Submarines of the Shch (Pike) type V-bis-2 series (14 units) began to enter the fleets in the period 1935-193.
The project was developed by a design bureau led by B.M. Malinin. The new series of boats of the "Sch" type had a number of significant differences. Once again, the theoretical drawing and the shape of the cabin were revised, which increased the surface speed by 0.5 knots and improved seaworthiness. The aft bulkhead of the second compartment was made stepped - this made it possible to store the torpedoes assembled. The torpedo-loading device was redone, which accelerated the time of equipping the boat. The bulkheads of the central bridge were reinforced (now they could withstand a pressure of 6 kg / cm). The main ballast tanks were adapted to receive additional fuel. The transmission of the electric motor of the economic course was changed from a six-wheel to a belt one, which made its operation silent. The electric motors of the bow and stern horizontal rudders were moved to the end compartments, leaving only manual control to the central post. The system for blowing the main ballast with diesel engines operating as a compressor has become standard. Part of the submarines received Som net cutters. Thanks to the introduction of these innovations, the boats of the V-bis-2 series have earned high praise from sailors.
TACTICAL - TECHNICAL CHARACTERISTICS
Displacement surface / underwater 593 t / 708 t
Length 58.8 m
Full surface speed 12.3 knots
Full speed underwater 8.5 knots
Operating depth 75m
Crew 40 people
Armament: 4x533mm bow and 2x533 stern torpedo tubes, 10 torpedoes, 2 gun mounts of 45mm caliber (1000 rounds)