BT-5

BT-5 light tank
A surviving BT-5 at the Breakthrough of the Siege of Lenningrad Museum
Type	Light tank.
Service history
In service	1933-1945
Used by	Soviet Union Spanish Republic  Republic of China  Finland (captured) Francoist Spain (captured)
Wars	Spanish Civil War Second Sino–Japanese War Soviet–Japanese border conflicts Invasion of Poland Winter War World War II Continuation War
Production history
Designer	J. Walter Christie, Kharkiv Morozov Machine Building Design Bureau (KMDB)
Designed	1930-1931
Manufacturer	Malyshev Factory
Produced	1933-1935
No. built	1804-2108
Specifications
Mass	11.5 t
Length	5.58 m
Width	2.23 m
Height	2.25 m
Crew	3 commander/gunner loader and driver
Armor	6-13 mm
Main armament	45 mm 20-K cannon
Secondary armament	Coaxial 7.62mm DT machine gun
Engine	M-5 400 hp
Power/weight	35hp/t
Suspension	Christie
Fuel capacity	360 L gasoline
Maximum speed	72 km/h (45 mph)

The BT-5 ("Bystrochidij Takov" or "Fast Tank type 5") was the second tank in the Soviet BT series of tanks. The BT-5 improved on the previous BT-2, such as a new turret fitted with a 45 mm anti-tank gun that was also used on the T-26 and the BT-5's younger brother, the BT-7.^[1][2] The BT-5 would enter service in 1933, with the Red Army first seeing action with the Second Spanish Republic in the Spanish Civil War in 1937 until the end of World War 2, with between 1884 and 2108 units being produced with production of the tank beginning in March 1933 with production ending in 1935.^[3][4]