GB/BB/1902 Lighly Armed, Great Britain Battleship laid down 1902
Displacement:
13,513 t light; 14,055 t standard; 15,961 t normal; 17,485 t full load
Dimensions: Length overall / water x beam x draught
490.00 ft / 490.00 ft x 78.00 ft x 24.00 ft (normal load)
149.35 m / 149.35 m x 23.77 m x 7.32 m
Armament:
4 - 10.00" / 254 mm guns (2x2 guns), 500.00lbs / 226.80kg shells, 1902 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1902 Model
Quick firing guns in casemate mounts
on side, all amidships
12 guns in hull casemates - Limited use in heavy seas
Weight of broadside 3,728 lbs / 1,691 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m
Ends: 5.00" / 127 mm 120.00 ft / 36.58 m 8.00 ft / 2.44 m
Upper: 5.00" / 127 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m
Main Belt covers 116 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.50" / 38 mm 370.00 ft / 112.78 m 24.00 ft / 7.32 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.50" / 241 mm 6.00" / 152 mm 9.50" / 241 mm
2nd: 5.00" / 127 mm 5.00" / 127 mm 5.00" / 127 mm
- Armour deck: 1.50" / 38 mm, Conning tower: 9.50" / 241 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 30,225 ihp / 22,548 Kw = 22.00 kts
Range 4,200nm at 15.00 kts
Bunker at max displacement = 3,430 tons (100% coal)
Complement:
709 - 923
Cost:
£1.506 million / $6.022 million
Distribution of weights at normal displacement:
Armament: 466 tons, 2.9 %
Armour: 3,820 tons, 23.9 %
- Belts: 1,558 tons, 9.8 %
- Torpedo bulkhead: 493 tons, 3.1 %
- Armament: 857 tons, 5.4 %
- Armour Deck: 782 tons, 4.9 %
- Conning Tower: 130 tons, 0.8 %
Machinery: 4,580 tons, 28.7 %
Hull, fittings & equipment: 4,647 tons, 29.1 %
Fuel, ammunition & stores: 2,448 tons, 15.3 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,027 lbs / 6,362 Kg = 28.1 x 10.0 " / 254 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.49
Metacentric height 6.8 ft / 2.1 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.50
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.609
Length to Beam Ratio: 6.28 : 1
'Natural speed' for length: 22.14 kts
Power going to wave formation at top speed: 51 %
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: 22.00 ft / 6.71 m
- Forecastle (20 %): 18.00 ft / 5.49 m
- Mid (50 %): 18.00 ft / 5.49 m
- Quarterdeck (15 %): 18.00 ft / 5.49 m
- Stern: 18.00 ft / 5.49 m
- Average freeboard: 18.32 ft / 5.58 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 154.7 %
- Above water (accommodation/working, high = better): 136.3 %
Waterplane Area: 28,189 Square feet or 2,619 Square metres
Displacement factor (Displacement / loading): 96 %
Structure weight / hull surface area: 116 lbs/sq ft or 568 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.58
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
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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Sunday, October 15, 2006
The lightly-armed battleship design from 1902
Along with the heavily-armed battleship design from the senior officers' course in 1902, John Roberts has a less complete description of the lightly-armed battleship design, which was the alternative to the former. Naturally, I wanted to try that ship in Springsharp, as well. I had less to go on, but I made an attempt, anyway. This is the Springsharp report:
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