The GAU-8/A is currently produced by General Dynamics. By absorbing (in compression) the recoil forces, they spread the time of the recoil impulse and counter recoil energy transmitted to the supporting structure when the gun is fired. Sea Vulcan consisted of a 540-round helical drum magazine, a one-piece aluminum turret that can be opened with just a screwdriver, and the main gun. The GAU-8 was created as a parallel program with the A-X (or Attack Experimental) competition that produced the A-10. In January 2012, General Dynamics announced they would be delivering a new version designated GAU-19/B. The GAU-12/U 25mm gatling gun has significant muzzle energy and combat lethality. [2] At this speed it would take 18 seconds of sustained fire to empty the magazine. Armor penetration of Armor-Piercing Incendiary ammunition, BHN-300 RHA, attack angle 30 degrees from vertical: This page was last edited on 21 September 2020, at 09:30. The rate of fire is selectable to be either 1,000 or 2,000 rounds per minute. The Equalizer is also used in the AC-130U Spooky gunship, where one cannon is mounted on the port side, and the U.S. Marine Corps LAV-AD air-defense vehicle. Because the gun plays a significant role in maintaining the A-10's balance and center of gravity, a jack must be installed beneath the airplane's tail whenever the gun is removed for inspection in order to prevent the aircraft from tipping rearwards. [4] In December 1992 the US Navy issued a letter of qualification for GAU-19/A integration and use on naval aircraft. Most recently a self-contained gun pod was developed by Fulcrum Concepts LLC [6], In 1999, the United States sent 28 GAU-19s to Colombia. The GAU-19/A (GECAL 50) is an electrically-driven, three-barrel rotary heavy machine gun that fires the .50 BMG (12.7×99mm) cartridge. The gun is mounted slightly to the port side so that the active firing cannon barrel is at the 9 o'clock position and on the aircraft's center line, with the front landing gear positioned to the starboard side. That gun was canceled in 1999 after protracted development problems, and British Harrier GR7/9s were without gun armament until retirement. [1] In August 2012 the GAU-19/B received a safety confirmation from the US Army Evaluation Center for use on the OH-58D Kiowa Warrior. The Equalizer was also used as the basis for the Sea Vulcan 25, a turret mounted gun for naval ship self-defense, although not as a Close-In Weapon System, as the gun was not automatic nor did it use radar tracking. This configuration also leaves space for the front landing gear, which is mounted slightly off-center on the starboard side of the nose.[17]. The magazine can hold 1,174 ro… All were delivered by the next month. [7], The standard ammunition mixture for anti-armor use is a five-to-one mix of PGU-14/B Armor Piercing Incendiary, with a projectile weight of about 14.0 oz (395 grams or 6,096 grains) and PGU-13/B High Explosive Incendiary (HEI) rounds, with a projectile weight of about 13.3 oz (378 grams or 5,833 grains). It also could have been used on the Army's now cancelled ARH-70.[5]. Also, the presence of a clockworking inertia-driven mechanical fuze in the mid-body, protects the round from shocks, misfires and cookoffs, making it safer to handle and fire. The Humvee armament kit version fires at 1,300 rounds per minute. The GAU-12/U is used by the United States, Italy and Spain, which mount the weapon in their attack jets such as the AV-8B Harrier II, airborne gunships such as the Lockheed AC-130, and land-based fighting vehicles. The GAU-19 takes 0.4 seconds to reach maximum firing rate. [6], The GAU-8/A is extremely accurate and can fire up to 3,900 rounds per minute without complications. The A-10 engines were initially susceptible to flameout when subjected to gases generated in the firing of the gun. Both of the A-X prototypes, the YA-10 and the Northrop YA-9, were designed to incorporate the weapon, although it was not available during the initial competition; the M61 Vulcan was used as a temporary replacement. The GECAL 50 was first manufactured by General Electric, then by Lockheed Martin, and now by General Dynamics. Designed specifically for the anti-tank role, the Avenger delivers very powerful rounds at a high rate of fire. Instead the gun was manually aimed using a digital gun sight and fire control. These factors, when combined with a maximum firing rate of 4,200 shots per minute, provide an effective weapon for a variety of combat missions. [7] Oman is known to use the GAU-19/A mounted on their HMMWVs. [8], "GAU-19/A (GECAL 50) 12.7 mm Gun (United States), Guns - Integral and mounted", "General Dynamics Selected to Develop Turreted Gun System for V-22 Aircraft", General Dynamics Armament and Technical Products, https://fulcrumconceptsllc.com/wp-content/uploads/2017/01/PFS_gp-19_06.pdf, "Memorandum for Correspondents No. It measures 19 ft 5 1⁄2 in (5.931 m) from the muzzle to the rearmost point of the ammunition system, and the ammunition drum alone is 34.5 inches (88 cm) in diameter and 71.5 inches (1.82 m) long. The strakes can easily be removed and the pods attached in their place, serving the same function while adding useful firepower. The British had originally planned a pair of ADEN 25 guns (using the same ammunition as the GAU-12/U, but based on the 30 mm ADEN cannon). The feed system is double-ended, allowing the spent casings to be recycled back into the ammunition drum,[13] instead of ejected from the aircraft, which would require considerable force to eliminate potential airframe damage. [citation needed]. [3] The magazine would be located underneath the cabin floor and could be reloaded in-flight. Intended as a higher-firepower alternative to conventional deck-mounted machine guns and cannon, the weapon employs the Navy's Mk 24 target designator and laser range finder for enhanced accuracy. Muzzle velocity when firing armor-piercing incendiary rounds is 1,013 m/s, almost the same as the substantially lighter M61 Vulcan's 20 mm round, giving the gun a muzzle energy of just over 200 kilojoules. Once completed, the entire GAU-8 assembly (correctly referred to as the A/A 49E-6 Gun System)[4] represents about 16% of the A-10 aircraft's unladen weight. . The gun was developed in the mid-1980s as a cost-effective protection for ships smaller than frigate or corvette or patrol boats, but did not enter this service. [citation needed], RAF and Fleet Air Arm Harriers did not adopt the Equalizer for their Harrier GR7 and GR9s. Early prototypes had six barrels, but a three-barreled configuration is now standard. [11] The seven-barrel carriage assembly itself is driven by the aircraft's dual hydraulic system. The projectiles incorporate a plastic driving band to improve barrel life. In October 2010 General Dynamics began developing the lighter weight GAU-19/B in response to an urgent needs statement issued by the Armed Scout Helicopter Program Office. [18], The average recoil force of the GAU-8/A is 10,000 pounds-force (45 kN),[4][19] which is slightly more than the output of each of the A-10's two TF34 engines of 9,065 lbf (40.3 kN). [8] The PGU-14/B's projectile incorporates a lightweight aluminum body, cast around a smaller caliber depleted uranium penetrating core. The GAU-19/A is designed to accept standard NATO .50 caliber M9-linked ammunition. [18], Some of the GAU-8/A technology has been transferred into the smaller 25 mm GAU-12/U Equalizer, which was developed for the AV-8B Harrier II aircraft. The 30-mm shell has twice the range, half the time to target, and three times the mass of projectiles fired by guns mounted in comparable close air support aircraft. The GAU-8/A is also used in the Goalkeeper CIWS ship weapon system, which provides defense against short-range threats such as highly maneuverable missiles, aircraft, and fast maneuvering surface vessels. The gun is loaded using Syn-Tech's linked tube carrier GFU-8/E 30 mm Ammunition Loading Assembly cart. Power for operating the gun is provided by twin hydraulic motorspressurized from two independent hydraulic systems. [5] GE has also developed the GAU-13/A, a four-barreled weapon using GAU-8/A components, which has been tested in podded form as the GPU-5/A. For use in the AC-130 gunship, the fire rate is limited to 1,800 rounds per minute in order to conserve ammunition and reduce barrel wear. (63kg) GAU-19/B:106 lbs. The General Dynamics GAU-12/U Equalizer is a five-barrel 25 mm Gatling-type rotary cannon. [11] This alone adds 30% to ammunition capacity for a given weight. By April 2011 flight testing had begun and by January 2012, the U.S. Army ordered 30 GAU-19/B versions for use on helicopters. [1] This rate was later changed to a fixed rate of 3,900 rpm. The GAU-19/A is designed to accept standard NATO .50 caliber M9-linked ammunition. [1] Both variants can be configured for an ammunition capacity of 500-1,200 rounds. They are the interface between the gun housing and the gun mount. The feed system is based on that developed for later M61 installations, but uses more advanced design techniques and materials throughout, to save weight. . The four-barrel GAU-22 is carried internally by the F-35A (the CTOL version of the F-35) on the port side of the fuselage, with 180 PGU-47/U APEX rounds. The GAU-12/U is used by the United States, Italy and Spain, which mount the weapon in their attack jets such as the AV-8B Harrier II, airborne gunships such as the Lockheed AC-130, and land-based fighting vehicles. [2] Soon it was recommended as a potential armament for the V-22 Osprey. The six-barreled version was designed to fire 4,000 rounds per minute, and could be adapted to fire up to 8,000 rounds per minute.

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