M40 Gun Motor Carriage
| 155 mm Gun Motor Carriage M40 | |
|---|---|
 M40 in the US Army Ordnance Museum. |
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| Type | Self-propelled artillery |
| Place of origin |  United States |
| Specifications | |
| Weight | 36.3 metric tons (80,000 lb) |
| Length | 9.1 m (29 ft 10 in) |
| Width | 3.15 m (10 ft 4 in) |
| Height | 2.7 m (8 ft 10 in) |
| Crew | 8 (Commander, driver, 6 gun crew) |
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| Armor | 12 mm |
| Main armament |
155 mm M2 gun 20 rounds |
| Engine | Wright (Continental) R975 EC2 340 hp (253 kW) |
| Power/weight | 9.36 hp/t |
| Suspension | HVSS (Horizontal Volute Spring Suspension) |
| Operational range |
170 km (106 mi) |
| Speed | 38 km/h (24 mph) on road 23 km/h (14 mph) off road |
The 155 mm Gun Motor Carriage M40 was a US self-propelled artillery vehicle built on a widened and lengthened Medium Tank M4A3 chassis but with Continental engine and with HVSS (Horizontal Valute Spring Suspension) that was introduced at the end of the Second World War. Equipped with a 155 mm M2 gun, it was designed to replace the earlier M12 Gun Motor Carriage. Its prototype designation was the T83, but this was changed to the M40 in March 1945.
A single pilot vehicle was used in the European Theatre in 1945 by 991st Field Artillery Battalion, along with a related 8 inch Howitzer Motor Carriage T89 which was sometimes also equipped with a 155 mm barrel.[1] A total of 311 out of a planned 600 were completed before the end of the war. From there it was deployed during the Korean War.
After World War II the M40 was used by the British Army, who designated it 155 mm SP, M40.
Contents |
[edit] Variants
The Army planned to use the same T38 chassis for a family of SP artillery:
- Cargo Carrier T30 - a few built before cancellation in December 1944 to make more chassis available for GMCs
- 8 inch Howitzer Motor Carriage M43 - 8 in (203 mm) HMC, standardized August 1945, 48 built
- 250 mm Mortar Motor Carriage T94 - 10 in (250 mm) MMC, began design Feb. 1945, one prototype completed in 1946
[edit] Related vehicles
- 105 mm Howitzer Motor Carriage M7B1 - self-propelled 105 mm Howitzer Motor Carriage (HMC) based on the M4A3 Sherman chassis.
- 155 mm Gun Motor Carriage M12 - self-propelled 155 mm Gun Motor Carriage (GMC).
- Cargo Carrier M30 - an M12 with crew and ammunition space in lieu of the gun.
[edit] Notes
- ^ Hunnicutt - Sherman: A History of the American Medium Tank, p 353-355, 570.
[edit] References
- Hunnicutt, R. P. (1994). Sherman: A History of the American Medium Tank. Presidio Press. ISBN 0-89141-080-5.
- Ness, Leland (2002). Janes World War II Tanks and Fighting Vehicles. Harper Collins. ISBN 0-00-711228-9.
[edit] See also
[edit] External links
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Wikimedia Commons has media related to: 155mm Gun Motor Carriage M40 |
