Project 64 Delfin, Russian Fleet Submarine laid down 1941
Displacement:
923 t light; 953 t standard; 1,171 t normal; 1,346 t full load
Dimensions: Length overall / water x beam x draught
196.97 ft / 196.85 ft x 28.22 ft x 16.40 ft (normal load)
60.04 m / 60.00 m x 8.60 m x 5.00 m
Armament:
1 - 3.94" / 100 mm guns in single mounts, 37.48lbs / 17.00kg shells, 1941 Model
Dual purpose gun in deck mount
on centreline forward
1 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1941 Model
Anti-aircraft gun in deck mount
on centreline amidships
1 - 0.55" / 14.0 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1941 Model
Machine gun in deck mount
on centreline aft, 1 raised gun
Weight of broadside 39 lbs / 18 kg
Shells per gun, main battery: 300
6 - 20.9" / 530 mm submerged torpedo tubes
Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 1 shaft, 3,597 shp / 2,684 Kw = 18.00 kts
Range 29,000nm at 8.00 kts
Bunker at max displacement = 393 tons
Complement:
99 - 130
Cost:
£0.303 million / $1.211 million
Distribution of weights at normal displacement:
Armament: 4 tons, 0.3 %
Machinery: 95 tons, 8.1 %
Hull, fittings & equipment: 554 tons, 47.3 %
Fuel, ammunition & stores: 249 tons, 21.2 %
Miscellaneous weights: 270 tons, 23.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
603 lbs / 274 Kg = 19.8 x 3.9 " / 100 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 0.8 ft / 0.3 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 2 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.00
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.450
Length to Beam Ratio: 6.98 : 1
'Natural speed' for length: 14.03 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 0.33 ft / 0.10 m
- Forecastle (20 %): 0.33 ft / 0.10 m
- Mid (50 %): 0.33 ft / 0.10 m
- Quarterdeck (15 %): 0.33 ft / 0.10 m
- Stern: 0.33 ft / 0.10 m
- Average freeboard: 0.33 ft / 0.10 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.0 %
- Above water (accommodation/working, high = better): 2.1 %
Waterplane Area: 3,376 Square feet or 314 Square metres
Displacement factor (Displacement / loading): 238 %
Structure weight / hull surface area: 108 lbs/sq ft or 527 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2.84
- Longitudinal: 2.90
- Overall: 2.85
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability
Breakdown of Miscellaneous Weights:
195 tons ballast
8 tons sonar
10 tons snorkel
32 tons torpedo reloads (12 fwd, 4 aft)
25 tons mines
Range:
5,800nm @ 15 kts
10,800nm @ 12kts
17,100nm @ 10 kts
29,00nm @ 8 kts
Ships in Class:
- K-21: Built 1941
- K-22: Built 1941
- K-23: Built 1941
- K-24: Built 1941
- K-25: Built 1941
- K-26: Built 1941
- K-27: Built 1941
- K-28: Built 1941
- K-29: Built 1941
- K-30: Built 1941
- K-31: Built 1943
- K-32: Built 1943
- K-33: Built 1943
- K-34: Built 1943
- K-35: Built 1943
- K-36: Built 1943
- K-37: Built 1943
- K-38: Built 1943
- K-39: Built 1943
- K-40: Built 1943