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ATR 52
The ATR 52 was a 1990s project by the French-Italian manufacturer ATR for a 50-seat airliner and military transport, abandoned for lack of customer interest.
ATR 72
The ATR 72, also known as the Aérospatiale ATR-72, is a French-Italian twin-turboprop regional airliner, a stretched ATR 42 seating about 70 passengers, first flown in 1988.
Attack helicopter
Attack helicopter (NATO designation AH): a military rotorcraft purpose-built to employ guided anti-armor, air-to-ground, or air-to-air weapons with integrated fire control. Key types: AH-1 Cobra, AH-64 Apache, Mi-28, Ka-52, Tiger, WZ-10; distinct from armed utility or scout helicopters.
Attitude indicator
The attitude indicator, also called the artificial horizon or gyro horizon, is a flight instrument showing an aircraft's pitch and bank, first produced by Sperry in 1929 for blind flying.
August Raspet
August "Gus" Raspet (1913–1960) was an American aerodynamicist at Mississippi State whose drag reduction research carried the United States to world leadership in sailplane design.
Aurora (aircraft)
Aurora, also known as SR-91, is the name given to a rumored American hypersonic spyplane that first appeared in a 1985 Pentagon budget document and was never confirmed to exist.
Autogyro
An autogyro, also called a gyrocopter or gyroplane, is a rotorcraft lifted by an unpowered spinning rotor that cannot hover, first flown by Juan de la Cierva in 1923.
AutoGyro Calidus
The AutoGyro Calidus is a two-seat enclosed-cabin tandem gyroplane produced by AutoGyro GmbH of Germany, released in 2009 as the world's first formally certified factory-built gyroplane of this configuration.
AutoGyro GmbH
AutoGyro GmbH is a German gyroplane manufacturer based in Hildesheim, Lower Saxony, founded in 2003, which has delivered more than 3,200 aircraft in over 40 countries.
Autoland
Autoland (Autolanding) is an aircraft system that lands a plane without pilot control using ILS or GPS guidance, certified for low-visibility Category II and III operations.
Automatic Dependent Surveillance–Broadcast
Automatic Dependent Surveillance–Broadcast (ADS-B) is an aircraft surveillance technology in which aircraft broadcast their GPS-derived position, altitude, and speed once per second to ground stations and nearby aircraft.
Autopilot
An autopilot, also known as an automatic pilot, is a system that controls an aircraft's attitude and direction using electrical, hydraulic, or digital systems, correcting errors automatically.
Autorotation
Autorotation is an unpowered rotorcraft flight state where the main rotor turns from upward airflow as the aircraft descends, letting a helicopter glide to a landing after engine failure.
Autothrottle
An autothrottle, called autothrust on Airbus aircraft, is an aircraft system that automatically controls engine thrust to hold a target speed or thrust without continuous pilot action.
Auxiliary power unit
An auxiliary power unit (APU) is a small gas turbine, usually in an airliner's tail, that supplies power and air when the main engines are off and starts them.
Avare
Avare is a free, open-source moving-map aviation GPS and electronic flight bag app for Android devices, developed by volunteer nonprofit Apps4Av and first released in 2012.
Aviation Industry Corporation of China
Headquartered in Beijing, Aviation Industry Corporation of China (AVIC) is a state-owned Chinese aerospace and defense conglomerate that is one of the major producers of military and civilian aircraft.
Aviation transponder interrogation modes
Aviation transponder interrogation modes are the standard formats of 1030 MHz signals sent to aircraft transponders, which reply on 1090 MHz with identity, altitude, or selective data.
Avid Flyer
The Avid Flyer is a two-seat, strut-braced high-wing experimental amateur-built kit aircraft with folding wings, designed by Dean Wilson in Idaho and first flown in 1983.
Avio Aero
Avio Aero is an Italian aerospace company founded in Turin in 1908, a subsidiary of GE Aerospace since 2013, making engine components and turboprops for civil and military aviation.
Avionics
Avionics is the collective term for the electronic systems used on aircraft, including flight controls, cockpit displays, communications, navigation, and surveillance, plus the computers and data networks that tie them together.
Avro
Avro (A. V. Roe and Company) was a British aircraft manufacturer founded by the Roe brothers in Manchester in 1910, best known for the Lancaster and Vulcan bombers.
Avro Canada VZ-9 Avrocar
The Avro Canada VZ-9 Avrocar, also called the VZ-9AV, was a disc-shaped experimental VTOL aircraft built by Avro Canada in the late 1950s for the US military.
Axial compressor
An axial compressor is a compressor in which air flows parallel to the axis of rotation through alternating rotor and stator blades, used in jet engines.
B-HNL
B-HNL is the registration of the first Boeing 777 ever built, which tested the type from 1994, flew for Cathay Pacific for 18 years, and retired to a museum in 2018.
BAC One-Eleven
The BAC One-Eleven, usually written BAC 1-11, was a British short-range twin-jet airliner built by the British Aircraft Corporation, seating up to 119 passengers from 1965.
Balloon (aeronautics)
A balloon is a lighter-than-air, engineless aircraft that flies by gas buoyancy or an airborne heater, first flown in France in 1783 and still used for recreation, weather, and research.
Bartini Beriev VVA-14
The Bartini Beriev VVA-14 (ВВА-14) was a Soviet experimental vertical take-off amphibious anti-submarine aircraft designed by Robert Bartini and built at Beriev in Taganrog, first flying in 1972.
Basler BT-67
The Basler BT-67, made by Basler Turbo Conversions of Oshkosh, Wisconsin, is a turboprop transport built by remanufacturing Douglas DC-3 and C-47 airframes with new engines.
Baykar Bayraktar TB2
The Bayraktar TB2 is a Turkish medium-altitude armed reconnaissance drone made by Baykar, in Turkish service since 2014 and known for combat use in Libya, Nagorno-Karabakh, and Ukraine.