|Alternative Designations||Scorpion, Self-Propelled Anti-Tank (SPAT)|
|Country of Origin||USA|
|Date Of Introduction||1953|
|Crew||4 (commander, gunner, loader, driver)|
|Combat Weight||7.88 tons (7.14 mt)|
|Ground Pressure||4.25 psi (0.3 kg/cm²)|
||19.17 ft (5.84 m)|
||14.95 ft (4.56 m)|
||8.45 ft (2.58 m)|
||6.5 ft (1.98 m)|
|Engine||Continental AOI-402-5 200 hp (149 kw) 6 cylinder, fuel-injected, air cooled gasoline|
|Transmission||CD-150-4 cross-drive torque converter. 2 speed forward, 1 speed reverse.|
|Range||140 miles (225 km)|
|Fuel Capacity||55 gal (208 l) gasoline|
|Road Speed||28 mph (45 km/h)|
|Cross Country Speed||?|
|Fording Depth||3.5 ft (1.07 m). 5.0 ft (1.52 m) with kit.|
|Trench Crossing||4.0 ft (1.22 m)|
|Vertical Wall Climb||2.5 ft (0.76 m)|
|Armor||N/A (gun shield for driver)|
|Explosive Reactive Armor||N/A|
|Active Protective System||N/A|
|NBC Protection System||N/A|
||Typical Ammo Load
|90mm M54 gun
||M88 mount; manual loading
|Fire Control System||T186 Telescope sight|
|Main Gun Stabilization||N/A|
The M56 Scorpion unarmored 90mm self-propelled gun was designed to provide anti-tank capabilities to airborne units.
The M56 was deployed with the 82nd and 101st Airborne Divisions and saw limited action in the Vietnam War.
The vehicle was replaced by the M551 Sheridan
"Gun, Self-Propelled, Full-Tracked, 90mm, M56".
Original production model. See data above.
Fort Benning National Infantry Museum.
Fort Bragg Museum.