Postwar use
Two MG 151/20 cannon fitted to a Finnish TorKK MG-151 2 anti-aircraft mounting. Cannons of Torp museum (2011)
After World War 2, numbers of ex-Luftwaffe MG 151/20 cannon were removed from inventory and from scrapped aircraft and used by various nations in their own aircraft. The French Air Force and French Army aviation arm (ALAT) utilized MG 151/20 cannon as both fixed and flexible armament in various aircraft, including helicopters. The FAF and ALAT jointly developed a rubber-insulated flexible mount for the MG 151/20 for use as a door gun, which was later used in combat in Algeria aboard several FAF/ALAT H-21C assault transport helicopters and on Sikorsky HSS-1 Pirate gunship helicopters. French Matra MG 151 20mm cannons were used by Portugal and Rhodesia(21) fitted to their Alouette III helicopters, while Denel designed its own variant for the South African Air Force.(22)
MG 151 specifications
• Type: single-barrel automatic cannon• Caliber: 15×96mm
• Operation: Recoil-operated; short recoil
• Length: 1916 mm
• Barrel length: 1254 mm
• Rifling: 8 grooves, right hand twist, 1 turn in 16"
• Weight (complete): 38.1 kg (84 lb)
• Rate of fire: 740 rpm
• Effective range: 1000 m
• Muzzle velocity: 850 m/s (AP-T); 960 m/s (HE-T, HEI-T); 1030 m/s AP(WC)
• Projectile types:
AP-T weighing 72 g
HE weighing 57 g. HE filler: 2.8 g
AP(WC) weighing 52 g


