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Sunday, January 23, 2005

Another "super ship": US/BB/1936

I drew a picture dated June 13, 2001 depicting a very large battleship with a sort of US look to it. I scaled off that picture and used the specs to enter into Springsharp. The main change that I had to make was to lower the freeboard, as what I had drawn was excessive. The result is a very capable ship. It is all that I would want in a very large battleship:
US/BB/1936 Very Large, United States Battleship laid down 1936

Displacement:
	107,265 t light; 111,822 t standard; 118,713 t normal; 124,225 t full load

Dimensions: Length overall / water x beam x draught
	1,203.61 ft / 1,200.00 ft x 150.00 ft x 41.00 ft (normal load)
	366.86 m / 365.76 m x 45.72 m  x 12.50 m

Armament:
      9 - 21.00" / 533 mm guns (3x3 guns), 4,630.50lbs / 2,100.36kg shells, 1936 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, majority forward, all raised mounts - superfiring
      12 - 6.00" / 152 mm guns (6x2 guns), 108.00lbs / 48.99kg shells, 1936 Model
	  Quick firing guns in turrets (on barbettes)
	  on side, evenly spread, all raised mounts
      8 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1936 Model
	  Anti-aircraft guns in deck mounts with hoists
	  on side, evenly spread, all raised mounts
      44 - 1.57" / 40.0 mm guns (11x4 guns), 1.95lbs / 0.89kg shells, 1936 Model
	  Anti-aircraft guns in deck mounts 
	  on side ends, majority aft, all raised mounts - superfiring
	Weight of broadside 43,312 lbs / 19,646 kg
	Shells per gun, main battery: 90

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	17.0" / 432 mm	640.00 ft / 195.07 m	20.00 ft / 6.10 m
	Ends:	Unarmoured
	  Main Belt covers 82 % of normal length

   - Torpedo Bulkhead:
		3.00" / 76 mm	640.00 ft / 195.07 m	38.00 ft / 11.58 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	17.0" / 432 mm	10.0" / 254 mm		17.0" / 432 mm
	2nd:	4.00" / 102 mm	3.00" / 76 mm		4.00" / 102 mm
	3rd:	2.00" / 51 mm	      -			1.00" / 25 mm

   - Armour deck: 7.00" / 178 mm, Conning tower: 17.00" / 432 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 6 shafts, 285,230 shp / 212,782 Kw = 31.00 kts
	Range 12,000nm at 15.00 kts
	Bunker at max displacement = 12,403 tons

Complement:
	3,197 - 4,157

Cost:
	£49.682 million / $198.730 million

Distribution of weights at normal displacement:
	Armament: 5,414 tons, 4.6 %
	Armour: 39,654 tons, 33.4 %
	   - Belts: 9,644 tons, 8.1 %
	   - Torpedo bulkhead: 2,700 tons, 2.3 %
	   - Armament: 9,958 tons, 8.4 %
	   - Armour Deck: 16,467 tons, 13.9 %
	   - Conning Tower: 885 tons, 0.7 %
	Machinery: 8,003 tons, 6.7 %
	Hull, fittings & equipment: 54,194 tons, 45.7 %
	Fuel, ammunition & stores: 11,447 tons, 9.6 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  226,994 lbs / 102,963 Kg = 49.0 x 21.0 " / 533 mm shells or 42.6 torpedoes
	Stability (Unstable if below 1.00): 1.03
	Metacentric height 9.8 ft / 3.0 m
	Roll period: 20.1 seconds
	Steadiness	- As gun platform (Average = 50 %): 80 %
			- Recoil effect (Restricted arc if above 1.00): 0.96
	Seaboat quality  (Average = 1.00): 1.61

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.563
	Length to Beam Ratio: 8.00 : 1
	'Natural speed' for length: 34.64 kts
	Power going to wave formation at top speed: 41 %
	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:		46.00 ft / 14.02 m
	   - Forecastle (18 %):	37.00 ft / 11.28 m
	   - Mid (0 %):		37.00 ft / 11.28 m
	   - Quarterdeck (18 %):	37.00 ft / 11.28 m
	   - Stern:		39.00 ft / 11.89 m
	   - Average freeboard:	37.81 ft / 11.52 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 65.4 %
		- Above water (accommodation/working, high = better): 280.3 %
	Waterplane Area: 127,162 Square feet or 11,814 Square metres
	Displacement factor (Displacement / loading): 120 %
	Structure weight / hull surface area: 301 lbs/sq ft or 1,471 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.32
		- 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

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