Pluton, France Armored Cruiser laid down 1905
Displacement:
10,411 t light; 10,837 t standard; 12,292 t normal; 13,455 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(492.13 ft / 492.13 ft) x 62.34 ft x (27.23 / 29.20 ft)
(150.00 m / 150.00 m) x 19.00 m x (8.30 / 8.90 m)
Armament:
8 - 7.64" / 194 mm 50.0 cal guns - 235.84lbs / 106.98kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1905 Model
4 x Twin mounts on centreline, evenly spread
2 raised mounts
16 - 2.56" / 65.0 mm 50.0 cal guns - 8.87lbs / 4.02kg shells, 300 per gun
Breech loading guns in deck mounts, 1905 Model
16 x Single mounts on sides, evenly spread
4 - 0.30" / 7.5 mm 70.0 cal guns - 0.01lbs / 0.01kg shells, 2,000 per gun
Machine guns in deck mounts, 1905 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 2,029 lbs / 920 kg
Main Torpedoes
2 - 17.7" / 450 mm, 19.69 ft / 6.00 m torpedoes - 0.827 t each, 1.655 t total
submerged bow tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 295.28 ft / 90.00 m 9.71 ft / 2.96 m
Ends: 2.76" / 70 mm 196.85 ft / 60.00 m 9.71 ft / 2.96 m
Upper: 1.57" / 40 mm 295.28 ft / 90.00 m 8.01 ft / 2.44 m
Main Belt covers 92 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7.87" / 200 mm 4.72" / 120 mm 3.54" / 90 mm
2nd: 0.98" / 25 mm - -
- Armoured deck - multiple decks:
For and Aft decks: 2.56" / 65 mm
Forecastle: 1.38" / 35 mm Quarter deck: 1.38" / 35 mm
- Conning towers: Forward 2.95" / 75 mm, Aft 2.95" / 75 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 3 shafts, 28,697 ihp / 21,408 Kw = 23.00 kts
Range 10,000nm at 10.00 kts
Bunker at max displacement = 2,618 tons (100% coal)
Complement:
583 - 758
Cost:
£1.152 million / $4.607 million
Distribution of weights at normal displacement:
Armament: 502 tons, 4.1 %
- Guns: 499 tons, 4.1 %
- Weapons: 3 tons, 0.0 %
Armour: 2,474 tons, 20.1 %
- Belts: 1,079 tons, 8.8 %
- Armament: 423 tons, 3.4 %
- Armour Deck: 904 tons, 7.4 %
- Conning Towers: 68 tons, 0.6 %
Machinery: 4,159 tons, 33.8 %
Hull, fittings & equipment: 3,256 tons, 26.5 %
Fuel, ammunition & stores: 1,881 tons, 15.3 %
Miscellaneous weights: 20 tons, 0.2 %
- Hull below water: 20 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,760 lbs / 3,520 Kg = 34.8 x 7.6 " / 194 mm shells or 1.8 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 4.2 ft / 1.3 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.31
Seaboat quality (Average = 1.00): 1.35
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.515 / 0.526
Length to Beam Ratio: 7.89 : 1
'Natural speed' for length: 22.18 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 38
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 21.33 ft / 6.50 m, 18.04 ft / 5.50 m
- Forward deck: 30.00 %, 18.04 ft / 5.50 m, 14.11 ft / 4.30 m
- Aft deck: 35.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m
- Quarter deck: 15.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m
- Average freeboard: 15.75 ft / 4.80 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 125.8 %
- Above water (accommodation/working, high = better): 101.7 %
Waterplane Area: 20,722 Square feet or 1,925 Square metres
Displacement factor (Displacement / loading): 96 %
Structure weight / hull surface area: 105 lbs/sq ft or 513 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.53
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Adequate accommodation and workspace room
Good seaboat, rides out heavy weather easily