Engine gun

Aircraft gun mounting position From Wikipedia, the free encyclopedia

An engine gun, or engine cannon (from German: Motorkanone, "motor cannon"), is an aircraft gun mounted behind and through the cylinder block of an inline aircraft engine (most often a V engine) with a reduction drive that displaces the propeller axle to be in line with the gun so that gunfire is allowed through the propeller hub. This allows for nose-mounted weaponry on aircraft without the need for synchronization gear while also permitting higher calibers for nose-mounted weaponry, which otherwise would be hard to adapt for synchronization gear.[1]

French Hispano-Suiza 12Y aircraft engine (cylinders removed) with Hispano-Suiza HS.404 engine gun mounted
Luftwaffe soldier inspects the engine gun alignment of a Bf 109 fighter aircraft
Firing channel on a Daimler-Benz DB 605 for an engine gun.

The first time this was done was during World War I when the French modified the Hispano-Suiza 8 engine to be able to install a 37 mm autocannon.[2] The concept was used widely before the Jet Age.

Historical engine guns

Finnish guns

French guns

German guns

Soviet guns

Swiss guns

Engine gun installations

A geared-output shaft HS 8C engine for a SPAD S.XII WWI aircraft, showing the elevated intake manifold to clear the 37 mm cannon (shown to the right) mounted in the "V" between the cylinder banks.

French engines

German engines

Soviet engines

Swiss engines

  • Saurer YS-2
  • Saurer YS-3

Aircraft with engine guns

References

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