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de Havilland Gipsy Twelve

Engine overview:

Four 525 hp de Havilland Gipsy Twelve Series I engines were specifically designed by the English aircraft designer, Major Frank Halford to power the wooden  DH91 Albatross airliner, which made its maiden flight on 20th May 1937. The 12 cylinder air-cooled supercharged engine was later re-designated the Gipsy King by the Air Ministry when it was selected to power the DH93 Don general purpose trainer.

 

Engine specifications:

Number of Cylinders: 12

Bore: 118 mm

Stroke: 140 mm

Capacity: 18 litres

Maximum Brake Horsepower (BHP): 525

First engine delivered: 1936

Number built: 50