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
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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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