The Hall-Scott A-7 was an early aircraft engine manufactured by the Hall-Scott company of Berkeley, California. Of straight-4 configuration, it developed 100 horsepower (75 kW). These engines suffered from reliability problems and were prone to catch fire while in operation.
Applications:
Aeromarine 39
Dayton-Wright FS
Standard J-1
A-7
1916
90-100hp@1400rpm
549.78ci
dry wt: 410 lb
A-7a
1916
100hp@1400rpm
606.14ci
dry wt: 420 lb
All Aero 