The 1914 Gyro Motor Co Duplex J was a five-cylinder air-cooled rotary aero engine producing 50hp@1250rpm from 477.12ci, with a dry weight of 170lb.
The 1914 Gyro Motor Co Duplex J was a five-cylinder air-cooled rotary aero engine producing 50hp@1250rpm from 477.12ci, with a dry weight of 170lb.