de Havilland Gipsy III
Engine overview:
The Gipsy III engine was the first to be designed by the English aircraft designer, Major Frank Halford with the cylinders inverted to give a better view for the pilot and less drag. The engine was used to power the DH80A Puss Moth.
Engine specifications:
Number of Cylinders: 4
Bore: 118 mm
Stroke: 140 mm
Capacity: 6.12 litres
Maximum Brake Horsepower (BHP): 120
First engine delivered: May 1930
Number built: 611