GB/BB/1927, Great Britain Battleship laid down 1927
Displacement:
42,433 t light; 44,100 t standard; 46,570 t normal; 48,545 t full load
Dimensions: Length overall / water x beam x draught
801.15 ft / 800.00 ft x 108.00 ft x 35.00 ft (normal load)
244.19 m / 243.84 m x 32.92 m x 10.67 m
Armament:
8 - 15.00" / 381 mm guns (4x2 guns), 1,687.50lbs / 765.44kg shells, 1927 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts - superfiring
16 - 5.00" / 127 mm guns (8x2 guns), 62.50lbs / 28.35kg shells, 1927 Model
Quick firing guns in deck mounts with hoists
on side, evenly spread, 4 raised mounts
Weight of broadside 14,500 lbs / 6,577 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.0" / 330 mm 475.00 ft / 144.78 m 17.00 ft / 5.18 m
Ends: 6.00" / 152 mm 240.00 ft / 73.15 m 16.00 ft / 4.88 m
85.00 ft / 25.91 m Unarmoured ends
Main Belt covers 91 % of normal length
- Torpedo Bulkhead:
2.00" / 51 mm 475.00 ft / 144.78 m 27.00 ft / 8.23 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.0" / 330 mm 8.00" / 203 mm 13.0" / 330 mm
2nd: 2.00" / 51 mm - -
- Armour deck: 5.00" / 127 mm, Conning tower: 9.00" / 229 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 175,507 shp / 130,928 Kw = 32.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 4,446 tons
Complement:
1,584 - 2,060
Cost:
£13.757 million / $55.029 million
Distribution of weights at normal displacement:
Armament: 1,813 tons, 3.9 %
Armour: 16,426 tons, 35.3 %
- Belts: 5,441 tons, 11.7 %
- Torpedo bulkhead: 949 tons, 2.0 %
- Armament: 4,039 tons, 8.7 %
- Armour Deck: 5,746 tons, 12.3 %
- Conning Tower: 251 tons, 0.5 %
Machinery: 5,540 tons, 11.9 %
Hull, fittings & equipment: 18,655 tons, 40.1 %
Fuel, ammunition & stores: 4,136 tons, 8.9 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
68,956 lbs / 31,278 Kg = 40.9 x 15.0 " / 381 mm shells or 10.0 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 5.6 ft / 1.7 m
Roll period: 19.1 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0.72
Seaboat quality (Average = 1.00): 1.08
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.539
Length to Beam Ratio: 7.41 : 1
'Natural speed' for length: 32.93 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: 33.00 ft / 10.06 m
- Forecastle (20 %): 28.00 ft / 8.53 m
- Mid (0 %): 27.00 ft / 8.23 m
- Quarterdeck (15 %): 27.00 ft / 8.23 m
- Stern: 27.00 ft / 8.23 m
- Average freeboard: 27.50 ft / 8.38 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.8 %
- Above water (accommodation/working, high = better): 200.5 %
Waterplane Area: 62,117 Square feet or 5,771 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 209 lbs/sq ft or 1,019 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.50
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
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.
Saturday, January 15, 2005
By trimming armor, I got my 1927 fast battleship (GB/BB/1927) to work
I had to trim armor and balloon displacement, but I was able to get 32 knots from my Vanguard-like design. It is like a Hood with better deck and side protection. The armor deck is 5in while the belt is 13in. I am pleased, as I had envisioned the full load displacement as 45,500 tons, anyway. I am trying to keep dimensions and speed, and make other compromises to achieve them, while having a good seaboat.
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