155 mm gun motor carriage M40 | |
---|---|
Type | Self-propelled artillery |
Place of origin | United States |
Production history | |
No. built | 311 |
Specifications | |
Mass | 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) |
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) |
Maximum speed | 38 km/h (24 mph) on road 23 km/h (14 mph) off-road |
The 155 mm gun motor carriage M40 was an American self-propelled artillery vehicle built on a widened and lengthened medium tank M4A3 chassis, but with a Continental engine and with HVSS (horizontal volute spring suspension), which 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 T38, but this was changed to the M40 in March 1945.[ citation needed ]
A single pilot vehicle was used in the European Theatre in 1945 by the 991st Field Artillery Battalion, along with a related 8-inch howitzer motor carriage T89, (later re-designated the M43 howitzer motor carriage) which was sometimes also equipped with a 155 mm barrel. [1] A total of 311 out of a planned 600 were completed by the Pressed Steel Car Company before the end of the war, 24 of which were later converted into M43s. From there it was deployed during the Korean War.[ citation needed ]
After World War II, the M40 was used by the British Army, who designated it 155 mm SP, M40 and called it Cardinal in the tradition of using ecclesiastical names for self-propelled (SP) artillery, such as Deacon, Priest, Bishop and Sexton.[ citation needed ]
A complete gun section consisted of one M40 GMC and one M4A1 high speed tractor towing a 4-wheel, 8-ton M23 ammunition trailer. Each battery had four gun sections. The M4A1/M23 combination replaced the earlier M30 cargo carrier. [2]
The Army planned to use the same T38 chassis for a family of SP artillery:
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The 203 mm howitzer motor carriage M43 was an American self-propelled artillery vehicle built on a widened and lengthened medium tank M4A3 chassis, but with a Continental engine and HVSS that was introduced at the end of World War II. The M43 shared the same chassis as the more widely produced M40 gun motor carriage, which instead mounted a 155 mm gun, and were designed by the Pressed Steel Car Company. A production run of 576 was planned originally, but in the end only 24 were produced and another 24 were converted from M40 hulls. The M43 went on to serve in the Korean War, and was retired after its conclusion.
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