Gnome-Rhône Mistral Major

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Mistral Major
Gnome-Rhone 14 Mistral Major engines 1943.jpg
Gnome-Rhône 14s in a hangar in North Africa, 1943
Type Radial engine
Manufacturer Gnome et Rhône
First run 1929

The Gnome-Rhône 14K Mistral Major was a 14-cylinder, two-row, air-cooled radial engine. It was Gnome-Rhône's major aircraft engine prior to World War II, and matured into a highly sought-after design that would see licensed production throughout Europe and Japan. Thousands of Mistral Major engines were produced, used on a wide variety of aircraft.

Design and development[edit]

In 1921 Gnome-Rhône purchased a license for the highly successful Bristol Jupiter engine and produced it until about 1930, alongside the smaller Bristol Titan. Starting in 1926, however, they used the basic design of the Titan to produce a family of new engines, the so-called "K series". These started with the 5K Titan, followed by the 7K Titan Major and 9K Mistral. By 1930, 6,000 of these engines had been delivered.

However, the aircraft industry at that time was rapidly evolving and producing much larger aircraft that demanded larger engines to power them. Gnome-Rhône responded by developing the 7K into a two-row version that became the 14K Mistral Major. The first test examples were running in 1929.

Licence built derivatives[edit]


Aircraft powered by G-R 14K derivatives[edit]

Specifications (Gnome-Rhône 14Kdrs)[edit]

Data from [1]

General characteristics

  • Type: Fourteen-cylinder two-row air-cooled radial engine
  • Bore: 146 mm (5.75 in)
  • Stroke: 165 mm (6.5 in)
  • Displacement: 38.72 l (2,363 in³)
  • Diameter: 1,296 mm (51.02 in)
  • Dry weight: 540 kg (1,190 lb)



See also[edit]

Related development
Related lists


  • Danel, Raymond and Cuny, Jean. L'aviation française de bombardement et de renseignement 1918-1940 Docavia n°12, Editions Larivière