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M37 Self Propelled Gun

The T76 prototype was an amalgamation of elements from in service vehicles, notably the M24 Chaffee tank chassis and the 105mm calibre howitzer main gun from the M4 Sherman 105 tank. The M37 HMC was intended to replace the M-7 Priest 105mm SP. Compared to other Self Propelled Guns, it had a large structure for the 105mm main gun, giving it a higher elevation than the M4 Sherman 105 and thus a greater range.

The M37 105-mm Howitzer Motor Carriage (HMC) was developed to improve upon the very successful M7 Priest 105-mm HMC that was based on the M3/M4 medium tank chassis. Developed using the M24 Chaffee light tank chassis, the M37 provided significant improvements over the M7 including increased howitzer traverse, easier ammunition replenishment, lighter weight and a higher top speed.

Standardized for production in January 1945, production didn't actually begin until September 1945 and ended in October of the same year after a run of 150 vehicles was produced. It was designated the M37 316 of the 448 that were ordered in November 1944 were built. It was also supplied to allied nations and was replaced in service by the M52.

While produced too late to see action in World War II, the M37 HMC saw heavy service with U.S. Army field artillery units in the Korean War. After the Korean War ended, the M37 was phased out of service in favor of the M52 105-mm HMC that was based on the M41 Walker Bulldog. M37's were then exported to U.S. NATO allies including Spain. During the 1960s and early 1970s, they could be seen in Hollywood movies such as Battle of the Bulge and Patton.

Main Gun 105mm M4 howitzer
Length 18' (5.49-m)
Width 9' 10 (3-m)
Height 9' 4 (2.84-m)
Crew 7
Armor .5 (12.7-mm) steel all around
Secondary1x .50-cal M2HB machine gun
Ammunition 126x 105-mm
990x .50-cal
Engine Twin Cadillac Series 44T4 16-cylinder (8/engine), 220-hp (110-hp/engine)
Power/weight 9.56-hp/ton
Fuel Capacity 110-USG (420-l)
Range 100-miles (160-km)
Top Road Speed 35-mph (56-km/h)

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