GB/CB/1927 Super Fast-Alt2, Great Britain Battlecruiser laid down 1927 (Engine 1945)
Displacement:
37,494 t light; 38,752 t standard; 40,000 t normal; 40,998 t full load
Dimensions: Length overall / water x beam x draught
838.99 ft / 836.00 ft x 108.00 ft x 40.00 ft (normal load)
255.72 m / 254.81 m x 32.92 m x 12.19 m
Armament:
4 - 17.00" / 432 mm guns (2x2 guns), 2,456.50lbs / 1,114.25kg shells, 1927 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts
12 - 4.00" / 102 mm guns (6x2 guns), 32.00lbs / 14.51kg shells, 1927 Model
Quick firing guns in deck mounts with hoists
on side ends, evenly spread, all raised mounts - superfiring
Weight of broadside 10,210 lbs / 4,631 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.00" / 178 mm 540.00 ft / 164.59 m 17.00 ft / 5.18 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 540.00 ft / 164.59 m 32.00 ft / 9.75 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: 3.00" / 76 mm, Conning tower: 7.00" / 178 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 6 shafts, 345,860 shp / 258,011 Kw = 40.00 kts
Range 7,000nm at 12.00 kts
Bunker at max displacement = 2,247 tons
Complement:
1,413 - 1,838
Cost:
£13.117 million / $52.466 million
Distribution of weights at normal displacement:
Armament: 1,276 tons, 3.2 %
Armour: 8,674 tons, 21.7 %
- Belts: 2,714 tons, 6.8 %
- Torpedo bulkhead: 959 tons, 2.4 %
- Armament: 1,644 tons, 4.1 %
- Armour Deck: 3,180 tons, 8.0 %
- Conning Tower: 176 tons, 0.4 %
Machinery: 8,734 tons, 21.8 %
Hull, fittings & equipment: 18,810 tons, 47.0 %
Fuel, ammunition & stores: 2,506 tons, 6.3 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
48,101 lbs / 21,818 Kg = 19.6 x 17.0 " / 432 mm shells or 5.9 torpedoes
Stability (Unstable if below 1.00): 1.06
Metacentric height 6.2 ft / 1.9 m
Roll period: 18.1 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.56
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.388
Length to Beam Ratio: 7.74 : 1
'Natural speed' for length: 34.30 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 3.00 degrees
Stern overhang: 1.00 ft / 0.30 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 38.00 ft / 11.58 m
- Forecastle (20 %): 30.00 ft / 9.14 m
- Mid (50 %): 30.00 ft / 9.14 m
- Quarterdeck (15 %): 30.00 ft / 9.14 m
- Stern: 30.00 ft / 9.14 m
- Average freeboard: 30.64 ft / 9.34 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 116.3 %
- Above water (accommodation/working, high = better): 231.7 %
Waterplane Area: 57,303 Square feet or 5,324 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 210 lbs/sq ft or 1,027 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.24
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
This is a forum for discussion of topics relating to the Dreadnought era, prior to the ascendency of naval aviation. We will be discussing history, ship design, and naval wargaming.
Friday, February 04, 2005
Back to the bizarre: the super fast (Alternative-2) battlecruiser
So, what is the best I could do, with a relatively short fast battlecruiser? I took my "Alternative-2" design for the 192x super fast battlecruiser, which has a high-freeboard, flush deck, with a modest clipper bow, with a good deal of flare. I was able to achieve 40 knots, but had to make some sacrifices to do it.
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