Bore and Stroke: 156 mm (6.1 in.) x 160 mm (6.3 in.) 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 ...

Bore and Stroke: 156 mm (6.125 in.) x 174 mm (6.875 in.) The Wright Cyclone series began in 1924 with a U.S. Navy contract for a nine-cylinder air-cooled radial engine having approximately the same ...