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De Havilland Gipsy Major




The de Havilland Gipsy Major or '''Gipsy IIIA''' was a 4-cylinder, air-cooled, inline Engine used in a variety of light Aircraft in the 1930s including the famous Tiger Moth Biplane . The engine was a slightly modified '''Gipsy III''' which was effectively a De Havilland Gipsy engine modified to run inverted so that the cylinders pointed downwards below the Crankcase . This allowed the Propeller shaft to be kept in a high position without having the cylinders blocking the pilot's forward view over the nose of the aircraft. One disadvantage of the inverted configuration was that there was a continual loss of oil and regular refills of the oil tank were required. The Major was a slightly bored out (118 mm from 114 mm) Gipsy III. First built in 1932 , total production of all Gipsy Major versions was 14,615 units.

Examples are on display at the Mosquito Aircraft Museum .


AIRCRAFT



SPECIFICATIONS (GIPSY MAJOR)

  type 4-cylinder air-cooled Inverted Inline piston aircraft engine
  bore 465 in (118 mm)
  displacement 374 in³ (612 L)
  weight 305 lb (138 kg)
  coolingsystem Air-cooled
  power 145 hp (108 kW) at 2,350 rpm
  specpower 039 hp/in³ (176 kW/L)
  power/weight 048 hp/lb (078 kW/kg)