Ger/BB/1916 Design Study A1, Enter country Enter ship type laid down 1916
Displacement:
88,205 t light; 92,309 t standard; 98,280 t normal; 103,057 t full load
Dimensions: Length overall / water x beam x draught
903.22 ft / 900.00 ft x 150.00 ft x 35.00 ft (normal load)
275.30 m / 274.32 m x 45.72 m x 10.67 m
Armament:
10 - 21.00" / 533 mm guns (4 mounts), 4,630.50lbs / 2,100.36kg shells, 1916 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts - superfiring
24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1916 Model
Quick firing guns in turrets (on barbettes)
on side, evenly spread, all raised mounts
Weight of broadside 47,805 lbs / 21,684 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 17.0" / 432 mm 550.00 ft / 167.64 m 19.00 ft / 5.79 m
Ends: Unarmoured
Main Belt covers 94 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 17.0" / 432 mm 10.0" / 254 mm 17.0" / 432 mm
2nd: 4.00" / 102 mm 3.00" / 76 mm 4.00" / 102 mm
- Armour deck: 8.00" / 203 mm, Conning tower: 15.00" / 381 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 59,093 shp / 44,083 Kw = 20.00 kts
Range 8,500nm at 15.00 kts
Bunker at max displacement = 10,748 tons
Complement:
2,774 - 3,607
Cost:
£13.770 million / $55.080 million
Distribution of weights at normal displacement:
Armament: 5,976 tons, 6.1 %
Armour: 37,123 tons, 37.8 %
- Belts: 8,017 tons, 8.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 12,002 tons, 12.2 %
- Armour Deck: 16,416 tons, 16.7 %
- Conning Tower: 688 tons, 0.7 %
Machinery: 2,202 tons, 2.2 %
Hull, fittings & equipment: 42,904 tons, 43.7 %
Fuel, ammunition & stores: 10,075 tons, 10.3 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
190,353 lbs / 86,343 Kg = 41.1 x 21.0 " / 533 mm shells or 10.8 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 9.6 ft / 2.9 m
Roll period: 20.4 seconds
Steadiness - As gun platform (Average = 50 %): 78 %
- Recoil effect (Restricted arc if above 1.00): 0.97
Seaboat quality (Average = 1.00): 1.56
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.728
Length to Beam Ratio: 6.00 : 1
'Natural speed' for length: 30.00 kts
Power going to wave formation at top speed: 33 %
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: 35.00 ft / 10.67 m
- Forecastle (20 %): 32.00 ft / 9.75 m
- Mid (0 %): 32.00 ft / 9.75 m
- Quarterdeck (15 %): 32.00 ft / 9.75 m
- Stern: 32.00 ft / 9.75 m
- Average freeboard: 32.24 ft / 9.83 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 53.0 %
- Above water (accommodation/working, high = better): 243.7 %
Waterplane Area: 110,919 Square feet or 10,305 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 300 lbs/sq ft or 1,463 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.58
- 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.
Sunday, January 09, 2005
Not just a design study: Ger/BB/1916 B1
Apparently, I was planning to build two of these ships (Ger/BB/1916), to be laid down in August 1915, to be launched in December 1916, and completed in December 1917. These two ships were designated "AA" and "AB". I projected a third ship, "AC". These were monsters that were really too short and slow. My friend Cliff and I had thought that you could use 20 knot ships for North Sea battling. The main feature of this design was 10-21in/45 guns with a 24-5in/50 secondary armament. I had originally projected armor of 36,874 tons, but my Springsharp design has 37,123 tons. I had optimistically hoped for 80,000 tons, but the Springsharp design came out a bit larger (98,280 tons, normal).
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