M56 Scorpion

M56 Scorpion
M56 Scorpion preserved at the American Armored Foundation Tank Museum in Danville, Virginia.
Type	Self-propelled gun
Place of origin	United States
Service history
Used by	See Operators
Wars	Vietnam War Western Sahara War
Production history
Manufacturer	Cadillac Motor Car Division of General Motors
Produced	1953–1959
No. built	325
Specifications
Mass	7.1 tonnes (16,000 lb)
Length	4.55 metres (14 ft 11 in) (excluding gun) 5.84 metres (19 ft 2 in) (overall)
Width	2.57 metres (8 ft 5 in)
Height	2.05 metres (6 ft 9 in) over gun shield
Crew	4 (commander, gunner, loader and driver)
Armor	unarmored except for blast shield
Main armament	90 mm M54 Gun 29 rounds
Engine	Continental AOI-403-5 gasoline engine 200 brake horsepower (150 kW)
Transmission	Allison CD-150-4, 2 ranges forward, 1 reverse
Suspension	Torsion tube over bar at wheels 1 and 4, torsion bar at wheels 2 and 3
Ground clearance	0.32 m (1 ft 1 in)
Fuel capacity	210 litres (46 imp gal; 55 US gal)
Operational range	230 kilometres (140 mi)
Maximum speed	45 kilometres per hour (28 mph)

The M56 "Scorpion" Self-Propelled Gun is an American unarmored, airmobile self-propelled tank destroyer, which was armed with a 90mm M54 gun with a simple blast shield, and an unprotected crew compartment.