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http://www.kbptula.ru/eng/str/cannons/gsh23L.htm: GSh-23L
Gryazev-Shipunov GSh-23
23mm automatic cannon. Twin barrel "Gast gun" mechanism fires one barrel after the other, for better firing rate and less wear than a single barrel gun.
Basic Characteristics
Round type: AM-23
Caliber, mm: 23
Rate of fire, rds/min: 3000-3400
Muzzle velocity, m/s: 715
Weight, kg:
- cannon: 50.5
- round: 0.325
- projectile: 0.174
I doubt it is imported from Russia like the engine, must be a Chinese-built version of the Russian gun.
Somebody at PakDef says he has visited Kamra and was told that two more weapon stations will be added, one under each air intake (similar to the J-10). He doesn't know when. He also posted a photo of himself standing in a hangar alongside a JF-17 and a PAF officer wearing a JF-17 squadron patch on his uniform.
The Gryazev-Shipunov GSh-30-1 - the actual Russian designation is GSh-301 - (also known by the GRAU index designation 9A-4071K) is a 30 mm cannon designed for use on Soviet and later Russian military aircraft, entering service in the early 1980s. Its current manufacturer is the Russian company Izhmash JSC.
The GSh-301 is a single-barreled, gas-operated cannon weighing 46 kg (101 lb). Unlike many postwar cannons, it is linear action, not a revolver cannon or Gatling gun, with the Russians feeling that the reduction in rate of fire is compensated by reduced mass and bulk.
The GSh-301 has a rate of fire of 1,800 rounds per minute, customarily limited to 1,500 rounds per minute to reduce barrel wear. Despite that, its barrel life is quite short: 2,000 rounds. When firing a continuous burst of 100 - 150 rounds, the barrel is put under so much stress that it has to be replaced. The gun uses an evaporation cooling system to prevent the detonation of a high explosive round inside a heated barrel. This cooling system consists of a cylindrical water tank around the rear end of the barrel. The GSh-301 is equipped with a unique the pyrotechnic mechanism to clear misfires: A small pyrotechnic cartridge is located to the left of the 30mm cartridge chamber. This pyrotechnic cartridge fires a small steel bolt through the side wall of the 30mm cartridge. The hot propellant gases following the bolt into the dud 30mm round ignite the powder charge of that round and firing continues. The manufacturer (Izhmash Arms Plant, Izhevsk) claims its maximum effective range against aerial targets is 1,200 to 1,800 m (3,900 to 5,900 ft).
In combination with a laser rangefinding/targeting system, it is reported to be extremely accurate as well as powerful, capable of destroying a target with as few as three to five rounds. It has been deployed on several different types of fighter aircraft:
Su-27, Su-30, Su-33 and Su-35: 1 GSh-301 in starboard wing root (150 rds. ammunition load)
Su-34: 1 GSh-301 in starboard wing root (180 rds. ammunition load)
MiG-29: 1 GSh-301 in port wing root (150 rds. ammunition load)
Yak-141: 1 GSh-301 on the belly (150 rds. ammunition load)
9A4273 gun pod: 1 GSh-301 flexibly mounted, pod weight 480kg, (150 rds. ammunition load)
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The Gryazev-Shipunov GSh-30-2 (ГШ-30-2) or GSh-2-30 is a powerful twin-barrel autocannon used on certain Russian military aircraft.
The cannon is not related to the Gryazev-Shipunov GSh-30-1, but is a heavy-duty gas-operated weapon operating on the Gast principle like the Gryazev-Shipunov GSh-23L. Rate of fire is about 3,000 rounds per minute. The weapon is designed to be rugged and resistant to dirt; this makes it relatively heavy. Depleted uranium enhanced armor-piercing shells suitable for the GSh-30-2 are operationally qualified.
The GSh-30-2 is carried by the Sukhoi Su-25 ground attack plane and in external gun pods. It measures 2044 x 222 x 195mm, with a barrel length of 1500mm and a weight of 115 kg. The GSh-30K is a modified version with 2400mm long water-cooled barrels, a variable rate of fire, and dimensions of 2944 x 222 x 195mm. It is used on a fixed mounting on late model Mi-24 helicopters, e.g the Mi-24P.
Manufacturer: KBP Instrument Design Bureau
Type: dual-barrel automatic cannon
Caliber: 30x165mm, electrically primed
Operation: Gast principle
Length: 2044 mm
Weight (complete): 115 kg
Rate of fire: 3000 rpm
Muzzle velocity: 880-890 m/s
Projectile weight: 386-404 g (13.6-14.25 oz)
Changing of JF-17s gun caliber from 23mm to something else would be not envisioned at this time or any time in near future, reason being the Gsl-23mm gun version are used in F-7 & F-7PG versions of PAF, the current J-10 & future FC-20 are also using the same gun, some of the Chinese fighter aircrafts also use this gun and caliber. So for ease of ammo and commonality this gun will be kept.
Also, the higher caliber we go to, it will add additional weight of ammo, reduced capacity and huge cost for changing the guns of entire series of aircrafts and ammo.
And the Gsl-23mm gun I believe is China made as sometime ago read that Russia had stopped production of the 23mm caliber gun as they have changed to the 30mm caliber for their aircrafts.
Which gun PAF's F-16A's have? I like that style of gun more than this one on JF-17.
Yup.It has a Gatling style gun, 6 barrel i believe. 20mm.
please see this pic,it's mean Gsl-23mm gun very light
Below is my attempt to compare the two systems:
I concluded that if one considers the kinetic energy of each round and the number of rounds per minute, the 23mm system if 71% as effective as the 30mm brother. Assume a target is expossed for a second, it will deliver 70% of the damage. I believe the heavier system will take longer to get to full cyclic rate.
I cannot find the spreadsheet but I did a similar somparison with the Mauser BK-27 on the Gripen and the GSh-23 will deliver more energy per second. I am assuming muzzle velocity here and also non-exploding rounds.