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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.
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.
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.
Christie revised the design and debuted the M.1921 a year later. The M.1921 had added suspension and the turret was removed and the guns placed within the hull instead, but it was also rejected on the grounds of being unreliable and under-powered. [1] Tests of the M.1921 continued until July 1924 [2] Going up and down 45º and 35º slopes.
The BT tanks were "convertible tanks". This was a feature that was designed by J. Walter Christie to reduce wear of the unreliable tank tracks of the 1930s. In about thirty minutes, the crew could remove the tracks and engage a chain drive to the rearmost road wheel on each side, allowing the tank to travel at very high speeds on roads.
The Front Drive Motor Company was an American manufacturer of commercial vehicles founded in 1912 by J. Walter Christie. [1] [2] There was no connection to the Front Drive Motor Company of the same name from Missouri.
The M22 Locust, officially Light Tank (Airborne), M22, was an American-designed airborne light tank which was produced during World War II.The Locust began development in 1941 after the British War Office requested that the American government design a purpose-built airborne light tank which could be transported by glider into battle to support British airborne forces.
The Christie Direct Action Motor Car Company was a New York City-based automobile manufacturer. It was founded by race driver and inventor J. Walter Christie in 1904, and lasted until 1910. [ 1 ] [ 2 ]