
The US Air Service Engineering Division 1920 W-1 aero engine was a 12-cylinder water-cooled V that produced 700hp@1700rpm to 750hp@1800rpm from 2778.66ci. The dry weight was 1725 lb.

The US Air Service Engineering Division 1920 W-1 aero engine was a 12-cylinder water-cooled V that produced 700hp@1700rpm to 750hp@1800rpm from 2778.66ci. The dry weight was 1725 lb.