Colossus, Cascadian Dreadnought laid down 1914
Units: 4
- CRS Colossus
- CRS Goliath
- CRS Titan
- CRS Sentinel
Displacement:
30,947 t light; 32,842 t standard; 35,372 t normal; 37,397 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(675.19 ft / 658.00 ft) x 97.00 ft x (29.75 / 31.20 ft)
(205.80 m / 200.56 m) x 29.57 m x (9.07 / 9.51 m)
Armament:
12 - 14.00" / 356 mm 45.0 cal guns - 1,400.00lbs / 635.03kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1914 Model
4 x 3-gun mounts on centreline ends, evenly spread
2 raised mounts - superfiring
20 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
Quick firing guns in casemate mounts, 1914 Model
20 x Single mounts on sides, evenly spread
10 hull mounts in casemates- Limited use in heavy seas
8 - 3.00" / 76.2 mm 50.0 cal guns - 14.29lbs / 6.48kg shells, 1,000 per gun
Anti-air guns in deck and hoist mounts, 1914 Model
8 x Single mounts on sides, evenly spread
Weight of broadside 19,201 lbs / 8,709 kg
Main Torpedoes
2 - 21.0" / 533 mm, 23.00 ft / 7.01 m torpedoes - 1.456 t each, 2.913 t total
submerged side tubes
2nd Torpedoes
4 - 21.0" / 533 mm, 23.00 ft / 7.01 m torpedoes - 1.456 t each, 5.825 t total
below water reloads
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 350.00 ft / 106.68 m 17.60 ft / 5.36 m
Ends: Unarmoured
Upper: 8.00" / 203 mm 350.00 ft / 106.68 m 12.00 ft / 3.66 m
Main Belt covers 82 % of normal length
- Torpedo Bulkhead - Additional damage containing bulkheads:
2.50" / 64 mm 396.00 ft / 120.70 m 28.00 ft / 8.53 m
Beam between torpedo bulkheads 78.00 ft / 23.77 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18.0" / 457 mm 6.50" / 165 mm 13.0" / 330 mm
2nd: 3.00" / 76 mm 2.00" / 51 mm 3.00" / 76 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm -
- Armoured deck - single deck:
For and Aft decks: 3.50" / 89 mm
Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm
- Conning towers: Forward 16.00" / 406 mm, Aft 4.00" / 102 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 55,051 shp / 41,068 Kw = 23.16 kts
Range 9,000nm at 13.00 kts
Bunker at max displacement = 4,555 tons
Complement:
1,289 - 1,676
Cost:
£3.896 million / $15.585 million
Distribution of weights at normal displacement:
Armament: 3,935 tons, 11.1 %
- Guns: 3,922 tons, 11.1 %
- Weapons: 13 tons, 0.0 %
Armour: 13,390 tons, 37.9 %
- Belts: 5,456 tons, 15.4 %
- Torpedo bulkhead: 1,026 tons, 2.9 %
- Armament: 3,450 tons, 9.8 %
- Armour Deck: 2,995 tons, 8.5 %
- Conning Towers: 464 tons, 1.3 %
Machinery: 2,121 tons, 6.0 %
Hull, fittings & equipment: 11,501 tons, 32.5 %
Fuel, ammunition & stores: 4,425 tons, 12.5 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
50,910 lbs / 23,092 Kg = 37.1 x 14.0 " / 356 mm shells or 7.8 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 5.5 ft / 1.7 m
Roll period: 17.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.95
Seaboat quality (Average = 1.00): 1.37
Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a round stern
Block coefficient (normal/deep): 0.652 / 0.657
Length to Beam Ratio: 6.78 : 1
'Natural speed' for length: 25.65 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 15.00 ft / 4.57 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 25.00 ft / 7.62 m, 24.00 ft / 7.32 m
- Forward deck: 30.00 %, 24.00 ft / 7.32 m, 24.00 ft / 7.32 m
- Aft deck: 40.00 %, 16.00 ft / 4.88 m, 16.00 ft / 4.88 m
- Quarter deck: 10.00 %, 16.00 ft / 4.88 m, 16.00 ft / 4.88 m
- Average freeboard: 20.08 ft / 6.12 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.0 %
- Above water (accommodation/working, high = better): 140.6 %
Waterplane Area: 48,984 Square feet or 4,551 Square metres
Displacement factor (Displacement / loading): 105 %
Structure weight / hull surface area: 200 lbs/sq ft or 977 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.41
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily