Cressy class, Great Britain Armoured Cruiser laid down 1911 (Engine 1914)
Displacement:
9,675 t light; 10,080 t standard; 12,000 t normal; 13,536 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(477.48 ft / 472.00 ft) x 69.00 ft x (26.00 / 28.49 ft)
(145.54 m / 143.87 m) x 21.03 m x (7.92 / 8.68 m)
Armament:
2 - 9.20" / 234 mm 45.0 cal guns - 392.66lbs / 178.11kg shells, 150 per gun
Breech loading guns in turret on barbette mount , 1911 Model
1 x Twin mount on centreline, forward deck forward
12 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
Quick firing guns in turret on barbette mounts , 1911 Model
2 x Triple mounts on centreline ends, evenly spread
1 raised mount - superfiring
2 x Triple mounts on sides, forward deck aft
Weight of broadside 1,985 lbs / 1,985 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 300.00 ft / 91.44 m 16.00 ft / 4.88 m
Ends: 4.00" / 102 mm 172.00 ft / 52.43 m 16.00 ft / 4.88 m
Main Belt covers 98 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.00" / 25 mm 300.00 ft / 91.44 m 26.00 ft / 7.92 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 4.00" / 102 mm 6.00" / 152 mm
2nd: 5.00" / 127 mm 4.00" / 102 mm 5.00" / 127 mm
- Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 34,142 ihp / 25,470 Kw = 24.00 kts
Range 6,200nm at 15.00 kts
Bunker at max displacement = 3,455 tons (100% coal)
Complement:
573 - 745
Cost:
£0.850 million / $3.400 million
Distribution of weights at normal displacement:
Armament: 473 tons, 3.9 %
Armour: 3,399 tons, 28.3 %
- Belts: 1,655 tons, 13.8 %
- Torpedo bulkhead: 289 tons, 2.4 %
- Armament: 588 tons, 4.9 %
- Armour Deck: 800 tons, 6.7 %
- Conning Tower: 68 tons, 0.6 %
Machinery: 2,246 tons, 18.7 %
Hull, fittings & equipment: 3,795 tons, 31.6 %
Fuel, ammunition & stores: 2,325 tons, 19.4 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16,829 lbs / 7,633 Kg = 43.2 x 9.2 " / 234 mm shells or 2.9 torpedoes
Stability (Unstable if below 1.00): 1.30
Metacentric height 4.6 ft / 1.4 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 65 %
- Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality (Average = 1.00): 1.29
Hull form characteristics:
Hull has a flush deck,
a normal bow and a round stern
Block coefficient (normal/deep): 0.496 / 0.511
Length to Beam Ratio: 6.84 : 1
'Natural speed' for length: 21.73 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 9.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 22.00 ft / 6.71 m, 18.00 ft / 5.49 m
- Forward deck: 30.00 %, 18.00 ft / 5.49 m, 17.00 ft / 5.18 m
- Aft deck: 35.00 %, 17.00 ft / 5.18 m, 17.00 ft / 5.18 m
- Quarter deck: 15.00 %, 17.00 ft / 5.18 m, 18.00 ft / 5.49 m
- Average freeboard: 17.75 ft / 5.41 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 107.9 %
- Above water (accommodation/working, high = better): 123.8 %
Waterplane Area: 21,621 Square feet or 2,009 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 113 lbs/sq ft or 551 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.88
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily


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