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V-1710 Aircraft Engine


Photograph of V-1710 Allison aircraft engine

National Museum of the USAF

The Allison V-1710 was a liquid-cooled supercharged aircraft engine with 12 cylinders, a bore of 5.5 inches (140mm) and stroke of 6 inches (152mm) for a displacement of 1710 cubic inches (28.0 liters.) Each of the two banks of cylinders was a single light alloy casting. The coolant was pure ethylene glycol pumped at up to 300°F (150°C). The engine was designed from the start to use a turbosupercharger, but these were not available in sufficient numbers to equip any but the P-38 engine models.

Development of the engine began in earnest around 1931, after Allison had been acquired by General Motors and was given an infusion of capital. By 1937 the engine was undergoing extensive flight testing, and it was adopted for the P-38 Lightning

Most models were produced in pairs, the second model number being a mirror image of the first, used to balance torque on multiple engine aircraft such as the Lightning.

Model
Horsepower
Wattage
Notes
F3R
1150 hp
858 kW

27
1150 hp
858 kW
Mirror: -29
33
1040 hp
776 kW

35
1150 hp (13,800 feet)
858 kW (4200m)

39
1150 hp 858 kW
49
1325 hp
988 kW
Mirror: -52
51
1325 hp
988 kW
Mirror: -53
73
1325 hp 988 kW
81
1200 hp
895 kW

85
1200 hp
895 kW

89
1425 hp 1063 kW Mirror: -91
111
1600 hp 1190 kW
Mirror: -113

Aircraft using this engine included the P-38 Lightning, the P-39 Airacobra, the P-40 Warhawk, and early versions of the P-51 Mustang.

References
Gunston (2006)
National Museum of the USAF (accessed 2008-2-14)


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