Allison V-1710-7 (V-1710-C4), V-12 Engine (2024)

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Allison V-1710-7 (V-1710-C4), V-12 Engine

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In early 1930, Allison manager N. H. Gilman sketched a design for a 559 kW (750-hp), 12-cylinder engine that would incorporate high-temperature glycol cooling and a turbosupercharger. The U.S. Navy contracted with Allison to supply the engine (known as the V-1710-A) for use on its airships. Originally known for modified Liberty engines and developing propeller reduction gears, this was the first of Allison’s own engines. Two years later the Army ordered a modified, more powerful version; redesigned during development and reintroduced in 1936 as the V-1710-C6.

Allison built more than 47,000 V-1710s in 57 versions. During World War II they powered various models of the Lockheed P-38, Curtiss P-40, Bell P-39 and P-63, and North American P-51. This artifact was the first Allison V-1710 engine to be flown. The Army Air Corps bought it in 1936 and flew it for 300 hours in the Consolidated XA-11A attack aircraft.

Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Object Details
Date 1936 Country of Origin United States of America Type PROPULSION-Reciprocating & Rotary Manufacturer Allison Division, General Motors Corporation
Physical Description Type: Reciprocating, 12 cylinders, V-type, supercharged, ethylene glycol cooled Power rating: 746 kW (1,000 hp) at 2,600 rpm Displacement: 28 L (1,710 cu in.) Bore and Stroke: 140 mm (5.5 in.) x 152 mm (6 in.) Weight: 575.6 kg (1,269 lb) Dimensions Height 134.6 cm (53 in.), Width 91.4 cm (36 in.), Depth 259.1 cm (102 in.)
Inventory Number A19600125000 Credit Line Transferred from the U.S. Air Force Central Museum Data Source National Air and Space Museum Restrictions & Rights Open Access (CCO)
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