Aldebaran-class, Russian Escort Carrier laid down 1916 (Engine 1939)
Displacement:
5,831 t light; 6,033 t standard; 8,041 t normal; 9,648 t full load
Dimensions: Length overall / water x beam x draught
484.46 ft / 459.32 ft x 65.62 ft (Bulges 75.46 ft) x 14.76 ft (normal load)
147.66 m / 140.00 m x 20.00 m (Bulges 23.00 m) x 4.50 m
Armament:
2 - 5.12" / 130 mm guns in single mounts, 67.03lbs / 30.40kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on side, all aft, all raised mounts - superfiring
4 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread, 2 raised mounts - superfiring
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.55lbs / 0.70kg shells, 1939 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
4 - 0.55" / 14.0 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1939 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 211 lbs / 96 kg
Shells per gun, main battery: 300
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm 0.20" / 5 mm
2nd: 0.98" / 25 mm 0.20" / 5 mm 0.20" / 5 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 9,597 shp / 7,160 Kw = 18.00 kts
Range 32,000nm at 12.00 kts
Bunker at max displacement = 3,614 tons
Complement:
423 - 551
Cost:
£0.430 million / $1.719 million
Distribution of weights at normal displacement:
Armament: 26 tons, 0.3 %
Armour: 8 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 8 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 260 tons, 3.2 %
Hull, fittings & equipment: 3,037 tons, 37.8 %
Fuel, ammunition & stores: 2,210 tons, 27.5 %
Miscellaneous weights: 2,500 tons, 31.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21,322 lbs / 9,671 Kg = 318.1 x 5.1 " / 130 mm shells or 4.1 torpedoes
Stability (Unstable if below 1.00): 1.32
Metacentric height 4.4 ft / 1.3 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 1.94
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.550
Length to Beam Ratio: 6.09 : 1
'Natural speed' for length: 21.43 kts
Power going to wave formation at top speed: 38 %
Trim (Max stability = 0, Max steadiness = 100): 36
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.81 ft / 10.00 m
- Forecastle (25 %): 32.81 ft / 10.00 m (16.40 ft / 5.00 m aft of break)
- Mid (50 %): 16.40 ft / 5.00 m
- Quarterdeck (15 %): 16.40 ft / 5.00 m
- Stern: 16.40 ft / 5.00 m
- Average freeboard: 20.51 ft / 6.25 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 48.3 %
- Above water (accommodation/working, high = better): 155.4 %
Waterplane Area: 21,034 Square feet or 1,954 Square metres
Displacement factor (Displacement / loading): 248 %
Structure weight / hull surface area: 97 lbs/sq ft or 471 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.14
- Longitudinal: 1.89
- Overall: 1.20
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
1,400 tons internal fuel for 12,000nm @ 12 kts, 600 tons AVGAS, 400 tons bombs/torpedos, 1,500 tons misc space for workshops, electronics, catapults, elevators, 1,600 tons fuel for corvettes.
Radars:
Surface Search
Air Search
Antiaircraft fire control
Aviation:
12 Fighters, 8 Torpedo Bombers, 4 Scouts, 2 Catapults, 1 elevator
Ships in Class:
- Orion: Laid down 1916, converted 1939
- Castor: Laid down 1916, converted 1940