Christie M1931: Difference between revisions
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==Development== |
==Development== |
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The Christie M.1931 originated as the [[Christie M1928|M1928]] which used Christie's suspension and had the ability to run on either its tracks or the wheels. When the M1928 was demonstrated unofficially to the US Army by traversing a route at an average speed of {{convert|45| kph|abbr=on}}; by contrast the US Army's [[T1 Light Tank|T1E1 tanks]] - expected to replace their WWI-era [[M1917 light tank]]s - averaged {{convert|16| kph|abbr=on}} over the same route. This prompted sufficient interest to properly consider Christie's ideas |
The Christie M.1931 originated as the [[Christie M1928|M1928]] which used Christie's suspension and had the ability to run on either its tracks or the wheels. When the M1928 was demonstrated unofficially to the US Army by traversing a route at an average speed of {{convert|45| kph|abbr=on}}; by contrast the US Army's [[T1 Light Tank|T1E1 tanks]] - expected to replace their WWI-era [[M1917 light tank]]s - averaged {{convert|16| kph|abbr=on}} over the same route. This prompted sufficient interest to properly consider Christie's ideas. |
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In 1930, after protracted negotiations, a contract was signed with Christie's US Wheel Track Layer Corporation to build an improved version of the M1928 at a cost of $55,000. |
In 1930, after protracted negotiations, a contract was signed with Christie's US Wheel Track Layer Corporation to build an improved version of the M1928 at a cost of $55,000. |
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The prototype M1931, without a was delivered in March 1931. An order for seven more was placed in June; these were delivered by 1932. Initially officially designated as "Convertible Medium Tank T3", four were passed to the |
The prototype M1931, without a was delivered in March 1931. An order for seven more was placed in June; these were delivered by 1932. Initially officially designated as "Convertible Medium Tank T3", four were passed to [[United States Cavalry|the Cavalry]]. With the gun replaced by a [[heavy machine gun]] they were renamed "Combat Car T1".{{efn|The Cavalry were not allowed - by the [[National Defense Act of 1920]] - to possess "tanks" which were defined as limited to the Infantry, so the renaming was a way to circumvent the demarcation}} <ref>Hunnicutt p23-24</ref> The prototype was returned to Christie. |
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<!-- from suspension article "The crew of two and relatively light armour was insufficient for the infantry support function the tank was expected to have. The Army drew up a specification for an improved T3 but following disputes with Christie the order - for 5 of the "Convertible Medium Tank T3E2" was given to the American-La France company.<ref>Hunnicutt p23-24</ref>" --> |
<!-- from suspension article "The crew of two and relatively light armour was insufficient for the infantry support function the tank was expected to have. The Army drew up a specification for an improved T3 but following disputes with Christie the order - for 5 of the "Convertible Medium Tank T3E2" was given to the American-La France company.<ref>Hunnicutt p23-24</ref>" --> |
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Revision as of 16:32, 11 January 2021
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| Christie M1931 T1 Combat Car T3 Medium Tank | |
|---|---|
 Christie M.1931 during a demonstration | |
| Type | Cruiser tank/medium tank |
| Place of origin | United States |
| Service history | |
| In service | 1932-1936 |
| Used by | United States |
| Production history | |
| Designer | J. Walter Christie (US Wheel Track Layer Corporation) |
| Designed | 1930 |
| Manufacturer | US Wheel Track Layer Corporation |
| Unit cost | $34,500 (without the armament, turret, engine, muffler, or radio) |
| Produced | 1930-1931 |
| No. built | 9 |
| Specifications | |
| Mass | 22,220 lb (10 tonnes) [1] (Combat weight) |
| Length | 5.55 m (18 ft 3 in) |
| Width | 2.23 m (7 ft 4 in) |
| Height | 2.28 m (7 ft 6 in) |
| Crew | 2 (Gunner, driver) [1] |
| Armor | 5⁄8 in (16 mm) maximum[a] [1] |
Main armament | 37mm M1916 (T3 Medium) 12.7mm M2 Browning machine gun (T1 Combat Car) |
Secondary armament | 7.62 mm M1919A4 Browning machine gun |
| Engine | Liberty L-12 12-cylinder gasoline engine; 449 hp (335 kW) at 2,000 rpm |
| Suspension | Christie suspension |
| Maximum speed | 40 mph (64 km/h) Governed, on wheels 25 mph (40 km/h) Governed, on tracks [1] |
The Christie M1931, known as the Combat Car, T1 in US Cavalry use and Medium Tank, Convertible, T3 in Infantry branch, was a wheel-cum-track tank designed by J. Walter Christie for the United States Army using Christie's own ideas of an aero-engine and his novel suspension to give high mobility.
The M1931 was Christie's first tank to be accepted for production by the US Army, and was used briefly by the US Cavalry and US Infantry, as part of the 1st Mechanized Cavalry Corps and the 2nd Tank Regiment. Christie's design had more influence in Europe with USSR and UK developing Christie's ideas in the form of Bystrokhodny ("fast") tanks and cruiser tanks respectively.
Development
The Christie M.1931 originated as the M1928 which used Christie's suspension and had the ability to run on either its tracks or the wheels. When the M1928 was demonstrated unofficially to the US Army by traversing a route at an average speed of 45 km/h (28 mph); by contrast the US Army's T1E1 tanks - expected to replace their WWI-era M1917 light tanks - averaged 16 km/h (9.9 mph) over the same route. This prompted sufficient interest to properly consider Christie's ideas.
In 1930, after protracted negotiations, a contract was signed with Christie's US Wheel Track Layer Corporation to build an improved version of the M1928 at a cost of $55,000.
The prototype M1931, without a was delivered in March 1931. An order for seven more was placed in June; these were delivered by 1932. Initially officially designated as "Convertible Medium Tank T3", four were passed to the Cavalry. With the gun replaced by a heavy machine gun they were renamed "Combat Car T1".[b] [2] The prototype was returned to Christie.
Notes
- ^ on hull front
- ^ The Cavalry were not allowed - by the National Defense Act of 1920 - to possess "tanks" which were defined as limited to the Infantry, so the renaming was a way to circumvent the demarcation
References
- Hunnicutt, Richard Pearce (1978). Sherman: A History of the American Medium Tank. Presidio Press. ISBN 978-1-62654-862-6.
- Neal, R. J. (2009). A Technical & Operational History of the Liberty Engine: Tanks, Ships and Aircraft 1917-1960. United States: Specialty Press.
- Ellis, C.; Chamberlain, P. (1972). Pictorial History of Tanks of the World, 1915-45. United States: Stackpole Books.
- Zaloga, Steven (2015). Armored Champion: The Top Tanks of World War II.
External links
- "Christie M1931/ Medium Tank T3/ Combat Car T1" at History of War
- "Christie M1931" at Tank Archives