GB/BB/1909, Great Britain Battleship laid down 1909
Displacement:
25,453 t light; 26,424 t standard; 29,000 t normal; 31,061 t full load
Dimensions: Length overall / water x beam x draught
650.00 ft / 650.00 ft x 100.00 ft x 28.00 ft (normal load)
198.12 m / 198.12 m x 30.48 m x 8.53 m
Armament:
9 - 12.00" / 305 mm guns (3x3 guns), 864.00lbs / 391.90kg shells, 1909 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread, 1 raised mount
Aft Main mounts separated by engine room
8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1909 Model
Quick firing guns in casemate mounts
on side, all amidships, 2 raised mounts - superfiring
Weight of broadside 8,640 lbs / 3,919 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 360.00 ft / 109.73 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 85 % of normal length
- Torpedo Bulkhead:
2.00" / 51 mm 360.00 ft / 109.73 m 27.00 ft / 8.23 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.0" / 356 mm 10.0" / 254 mm 14.0" / 356 mm
2nd: 6.00" / 152 mm 6.00" / 152 mm 6.00" / 152 mm
- Armour deck: 3.50" / 89 mm, Conning tower: 14.00" / 356 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 54,707 shp / 40,811 Kw = 24.00 kts
Range 6,000nm at 15.00 kts
Bunker at max displacement = 4,637 tons
Complement:
1,110 - 1,444
Cost:
£2.146 million / $8.585 million
Distribution of weights at normal displacement:
Armament: 1,080 tons, 3.7 %
Armour: 10,678 tons, 36.8 %
- Belts: 3,875 tons, 13.4 %
- Torpedo bulkhead: 719 tons, 2.5 %
- Armament: 2,840 tons, 9.8 %
- Armour Deck: 2,959 tons, 10.2 %
- Conning Tower: 285 tons, 1.0 %
Machinery: 2,487 tons, 8.6 %
Hull, fittings & equipment: 11,209 tons, 38.7 %
Fuel, ammunition & stores: 3,547 tons, 12.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
58,617 lbs / 26,588 Kg = 67.8 x 12.0 " / 305 mm shells or 10.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 6.2 ft / 1.9 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 91 %
- Recoil effect (Restricted arc if above 1.00): 0.59
Seaboat quality (Average = 1.00): 1.82
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.558
Length to Beam Ratio: 6.50 : 1
'Natural speed' for length: 25.50 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -2.00 degrees
Stern overhang: -1.00 ft / -0.30 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 m
- Forecastle (20 %): 28.00 ft / 8.53 m
- Mid (66 %): 28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
- Quarterdeck (15 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 25.52 ft / 7.78 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 70.4 %
- Above water (accommodation/working, high = better): 201.2 %
Waterplane Area: 45,691 Square feet or 4,245 Square metres
Displacement factor (Displacement / loading): 119 %
Structure weight / hull surface area: 172 lbs/sq ft or 839 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.85
- 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
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.
Thursday, September 22, 2005
The August 2001 version of the GB/BB/1909 design
The GB/BB/1909 design has 9-12in/50 BLR and 8-6in QF guns. I assumed that the armor basis was 14in, and started with a 23-knot speed, although I increased the speed to 24 knots, since there was room to grow. The dimensions are 650ft x 100ft x 28ft, with a normal displacement of 29,000 tons. Since Springsharp allowed for growth in the design, I increased the range to 6,000 nm, as well as increasing the speed to 24 knots. I left the armored citadel lenght the same as the drawing, even though Springsharp complains that it is too short. This is the Srpingsharp report:
No comments:
Post a Comment