / 116,645 Kw = 27.00 kts
	Range 8,000nm at 15.00 kts
	Bunker at max displacement = 8,457 tons

Complement:
	2,197 - 2,857

Cost:
	£8.733 million / $34.932 million

Distribution of weights at normal displacement:
	Armament: 3,468 tons, 4.8 %
	Armour: 27,640 tons, 38.4 %
	   - Belts: 7,059 tons, 9.8 %
	   - Torpedo bulkhead: 1,740 tons, 2.4 %
	   - Armament: 6,492 tons, 9.0 %
	   - Armour Deck: 11,752 tons, 16.3 %
	   - Conning Tower: 597 tons, 0.8 %
	Machinery: 5,923 tons, 8.2 %
	Hull, fittings & equipment: 27,590 tons, 38.3 %
	Fuel, ammunition & stores: 7,385 tons, 10.3 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  113,277 lbs / 51,382 Kg = 38.8 x 18.0 " / 457 mm shells or 19.6 torpedoes
	Stability (Unstable if below 1.00): 1.04
	Metacentric height 8.0 ft / 2.4 m
	Roll period: 19.3 seconds
	Steadiness	- As gun platform (Average = 50 %): 62 %
			- Recoil effect (Restricted arc if above 1.00): 0.78
	Seaboat quality  (Average = 1.00): 1.25

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.718
	Length to Beam Ratio: 5.77 : 1
	'Natural speed' for length: 27.39 kts
	Power going to wave formation at top speed: 55 %
	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:		35.00 ft / 10.67 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:	30.40 ft / 9.27 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 74.5 %
		- Above water (accommodation/working, high = better): 206.5 %
	Waterplane Area: 79,407 Square feet or 7,377 Square metres
	Displacement factor (Displacement / loading): 107 %
	Structure weight / hull surface area: 257 lbs/sq ft or 1,252 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.94
		- Longitudinal: 1.92
		- Overall: 1.01
	Hull space for machinery, storage, compartmentation is excellent
	Room for accommodation and workspaces is excellent
	Good seaboat, rides out heavy weather easily

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