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The Christie M1931, known as the Combat Car, T1 in US Cavalry use and Medium Tank, Convertible, T3 in Infantry branch, was a wheel-to-track tank designed by J. Walter Christie for the United States Army using Christie's ideas of an aero-engine and the novel Christie suspension to give high mobility.
203 mm howitzer M1931 (B-4) (Russian: 203-мм гаубица обр. 1931 г. (Б-4), GRAU index: 52-G-625) was a 203 mm (8 inch) Soviet high-power heavy howitzer. During the Second World War, it was under the command of the Stavka's strategic reserve. It was nicknamed "Stalin's sledgehammer" by German soldiers.
This led to an upgrade of the M1931, handled also by Petrov's design bureau. The barrel of the M1931 was placed on the carriage of a ML-20. The improved gun successfully underwent trials in September–October 1938 and on 29 April 1939 was adopted as 122 mm corps gun M1931/37. Unusually, the new variant, like the old one, was referred to as A-19.
Christie-derived suspension on Polish 10TP tank: roadwheel (1), spring (2) and arm (3) T3E2 tank with Christie suspension crossing an obstacle during tests in 1936 The Christie suspension is a suspension system developed by American engineer J. Walter Christie for his tank designs.
John Walter Christie (May 6, 1865 – January 11, 1944) was an American engineer and inventor. [1] He is known best for developing the Christie suspension system used for several World War II-era tank designs, most notably the Soviet BT and T-34 [3] tanks series, and the United Kingdom Covenanter and Crusader Cruiser tanks, as well as the Comet heavy cruiser tank.
The Vickers-Carden-Loyd light amphibious tank (designated the A4E11 and A4E12 by the War Office), [1] was a series of British experimental pre-World War II light tanks (resembling tankettes), which, although not taken into British service, were sold to a number of other countries which produced modified versions which were then taken into service.
122 mm corps gun M1931 (A-19) (Russian: 122-мм корпусная пушка обр. 1931 г. (А-19) ) was a Soviet field gun, developed in the late 1920s and early 1930s. In 1939 the gun was replaced in production by an improved variant, M1931/37 .
Carden Loyd M1931 amphibious tank (29) - purchased in 1935. Carden Loyd M1936 (4) - Light two-man tank, purchased in 1936. Renault FT (100+) - purchased from Poland & France in 1920s & 1930s. Panzer I (10) - purchased from Germany in 1930s. T-26 (88) - Licensed copy of British Vickers 6-ton Tank, purchased from Soviets in 1938. Vickers 6-ton ...