Allison V-1710-143 (V-1710-G6R), V-12 Engine

Type: Reciprocating, V-type, 12 cylinders, supercharged, ethylene glycol-cooled

Power rating: 1,193 kW (1,600 hp) at 3,200 rpm

Displacement: 28 L (1,710 cu in.)

Bore and Stroke: 140 mm (5.5 in) x 152 mm (6 in)

Weight: 723.5 kg (1,595 lb)

Having originally been known for modified Liberty engines and developing propeller reduction gears, this was the first of Allison’s own engines. In 1937 the Allison V-1710 became the first American engine to qualify at 746 kW (1,000 horsepower) for the new 150-hour military type test, and was the only U.S. liquid-cooled engine production engine of World War II.

The Allison V-1710 powered the majority of U.S. Army fighters during World War II, including the Lockheed P-38, Bell P-39 and P-63, Curtiss P-40, and early models of the North American P-51. The Allison V-1710-143 powered the North American F-82E, F-82F, and F-82G. This 2-stage supercharged version of the engine was the ultimate development of the V-1710. A total of 375 Model G6R engines were produced in the period 1946-47. This artifact, serial number A-074119, was one of the very last V-1710s built (serial number A-074125 was the last V-1710).