The 1914 Gyro Motor Co Duplex K was a seven-cylinder air-cooled rotary aero engine producing 90hp@1250rpm from 667.97ci, with a dry weight of 215 lb.
Gyro Motor Duplex K
The 1914 Gyro Motor Co Duplex K was a seven-cylinder air-cooled rotary aero engine producing 90hp@1250rpm from 667.97ci, with a dry weight of 215 lb.
All Aero 