- M39 cannon
The Pontiac M39 was a 20 mm single-barreled
revolver cannondeveloped for the United States Air Forcein the late 1940s. It was used on a number of fighter aircraftfrom the early 1950sthrough the 1980s.
The M39 was developed by the
Springfield Armory, based on the World War II–era design of the German Mauser MG 213, a 20 mm (and 30 mm) cannon developed for the Luftwaffe, but not used in combat. The same design inspired the British ADEN cannonand the French DEFA, but American designers chose a smaller 20 mm round to increase the weapon's rate of fire and muzzle velocityat the expense of hitting power.
Initially designated the T-160, the new gun was installed for combat testing on a number of
F-86 Sabreaircraft under the "Gunval" program in late 1952, and used in action over Korea in early 1953. It was subsequently adopted as standard armament of the F-86H fighter-bomber, F-100 Super Sabre, F-101A and F-101C Voodoo, and the F-5 Freedom Fighter. Current models of the F-5 Tiger II still use the M39A2 version of this weapon.
* Type: single-barrel
* Caliber: 20 mm × 102 (0.79 in)
* Operation: five-chamber revolver
* Length: N/A
* Weight (complete): 81 kg (178.5 lb)
* Rate of fire: 1,500 rpm
* Muzzle velocity: 1,030 m/s (3,300 ft/s
* Projectile weight: 101 g (3.56 oz)
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