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Sunday, January 09, 2005

I thought it would be interesting to see a "Maximum Battleship"

My concept of a "Maximum Battleship" includes 24in guns. Such weapons were perfectly possible. The Germans could and did build guns of that order of size or bigger. I would use quadruple turrets, as well, so I could have 12-24in/45 guns. The secondary armament of 24-5in/50 seems too small, but that is what I chose. I only used an 18in armor basis. 32 knots was easy to achieve. The only thing I can see wrong is that Springsharp doesn't like the idea of a 24in gun. Either that, or there is some fault in my design that makes it not work with a 24in gun, but I can't tell that from the report.
GB/BB/1923a1, Great Britain Battleship laid down 1923

Displacement:
	172,454 t light; 181,000 t standard; 191,873 t normal; 200,571 t full load

Dimensions: Length overall / water x beam x draught
	1,354.47 ft / 1,350.00 ft x 180.00 ft x 42.00 ft (normal load)
	412.84 m / 411.48 m x 54.86 m  x 12.80 m

Armament:
      12 - 24.00" / 610 mm guns (3x4 guns), 6,912.00lbs / 3,135.23kg shells, 1923 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, majority forward, all raised mounts - superfiring
      24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1923 Model
	  Quick firing guns in turrets (on barbettes)
	  on side, evenly spread, all raised mounts
	Weight of broadside 84,444 lbs / 38,303 kg
	Shells per gun, main battery: 100

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	18.0" / 457 mm	880.00 ft / 268.22 m	20.00 ft / 6.10 m
	Ends:	Unarmoured
	  Main Belt covers 100 % of normal length

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	18.0" / 457 mm	12.0" / 305 mm		18.0" / 457 mm
	2nd:	4.00" / 102 mm	4.00" / 102 mm		4.00" / 102 mm

   - Armour deck: 9.00" / 229 mm, Conning tower: 18.00" / 457 mm

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 8 shafts, 440,514 shp / 328,624 Kw = 32.00 kts
	Range 12,000nm at 15.00 kts
	Bunker at max displacement = 19,571 tons

Complement:
	4,583 - 5,959

Cost:
	£49.349 million / $197.396 million

Distribution of weights at normal displacement:
	Armament: 10,556 tons, 5.5 %
	Armour: 59,807 tons, 31.2 %
	   - Belts: 13,658 tons, 7.1 %
	   - Torpedo bulkhead: 0 tons, 0.0 %
	   - Armament: 13,637 tons, 7.1 %
	   - Armour Deck: 31,222 tons, 16.3 %
	   - Conning Tower: 1,290 tons, 0.7 %
	Machinery: 14,723 tons, 7.7 %
	Hull, fittings & equipment: 87,369 tons, 45.5 %
	Fuel, ammunition & stores: 19,418 tons, 10.1 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  310,609 lbs / 140,890 Kg = 44.9 x 24.0 " / 610 mm shells or 11.8 torpedoes
	Stability (Unstable if below 1.00): 1.13
	Metacentric height 15.2 ft / 4.6 m
	Roll period: 19.4 seconds
	Steadiness	- As gun platform (Average = 50 %): 68 %
			- Recoil effect (Restricted arc if above 1.00): 0.77
	Seaboat quality  (Average = 1.00): 1.36

Hull form characteristics:
	Hull has a flush deck
	Block coefficient: 0.658
	Length to Beam Ratio: 7.50 : 1
	'Natural speed' for length: 36.74 kts
	Power going to wave formation at top speed: 43 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 3.00 ft / 0.91 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		42.00 ft / 12.80 m
	   - Forecastle (20 %):	37.00 ft / 11.28 m
	   - Mid (0 %):		37.00 ft / 11.28 m
	   - Quarterdeck (15 %):	37.00 ft / 11.28 m
	   - Stern:		37.00 ft / 11.28 m
	   - Average freeboard:	37.40 ft / 11.40 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 66.7 %
		- Above water (accommodation/working, high = better): 288.4 %
	Waterplane Area: 187,520 Square feet or 17,421 Square metres
	Displacement factor (Displacement / loading): 110 %
	Structure weight / hull surface area: 359 lbs/sq ft or 1,754 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.99
		- Longitudinal: 1.06
		- Overall: 1.00
	Hull space for machinery, storage, compartmentation is excellent
	Room for accommodation and workspaces is excellent
	Good seaboat, rides out heavy weather easily

Warning: Calibre too large - Main battery

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