1956-1957. 256 Whiskey class submarines were built on 9 different shipyards in the Soviet Union.
Material: Steel, pressure hull thickness 25-30 mm. Max diving depth secret but said to be around 500'.
Length: 75.2 meters
Beam: 6.3 meters
Draft: 3 meters in fore, 4.8 in aft.
Displacement:
1050 tons surfaced, 1350 tons submerged. Today batteries and some other equipment is removed and the displacement today could be around 700 tonnes.
Main engine:
2 x 37-D diesels, 2000 bHp each. Diesel-electric running. Smaller 150 kW electric engines for creep drive.
Engines new 1987.
Cruising speed: Surface speed 17-18 knots. Submerged 13-14 knots.
Bunkers:
Diesel - 120 000 litres giving a range of 12-15 000 nautical miles.
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