A gunship is a military aircraft armed with heavy guns, primarily intended for attacking ground targets.
World War II aviation
During 1942 and 1943, the lack of a usable escort fighter for the United States Army Air Forces in the European Theatre of Operations led to experiments in dramatically increasing the armament of a standard Boeing B-17F Flying Fortress, and later a single Consolidated B-24D Liberator to each have 14 to 16 Browning AN/M2 .50 cal machine guns as the Boeing YB-40 Flying Fortress and Consolidated XB-41 Liberator "heavy fighters" respectively; each meant to accompany regular heavy bomber formations over occupied Europe on strategic bombing raids for long-range escort duties. The YB-40 was sometimes described as a gunship, and a small 25-aircraft batch of the B-17-derived gunships were built, with a dozen of these deployed to Europe; the XB-41 remained a prototype only.
During World War II, the urgent need for hard-hitting attack aircraft led to the development of the heavily armed gunship versions of the North American B-25 Mitchell. The 405 examples produced of the B-25G variant were armed with a 75 mm (2.95 in) M4 cannon and the thousand examples produced of the B-25H followed - which also moved the dorsal turret forward to a location just behind the cockpit - with a lighter T13E1 cannon of the same caliber. The most-built B-25J variant (which retained the B-25H's forward-mount dorsal turret) omitted such heavy-calibre weaponry, but could in some cases, carry an impressive total of eighteen "Ma Deuce" AN/M2 Browning .50-cal machine guns, more than any other contemporary American aircraft: eight in the nose, four in under-cockpit conformal flank-mount gun pod packages, two in the dorsal turret when aimed directly forward, one each in the pair of waist positions, and a pair in the tail—with fourteen of the guns either permanently aimed forward, or aimable directly forward in the dorsal turret—relocated to a forward position for both the -H and -J subtypes as produced—for strafing missions. Later the B-25J was additionally armed with eight 5 in. (130 mm) high velocity aircraft rockets (HVAR).
Similar attempts by the British and Germans to create twin-engined gunships carrying similarly heavy cannon-style ordnance resulted in the seventeen examples built of the de Havilland Mosquito FB Mk XVIII, bearing an auto-loader equipped aviation version of the 57mm calibre Ordnance QF 6-pounder; and the sizable number of German Zerstörer heavy fighter types using examples of the Bordkanone heavy-calibre guns: in contrast to the handful of "tankbuster"-dedicated Kanonenvogel Ju 87Gs, armed with the BK 3,7 twin 37mm autocannon in underwing gun pods, aircraft like the Ju 88P were used for both "tankbuster" and bomber destroyer duties as gunships, using all three calibre sizes (37, 50 and 75mm) of the Bordkanone series ordnance in its four known subtypes, while the Umrüst-Bausatz /U4 factory conversion package for the Me 410 Hornisse armed it with the same BK 5 cannon 50mm calibre ordnance as the Ju 88P-4 used, almost solely for bomber destroyer duties. None of the German twin-engined gunship types were "produced" or converted in large numbers.
Post-World War II aviation
In the more modern, post-World War II fixed-wing aircraft category, a gunship is an aircraft having laterally-mounted heavy armaments (i.e. firing to the side) to attack ground or sea targets. These gunships were configured to circle the target instead of performing strafing runs. Such aircraft have their armament on one side harmonized to fire at the apex of an imaginary cone formed by the aircraft and the ground when performing a pylon turn (banking turn).
As the first notable case of the now-standard use of gunship, in 1964, during the Vietnam War, the popular Douglas C-47 Skytrain transport was successfully modified by the United States Air Force with side-firing Miniguns for circling attacks. At the time the aircraft was known as "dragonship" or "Puff, the Magic Dragon" (officially designated FC-47, later corrected to AC-47). It was the later and larger Lockheed AC-130 Gunship II that became the modern, post–World War II origin of the term gunship in military aviation. These heavily armed aircraft used a variety of weapon systems, including 7.62 mm GAU-2/A Miniguns, 20 mm (0.787 in) M61 Vulcan six-barrel rotary cannons, 25 mm (0.984 in) GAU-12/U Equalizer five-barreled rotary cannons, 30 mm Mk44 Bushmaster II chain guns, 40 mm (1.58 in) L/60 Bofors autocannons, and 105 mm (4.13 in) M102 howitzers. The Douglas AC-47 Spooky, the Fairchild AC-119, and the AC-130 Spectre/Spooky, were vulnerable, and meant to operate only after achieving air superiority. Smaller gunship designs such as the Fairchild AU-23 Peacemaker and the Helio AU-24 Stallion were also designed by the United States during the Vietnam War. These aircraft were meant to be cheap and easy to fly and maintain, and were to be given to friendly governments in Southeast Asia to assist with counter-insurgency operations, eventually seeing service with the Khmer National Air Force, Royal Thai Air Force, and Republic of Vietnam Air Force as well as limited use by the United States Air Force.
AC-47 gunship - one minigun points out the cargo door, and one each points out of the two windows forward of the door.
Underside of a USAF AC-130U; note the 25mm, 40mm and 105mm guns; and sensors.
Closeup of a USAF AC-130 gunship's twin 20mm Vulcans.
Closeup of a USAF AC-130 gunship's 40mm Bofors and 105mm Howitzer
A USAF AC-130 gunship fires one of its weapons during twilight operations in 1988.
Renewed interest in the concept of gunships has resulted in the development of a gunship variant of the Alenia C-27J Spartan. Although the United States Air Force decided not to procure the AC-27J, other nations including Italy have chosen the aircraft for introduction. Additionally, in 2013 the US Air Force Special Operations Command reportedly tested a gunship version of the C-145A Skytruck armed with a GAU-18 twin-mount .50-calibre machine gun system.
Early helicopter gunships also operated in the side-firing configuration, an early example being the Aérospatiale Alouette III. During the Overseas wars in Africa in the 1960s, the Portuguese Air Force experimented to install M3 Browning .50 caliber machine guns in a side-firing twin-mounting configuration in some of its Alouette III helicopters. Later, the .50 caliber machine guns were replaced by a MG 151 20mm cannon in a single mounting. These helicopters were known in Portuguese service as "helicanhões" (heli-cannons) and were used in the escort of unarmed transport helicopters in air assault operations and in the fire support to the troops in the ground. The South African and Rhodesian air forces later used armed Alouette III in similar configurations as the Portuguese, respectively in the South African Border and Rhodesian Bush wars.
During the Vietnam War, the ubiquitous Bell UH-1 Iroquois helicopters were modified into gunships by mounting the U.S. Helicopter Armament Subsystems—these were forward-firing weapons, such as machine guns, rockets, and autocannons, that began to appear in 1962–1963. Rotary-wing aircraft (helicopters) can use a variety of combat maneuvers to approach a target. In their case, the term gunship is synonymous with heavily armed helicopter. Specifically, dedicated attack helicopters such as the Bell AH-1 Cobra also fit this meaning. In any case, the gunship armaments include machine guns, rockets, autocannons, missiles, etc.
The Soviet Mil Mi-24 (NATO code name: Hind) is a large, heavily armed and armored helicopter gunship and troop transport. It was introduced in the 1970s and operated by the pre-1991 Soviet Air Force and its successors post-1991, and more than 30 other nations. Its armaments include machine guns, rockets, cannons, missiles, etc. Its fuselage is heavily armored and is designed to withstand .50 caliber (12.7 mm) machine gun fire. Its armored cockpits and titanium rotor head are able to withstand 20 mm cannon hits.
Mil Mi-24 gunship
- Fixed wing
- Basler BT-67
- Douglas AC-47 Spooky
- Fairchild AC-119 Stinger
- Lockheed AC-130
- Fairchild AU-23 Peacemaker
- Helio AU-24 Stallion
- Airbus AC-235
- Airbus AC-295
- Aérospatiale Alouette III variants
- SA 330 Puma in the "Pirate" variant (Pirate is the official nickname for helicopters with side-mount armament in the French Army)
- Boeing AH-6
- Boeing ACH-47 Chinook
- Bell OH-58 Kiowa variants
- Bell UH-1 Iroquois variants
- Mil Mi-24
- SikorskyMH-60L Direct Action Penetrator (DAP)
- Associated Press (February 14, 2015), Mystery photo unseen for 30 years may show Civil War gunship, Fox News
- Dorr 2011.
- Merriam 2000.
- North American B-25B Mitchell Factsheet.
- Skaarup 2012, p. 265.
- Ballard 1982, p. 9.
- Hamlin 1970.
- Ballard 1982, p. 84, quote: "... the Air Force decided to substitute Gunship II for the more nautical Gunboat designation".
- "The AC-119 Gunships".
- "AC-130H Spectre, AC-130U Spooky". FAS.org.
- "Italian Air Force To Launch Gunship C-27J".
- "The Air Force Tested a Mini-Gunship Last Year".
- Stringer 2006, p. 124.
- Dunstan 2003.
- Bishop 2006.
- Mil Mi-24 Hind Gunship. By Alexander Miladenov. Osprey Publishing 2010. Pages 4–10.
- OPFOR WORLDWIDE EQUIPMENT GUIDE
- Puma helicopters armed with 20mm canon in Central African Republic Les hélicoptères Puma armés de canon de 20 mm en Centrafrique (in French)
- Ballard, Jack S. (1982). "Development and Employment of Fixed-Wing Gunships, 1962–1972" (PDF). Air Force Historical Studies Office. p. 9. Retrieved 7 February 2011.
- Bishop, Chris (2006). HueyCobra Gunships. pp. 3–5. ISBN 9781841769844.
- Dorr, Robert F. (July 2, 2011). "Brilliant Mistakes: The YB-40". defensemedianetwork.com. Retrieved April 23, 2012.
- Dunstan, Simon (2003-08-20). Vietnam Choppers (Revised Edition): Helicopters in Battle 1950–1975. pp. 25–27. ISBN 9781841767963.
- Hamlin, Ross E. (1970). "Side-Firing Weapon Systems: A New Application of an Old Concept" (PDF). Air University Review. Retrieved 16 December 2016.
- Merriam, Ray (2000). U. S. Warplanes of World War II. ISBN 9781576381670.
- "NORTH AMERICAN B-25B MITCHELL factsheet". National Museum of the United States Air Force.
- Skaarup, Harold (2012). California Warplanes. p. 265. ISBN 978-1-4759-0144-3.
- Stringer, Kevin D. (2006). Military Organizations for Homeland Defense and Smaller-Scale Contingencies. Praeger Publishers. p. 124. ISBN 0-275-99308-6.