Leichttraktor Vs.Kfz.31 (Versuchs Kampffahrzeug 31)
Rheinmetall variant
Type	Light tank
Place of origin	Weimar Republic
Service history
In service	1930–1945
Used by	Weimar Republic Nazi Germany
Wars	World War II (Training only)
Production history
Designed	1929–1933
Manufacturer	Krupp, Rheinmetall
Produced	1930
No. built	4
Specifications
Mass	Krupp: 8.7 tonnes (9.6 short tons; 8.6 long tons) Rheinmetall: 8.96 tonnes (9.88 short tons; 8.82 long tons)
Length	Krupp: 4.35 m (14 ft 3 in) Rheinmetall: 4.21 m (13 ft 10 in)
Width	Krupp: 2.37 m (7 ft 9 in) Rheinmetall: 2.26 m (7 ft 5 in)
Height	Krupp: 2.35 m (7 ft 9 in) Rheinmetall:2.27 m (7 ft 5 in)
Crew	4 (commander, driver, radio operator, and loader)
Armor	Krupp: top frontal 14 mm, bottom frontal 19 mm, sides 8 + 6 mm, back 14 mm, bottom 5 mm, bonnet 6 mm, front slanting wall of turret 5 mm, turret sides 14 mm, turret rear 14 mm, turret top 5 mm, cupola 14 mm. Turret appears to be 14 mm all around. [1] Rheinmetall: 14 mm frontal
Main armament	3.7 cm KwK L/45
Secondary armament	7.92×57mm Mauser Dreyse machine gun, cloth belt drum magazine (100 rounds) supply.
Engine	Daimler-Benz M36 six-cylinder liquid-cooled gasoline engine. 100 hp (75 kW)
Suspension	Krupp: Coil spring Rheinmetall: Leaf spring
Operational range	137 km (85 mi) on-road
Maximum speed	30 km/h (19 mph)

The Leichttraktor (Vs.Kfz.31) was a German experimental tank designed during the Interwar Period.

The Leichttraktor was a German experimental tank. After the end of World War I, Germany was restricted in military development by the Treaty of Versailles. However, it was developed in a secret program under the cover name "Traktor". Its engine was mounted inside the front portion of the hull and the turret was mounted above the fighting compartment in the rear of the tank. Both Rheinmetall and Krupp produced prototypes, and in 1928, Rheinmetall's design was chosen and was awarded an order for 289 tanks. However, some time later, the order was cancelled.^[2] Krupp models had coil spring suspensions, while Rheinmetall had leaf spring suspensions.

The Germans tested the tank in the Soviet Union under the Treaty of Rapallo – agreed between the USSR and Germany in 1922 under high secrecy and security. The testing facility used from 1926 to 1933 was named Panzertruppenschule Kama, located near Kazan in the Soviet Union. The location was a joint testing ground and tank training ground for the Red Army and Reichswehr. It was codenamed "Kama" from the words Kazan and Malbrandt because the testing grounds were near Kazan and Oberstleutnant Malbrandt was assigned to select the location for testing.^[3]

Leichter Traktor ("Light tractor") was a cover name for all three medium tank designs produced there.^[4] In the early years of World War II it was used as a training tank. Although these designs were not used in actual warfare, they gave a good intuition on how to build tanks when Germany had previously only made one official tank, the A7V, and this design led to the creation of the Panzer I. ^[5]

• Peter Chamberlain & Hilary Doyle (1999). Sterling (ed.). Encyclopedia of German Tanks of World War Two. Arms & Armour. ISBN 1854095188.
• Higgins, David R. (2015). Panzer II vs 7TP: Poland 1939. Oxford: Osprey. ISBN 9781472808820.

• Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
• German Tanks and Armoured Vehicles 1914 - 1945, B. T. White, 1966