The powerful GR-2600 engine series was developed from experience with the earlier R-1510 and R-1670 models. Design of the Wright Cyclone 14 began in late-1935, with the first run in late-1936, and certification in mid-1937. Using 115-grade fuel in a high-compression version, the Cyclone 14 made transatlantic passenger service practical when an order was placed by Pan American Airways, Inc. for twenty five to be installed in the new Boeing Model 314 Clipper Ships.

Along with the Boeing 314, the GR-2600-A2A powered other commercial aircraft such as the Brewster 340, Douglas DB7A and DB7B, Short Brothers Stirling, Vultee 72, Martin M-1878-1, and Boeing SA-307B. A total of 8,821 commercial GR-2600 engines of all models were built between May 1937 and January 1946. A total of 76,488 military GR-2600 engines of all models were built between February 1937 and April 1945, and powered such aircraft as the North American B-25, Martin PMB Mariner, and Vultee A-31.

 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 Circa1942 Country of Origin United States of America Type PROPULSION-Reciprocating & Rotary Manufacturer Wright Aeronautical
 Physical Description Type: Reciprocating, 14 cylinders, 2 rows, radial, air-cooled Power rating: 1,268 kW (1,700 hp) at 2,600 rpm Displacement: 42.7 L (2,603 cu in.) Bore and Stroke: 61 mm (15.6 in.) x 160 mm (6.3 in.) Weight: 885 kg (1,950 lb) Dimensions Overall: 2000lb. (907.2kg)
Other (Engine): 4 ft. 6 1/4 in. × 5 ft. 3 1/8 in. (137.8 × 160.3cm)
Storage (Stand): 6 ft. 8 3/4 in. × 5 ft. 2 in. (205.1 × 157.5cm)
 Materials Ferrous Alloys
Aluminum Alloy
Copper Alloy
Rubber
Paints
 Inventory Number A19510049000 Credit Line Gift of United States Naval Academy Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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