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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.
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.
The Christie suspension is a suspension system developed by American engineer J. Walter Christie for his tank designs. It allowed considerably longer movement than conventional leaf spring systems then in common use, which allowed his tanks to have considerably greater cross-country speed.
Christie used the experience gained before and during World War I to develop his "Convertible Suspension", which allowed a vehicle to run on either tracks or wheels. Most tanks of the time period weren't durable enough to be drive to the front on their own, so instead were delivered by trucks and then driven to where they were needed.
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 ]
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 .
Both were Soviet developments of foreign designs from the early 1930s: the T-26 was based on the British Vickers 6-Ton, and the BT tanks were based on a design from American engineer J. Walter Christie. [13] BT-7, A-20, T-34 (model 1940), and T-34 (model 1941)
The following team was chosen to represent America: Joseph Tracy (90-hp. Locomobile), Hubert LeBlon (115-hp. Thomas), H.N. Harding (50-hp. Haynes), Frank Lawell (110-hp. Frayer-Miller), and J. Walter Christie (50-hp. Christie). "Only the first three covered the full course, and Lawell and Christie were given places on the team; the former ...