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 ...

Bore and Stroke: 155.6 mm (6.125 in.) x 160.3 mm (6.3125 in.) Wright Aeronautical carried on important experimental work during 1936, culminating in announcement of the Wright Cyclone 14 early in 1937 ...

Packard Motor Car Co.’s President Alvan Macauley last week said that by the end of March he would be manufacturing the new Packard-Diesel airplane motor. That will be a milestone, the first ...