The 1915 Aeromarine B-90 was a 423.2ci geared eight cylinder water cooled Vee. Cast iron cylinders were set at 90° and the propshaft was mounted on two tapered roller bearings capable of end thrust in either direction. Geared prop speed at .571.
148hp@2275rpm
166hp@2635rpm
Dry wt: 460 lb
All Aero 