4 of the most powerful cannons on Russian fighter jets.

GSh-30-1

The GSh-30-1 automatic cannon has appeared on all Soviet and Russian fighter jets from the 1980s to the present day. "GSh" is an abbreviation of the surnames of the designers Vasiliy Gryazev and Arkadiy Georgiyevich Shipunov, "30" is the caliber in mm, while "1" is the number of barrels on each cannon system.

The GSh-30-1 uses a short recoil-operated loading mechanism with hydraulic brakes, evaporative liquid cooling, and electric ignition. This operating mechanism differs from many contemporary air-launched guns, resulting in a relatively slow rate of fire, but its weight of only 46 kg is significantly lighter than other models.

The designers equipped the GSh-30-1 with a special firing mechanism to deal with situations where the projectile fails to detonate. In such cases, a hot electrode is launched through the projectile casing, igniting all the gunpowder inside, propelling the projectile out of the barrel, and allowing the cannon to continue functioning normally. This feature makes the GSh-30-1 very resistant to jamming, increasing its reliability in combat situations.

The GSh-30-1 model achieved a maximum rate of fire of 1,800 rounds per minute, but was usually limited to 1,500 rounds per minute to reduce barrel wear. However, the gun barrel had a relatively short lifespan and typically wore out after only 2,000 rounds. The gun had an effective range of approximately 800 m against airborne targets and a maximum range of 1,800 m when engaging ground targets.

When combined with the laser rangefinder and infrared tracking system on the fighter jet, this type of cannon has very high accuracy. The 30x165 mm caliber allows it to shoot down enemy aircraft with only 3-5 accurate shots.

GSh-23

This is a twin-barreled 23mm automatic cannon, developed during the Soviet era and commissioned in 1965. The GSh-23 operates on a principle developed by German engineer Karl Gast in 1916. Firing one barrel activates the firing mechanism in the other, increasing the rate of fire and reducing wear compared to single-barreled cannons.

Unlike the American M61 Vulcan, this artillery piece does not require an external power source to fire, but instead utilizes the recoil of the barrel for continuous reloading. The GSh-23 has a theoretical firing rate of up to 3,600 rounds per minute, but the actual number is usually limited to conserve ammunition and reduce barrel wear.

The GSh-23 is renowned for its robustness, power, and ease of maintenance on the battlefield. This gun is fitted to several variants of the MiG-21 and MiG-23 fighter jets, as well as the Tu-22 and Tu-95 bombers. In addition to firing high-explosive rounds, the GSh-23 can also fire decoy flares to deceive heat-seeking and radar-guided missiles.

GSh-6-30

This rotary gun model was designed in the early 1970s and entered service in 1975. The GSh-6-30 is developed from the AO-18 rotary gun platform of the AK-630 close-in defense system on warships.

Unlike the American M61 Vulcan rotary cannon, the GSh-6-30 does not use hydraulic rotation but rather pneumatic rotation, allowing it to reach its maximum rate of fire in a shorter time. This provides an advantage in air combat, where pilots have very little time to fire at targets. The theoretical rate of fire of the GSh-6-30 is approximately 4,000-6,000 rounds per minute.

The GSh-6-30 was primarily installed on MiG-27 attack aircraft. However, its weakness was its excessive recoil. Although the designers had to mount the gun at an angle to the aircraft's fuselage to reduce recoil, the GSh-6-30 was still considered too noisy and often vibrated strongly when firing, severely affecting the MiG-27's airframe, causing fuel tank cracks, and damaging electronics and communication equipment.

The GSh-6-30 has strong vibrations.They also frequently broke the landing lights of MiG-27 attack aircraft, forcing them to operate at airfields with strong lighting systems at night.

This cannon was also responsible for jamming or tearing the nose landing gear hatch of the MiG-27, leading to at least three emergency landings, and even causing the cockpit canopy of a MiG-27 to detach in flight.

The large number of shrapnel fragments in each GSh-6-30 round could also cause problems.Each 30x165 mm bullet can damage aircraft within a 200 m radius of the point of explosion, including the aircraft that fired the salvo.

GSh-6-23

The GSh-6-23 can be considered a scaled-down version of the GSh-6-30, using 23x115 mm ammunition. This cannon achieves a firing rate of 10,000 rounds per minute, making it the fastest-firing cannon in the world today. The GSh-6-23 is equipped on the MiG-27, MiG-31, and Su-24 aircraft.

The GSh-6-23 howitzer originally used a belt-fed loading mechanism. However, later variants adopted a conveyor-loading mechanism, where the rounds were independently transported to the loading chamber. The howitzer can use various types of ammunition, including fragmentation, incendiary, armor-piercing, and armor-piercing incendiary rounds.

Following the downing of two Su-24 attack aircraft due to self-destructing missiles in 1983, as well as a series of technical problems, the Soviet Air Force decided to cease using the GSh-6-23 cannon in combat. Currently, Russian Su-24 and MiG-31 squadrons are still equipped with the GSh-6-23 cannon, but without ammunition.