
The 1915 Hall-Scott A-5 aero engine was a liquid-cooled inline six-cylinder producing 125hp@1250rpm from 824.67ci and with a dry weight of 525 lb.
The model A-5a of 1915 produced 165hp@1475rpm from 909.22ci.

The 1915 Hall-Scott A-5 aero engine was a liquid-cooled inline six-cylinder producing 125hp@1250rpm from 824.67ci and with a dry weight of 525 lb.
The model A-5a of 1915 produced 165hp@1475rpm from 909.22ci.