| Nudelman-Suranov NS-23 | |
|---|---|
 NS-23 cannons on a Mig-15 at Muzeum Polskiej Techniki Wojskowej, Warsaw | |
| Type | Autocannon |
| Place of origin | USSR |
| Service history | |
| Used by | USSR |
| Wars | Cold War |
| Production history | |
| Produced | 1944–1953 |
| No. built | 28,479 |
| Variants | NS-23k |
| Specifications | |
| Mass | 37 kilograms (82 lb) |
| Length | 198.5 centimetres (6.51 ft) |
| Barrel length | 145 centimetres (4.76 ft) |
| Shell | 23×115mm |
| Shell weight | 175 g (6.2 oz) |
| Caliber | 23 millimetres (0.91 in) |
| Barrels | 1 |
| Action | short recoil |
| Rate of fire | 550 rpm |
| Muzzle velocity | 690 metres per second (2,300 ft/s) |
| Feed system | belt |
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 14.5×114mm anti-tank round by necking it out to 23 mm.
A synchronized version, designated NS-23S (for synchronized), was used for fixed installations firing through the propeller arc.
Applications of the NS-23 included the Antonov An-2, Ilyushin Il-10, Ilyushin Il-22, Lavochkin La-9, La-15, MiG-9, Yak-9UT, Yak-15, Yak-17, Yak-23, and Tu-4. Some early MiG-15s were also equipped with the NS-23.
The NS-23 was replaced in service by the Nudelman-Rikhter NR-23 around 1949.
