de Havilland Gipsy Major

In 1931, designer Frank Halford increased the bore of the Gipsy III from 114 to 118 mm. The resulting engine was known as the Gipsy IIIA or the Gipsy Major. De Havilland produced over 14,500 Gipsy Majors, over half the total production of all Gipsy engines.
Gipsy Majors acquired by the U.S. Army were designated as the L-375.


  • Gipsy Major 1C: 145 hp (108 kW)
  • Gipsy Major 8: 145 hp (108 kW)


  • Inverted, inline 4-cylinder piston engine
  • Displacement: 374 cubic inches  (6.1 litres)
  • Bore x stroke: 118 x 140 mm

used by

  • de Havilland D.H.82 Tiger Moth
  • de Havilland D.H.83 Fox Moth
  • de Havilland Canada DHC-1 Chipmunk