KARAYA E4804 Jupiter VIIF engine

The Bristol Jupiter was a British aircraft engine from the interwar and early stage of World War II manufactured by the Bristol Airplane Company. It was designed by Sir Roy Fedden - the later designer of, among others Bristol Hercules engine. It was first tested in flight in October 1918. The engine - in the XFA version - weighed 451 kilograms with a displacement of 28.7 liters.

The Bristol Jupiter was a 9-cylinder radial engine built in a single star system. It was originally designed for Cosmos Engineering, which, however, went bankrupt in 1920 and was taken over by Bristol, which undertook its serial production. It is estimated that over 7,100 copies of this engine were produced. It was undoubtedly one of the best aircraft engines of the 1920s and 1930s. Its quality was determined by the use of four valves per cylinder, which was a rarity at the time, careful mechanical refinement or a very good power-weight relationship. The Bristol Jupiter was constantly improved and in subsequent versions it achieved higher and higher maximum powers, for example: Jupiter I had 400 HP, Jupiter VII F 480 HP, and Jupiter XF 540 HP. The engine was used as a power unit for many British military and civil aircraft. It powered such planes as, for example: Bristol Bulldog, de Havilland DH. 50 or Fairey Flycatcher. It was also licensed in, among others, Japan and Poland. It also served as a propulsion for such aircraft as the Fokker F.VII or PZL P.7.