All Aero

A two-cylinder horizontally opposed engine, rated 37.5 h.p. at 1000 r.p.m., was built with an unusually long stroke. The bore was 110 mm. (4.33 in.), the stroke 300 mm, (11.81 in.), and the total displacement 349.4 cu. in. The dry weight was stated to be 200 lbs., or 5.9 lbs. per rated h.p.