Ger/BB/1915 Design Study E1, Germany Battleship laid down 1915
Displacement:
49,519 t light; 51,936 t standard; 55,647 t normal; 58,615 t full load
Dimensions: Length overall / water x beam x draught
681.94 ft / 680.00 ft x 120.00 ft x 36.00 ft (normal load)
207.86 m / 207.26 m x 36.58 m x 10.97 m
Armament:
12 - 16.00" / 406 mm guns (4x3 guns), 2,048.00lbs / 928.96kg shells, 1915 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts - superfiring
20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1915 Model
Quick firing guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 25,826 lbs / 11,714 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.0" / 406 mm 390.00 ft / 118.87 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 88 % of normal length
- Torpedo Bulkhead:
3.00" / 76 mm 390.00 ft / 118.87 m 32.00 ft / 9.75 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.0" / 305 mm 8.00" / 203 mm 16.0" / 406 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
- Armour deck: 8.00" / 203 mm, Conning tower: 12.00" / 305 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 99,307 shp / 74,083 Kw = 25.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 6,680 tons
Complement:
1,811 - 2,355
Cost:
£7.231 million / $28.925 million
Distribution of weights at normal displacement:
Armament: 3,228 tons, 5.8 %
Armour: 21,733 tons, 39.1 %
- Belts: 4,888 tons, 8.8 %
- Torpedo bulkhead: 1,385 tons, 2.5 %
- Armament: 5,721 tons, 10.3 %
- Armour Deck: 9,362 tons, 16.8 %
- Conning Tower: 377 tons, 0.7 %
Machinery: 3,762 tons, 6.8 %
Hull, fittings & equipment: 20,796 tons, 37.4 %
Fuel, ammunition & stores: 6,128 tons, 11.0 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
75,652 lbs / 34,315 Kg = 36.9 x 16.0 " / 406 mm shells or 12.9 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 6.7 ft / 2.0 m
Roll period: 19.5 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.80
Seaboat quality (Average = 1.00): 1.18
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.663
Length to Beam Ratio: 5.67 : 1
'Natural speed' for length: 26.08 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 48
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: 27.00 ft / 8.23 m
- Forecastle (20 %): 24.00 ft / 7.32 m
- Mid (0 %): 24.00 ft / 7.32 m
- Quarterdeck (15 %): 24.00 ft / 7.32 m
- Stern: 24.00 ft / 7.32 m
- Average freeboard: 24.24 ft / 7.39 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78.8 %
- Above water (accommodation/working, high = better): 159.7 %
Waterplane Area: 63,257 Square feet or 5,877 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 243 lbs/sq ft or 1,185 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.78
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
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Saturday, January 15, 2005
Another one of these "stubby" battleships: Ger/BB/1915 Design Study E1
I have this drawing, which I was amazed to see was to scale, for a 680ft battleship with 12-16in/45 and 20-5in QF guns. I had optimistically hoped for an 18in armor basis, but I had to settle for a 16in basis, which wasn't too bad. As usual, I almost was forced to go to a higher speed, to increase low weights to improve stability. The ship is flush-decked with a single, large funnel. There is the tower mast with surrounding bridgework, so the ship looks somewhat Italian to my eye. The bow is raked, and there are polemasts, with the formast being tall, and the mainmast being very short.
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