All Aero

A four-cylinder horizontal type was also built with bore was 110 mm. (4.33 in.), the stroke 300 mm, (11.81 in.). This engine had a total displacement of 698.8 cu. in. and was rated 75 h.p. at 1000 r.p.m. The dry weight is reported to have been 528 lbs., or 7 lbs. per rated h.p. the same displacement and rated at 100 h.p., was built with 160 mm. (6.3 in.) bore and 140 mm. (5.51 in.) stroke. The dry weight was said to be 638 lbs., or 6.38 lbs. per rated h.p.