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M39 cannon
The Pontiac M39 was a 20mm revolver cannon developed for the United States Air Force in the late 1940s. It was used on a number of fighter aircraft from the early 1950s through the 1970s.
The M39 was developed by the Springfield Armory, based on the World War II-era design of the German Mauser MG 213C, a 30 mm cannon developed for the Luftwaffe but not used in combat. The same design inspired the British ADEN cannon and the French DEFA, but American designers chose a smaller 20mm round to increase the weapon's rate of fire and muzzle velocity at the expense of hitting power.
As the T-160 the weapon was first tested on F-86 Sabre aircraft in Korea that had been modified under the "Gunval" program. 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 still use the M39A3 version of this weapon, with 280 rounds per gun in single-seat models.
The M39 is not the same as the Hispano M3 derivatives used by the Navy (as the M3 and the later Colt Mk 12 cannon) on aircraft like the A-4 Skyhawk and F-8 Crusader.
Specifications
- Type: single-barrel automatic cannon
- Caliber: 20 mm (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)
This article is licensed under the GNU Free Documentation License at http://www.gnu.org/copyleft/fdl.html
You may copy and modify it as long as the entire work (including additions) remains under this license.
You must provide a link to http://www.gnu.org/copyleft/fdl.html
To view or edit this article at Wikipedia go to http://www.wikipedia.org/wiki/M39_cannon
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