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Nudelman-Suranov NS-23
A Nudelman-Suranov NS-23 cannon on display at the National Museum of the US Air Force
TypeAutocannon
Place of origin USSR
Service history
Used by USSR
WarsCold War
Production history
Produced1944—1953
No. built28,479
Specifications
Mass37 kilograms (82 lb)
Length198.5 centimetres (6.51 ft)
Barrel length145 centimetres (4.76 ft)

Shell23x115mm
Shell weight175 g (6.2 oz)
Caliber23 millimetres (0.91 in)
Actionshort recoil
Rate of fire550 rpm
Muzzle velocity690 metres per second (2,300 ft/s)
Feed systembelt

The NS-23 was a 23 mm (0.91 in) aircraft cannon designed by A. E. Nudelman, A. Suranov, G. Zhirnykh, V. Nemenov, S. Lunin, and M. Bundin during World War II as a replacement for the Volkov-Yartsev VYa-23 cannon. It entered service in 1944. The NS-23 round was derived from the 14.5x114mm anti-tank round by necking it out to 23 mm.

A synchronized version, designated NS-23S (S for synchronized), was used for fixed installations firing through the propeller disc.

Applications of the NS-23 included the Antonov An-2, Ilyushin Il-10, Ilyushin Il-22, Lavochkin La-7, Lavochkin La-15, MiG-9, Yakovlev Yak-7, Yak-9U, Yak-15, Yak-17, and Yak-23. Some early MiG-15s also were equipped the NS-23.

The NS-23 was replaced in service by the Nudelman-Rikhter NR-23 around 1949.

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