Kharkiv model V-2

The Kharkiv model V-2 (В-2, German Transliteration: W-2) was a Soviet diesel tank V-12 engine designed at the Kharkiv Locomotive Factory by Konstantin Chelpan and his team. It is found in the BT-7M (BT-8), T-34, KV, IS and IS-10 (T-10) tanks, and by extension, the vehicles based on them, such as the SU-85 and SU-100 tank destroyers based on the T-34 and the ISU-122 and ISU-152 self-propelled guns based on the IS-2. Throughout its production life, output ranged from roughly 450-700 hp.

Displacement 38.8 L, bore 150 mm, stroke 180 mm left cylinder group and 186 mm right cylinder group, torque 220 kgf.

Variants

 * V-2: Initial production version, 1937. Used in the BT-7M (BT-8).
 * V-2-34: V-2 with revised hull mounts, fuel and cooling connectors and refined clutch, 1939. Used in the T-34, SU-85 and SU-100. It produced 500 hp @ 1800 RPM.
 * V-2K: V-2 with increased injection pressure and higher engine speed, 1939. Used in the KV-1 and KV-2. It produced 600 hp.
 * V-2V: V-2 detuned for use in lighter vehicles, 1940. Used in the Voroshilovets artillery tractor. It produced 375 hp.
 * V-2L/P: V-2 modified for boats, not built.
 * V-2SN (Нагнетатель системы, supercharger systems): V-2 with a supercharger from the Mikulin AM-38 aircraft engine, 1940. Used in the KV-3. It produced 862 hp.
 * V-2-10 (V-2IS): V-2 with stronger cylinders and heads, improved fuel pump, larger radiator and oil cooler and modified hull mounts, 1943. Used in the IS-2, ISU-122 and ISU-152, and T-10. It produced 520 hp.
 * V-2-450AV-S3: V-2 modified for oil drilling equipment. It produced 450 hp.