Partial coal firing desired because of high coal availability in the Far North.
Russian Icebreaker laid down 1940
Displacement:
28,832 t light; 29,618 t standard; 39,337 t normal; 47,111 t full load
Dimensions: Length overall / water x beam x draught
733.61 ft / 721.78 ft x 117.45 ft x 29.53 ft (normal load)
223.60 m / 220.00 m x 35.80 m x 9.00 m
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 557.74 ft / 170.00 m 32.81 ft / 10.00 m
Ends: 3.94" / 100 mm 164.04 ft / 50.00 m 32.81 ft / 10.00 m
Main Belt covers 119 % of normal length
- Torpedo Bulkhead:
2.36" / 60 mm 557.74 ft / 170.00 m 29.53 ft / 9.00 m
Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 4 shafts, 107,239 shp / 80,000 Kw = 27.38 kts
Range 16,000nm at 20.00 kts
Bunker at max displacement = 17,493 tons (50% coal)
Complement:
1,396 - 1,815
Cost:
£8.578 million / $34.312 million
Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 3,737 tons, 9.5 %
- Belts: 2,298 tons, 5.8 %
- Torpedo bulkhead: 1,439 tons, 3.7 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 3,004 tons, 7.6 %
Hull, fittings & equipment: 15,091 tons, 38.4 %
Fuel, ammunition & stores: 10,505 tons, 26.7 %
Miscellaneous weights: 7,000 tons, 17.8 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
96,546 lbs / 43,792 Kg = 893.9 x 6 " / 152 mm shells or 22.4 torpedoes
Stability (Unstable if below 1.00): 1.44
Metacentric height 11.9 ft / 3.6 m
Roll period: 14.3 seconds
Steadiness - As gun platform (Average = 50 %): 56 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.550
Length to Beam Ratio: 6.15 : 1
'Natural speed' for length: 26.87 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.48 ft / 9.90 m
- Forecastle (20 %): 24.28 ft / 7.40 m
- Mid (50 %): 24.28 ft / 7.40 m (16.40 ft / 5.00 m aft of break)
- Quarterdeck (15 %): 16.40 ft / 5.00 m
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 21.12 ft / 6.44 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 54.8 %
- Above water (accommodation/working, high = better): 161.8 %
Waterplane Area: 59,165 Square feet or 5,497 Square metres
Displacement factor (Displacement / loading): 235 %
Structure weight / hull surface area: 196 lbs/sq ft or 957 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.50
- Longitudinal: 1.52
- Overall: 1.50
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
7,000 tons allocated for rescue equipment, scout aircraft, and emergency supplies.
Speed is modified to produce the desired engine power and hull stress. Actual top speed is 20 kts. Actual seakeeping/stability at 20 kts is 1.48/1.40