F/CA/1917 Fast, France Armoured Cruiser laid down 1917 (Engine 1950)
Displacement:
17,425 t light; 18,072 t standard; 18,980 t normal; 19,706 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(737.73 ft / 730.00 ft) x 80.00 ft x (25.00 / 25.68 ft)
(224.86 m / 222.50 m) x 24.38 m x (7.62 / 7.83 m)
Armament:
6 - 11.00" / 279 mm 45.0 cal guns - 670.00lbs / 303.91kg shells, 90 per gun
Breech loading guns in turret on barbette mounts, 1917 Model
2 x Triple mounts on centreline, forward deck forward
8 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
Quick firing guns in deck and hoist mounts, 1917 Model
8 x Single mounts on sides, forward deck aft
Weight of broadside 4,820 lbs / 2,186 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 400.00 ft / 121.92 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 84 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.00" / 25 mm 400.00 ft / 121.92 m 25.00 ft / 7.62 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 3.00" / 76 mm 5.00" / 127 mm
2nd: 3.00" / 76 mm 2.00" / 51 mm 3.00" / 76 mm
- Armoured deck - multiple decks: 2.00" / 51 mm For and Aft decks
Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm
- Conning towers: Forward 5.00" / 127 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 205,154 shp / 153,045 Kw = 37.00 kts
Range 5,400nm at 15.00 kts
Bunker at max displacement = 1,634 tons
Complement:
808 - 1,051
Cost:
£3.217 million / $12.867 million
Distribution of weights at normal displacement:
Armament: 1,002 tons, 5.3 %
Armour: 3,473 tons, 18.3 %
- Belts: 1,022 tons, 5.4 %
- Torpedo bulkhead: 370 tons, 1.9 %
- Armament: 611 tons, 3.2 %
- Armour Deck: 1,395 tons, 7.3 %
- Conning Tower: 77 tons, 0.4 %
Machinery: 4,908 tons, 25.9 %
Hull, fittings & equipment: 8,041 tons, 42.4 %
Fuel, ammunition & stores: 1,555 tons, 8.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21,381 lbs / 9,698 Kg = 32.1 x 11.0 " / 279 mm shells or 2.7 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 5.0 ft / 1.5 m
Roll period: 15.1 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak,
an extended bulbous bow and a round stern
Block coefficient (normal/deep): 0.455 / 0.460
Length to Beam Ratio: 9.13 : 1
'Natural speed' for length: 27.02 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 14.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 31.00 ft / 9.45 m, 26.00 ft / 7.92 m
- Forward deck: 42.00 %, 26.00 ft / 7.92 m, 26.00 ft / 7.92 m
- Aft deck: 18.00 %, 18.00 ft / 5.49 m, 18.00 ft / 5.49 m
- Quarter deck: 15.00 %, 18.00 ft / 5.49 m, 18.00 ft / 5.49 m
- Average freeboard: 23.86 ft / 7.27 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 141.8 %
- Above water (accommodation/working, high = better): 208.1 %
Waterplane Area: 37,405 Square feet or 3,475 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 146 lbs/sq ft or 714 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.49
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
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, November 04, 2007
How about a very fast F/CA/1917 design study?
I have a rather cool looking sketch of a version of the F/CA/1917 with 6-11in guns. I thought it might work to have a higher speed, like 37 knots. I tried it out and have this Springsharp report:
No comments:
Post a Comment