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Combined Defence Services Examination
The Combined Defence Services Examination (CDS) is a twice-yearly UPSC examination selecting graduates for officer training at India's military, naval, air force, and officers' training academies.
Commemoration of the golden age of aviation
Commemoration of the golden age of aviation is the preservation and public celebration of interwar flying using museum displays, airworthy restorations, and replica aircraft.
Commercial pilot licence
A commercial pilot license, called a commercial pilot certificate in the United States, permits the holder to fly an aircraft and be paid for it, sitting above the private certificate.
Competition between Airbus and Boeing
The competition between Airbus and Boeing is the duopoly rivalry in large commercial aircraft, with Airbus leading recent deliveries and a record backlog of 8,754 jets in 2025.
Components of jet engines
The components of jet engines include the inlet, compressor, combustor, turbine, and exhaust nozzle; turbofans add a fan, and afterburners raise thrust by about 40 percent.
Composite airframe
A composite airframe is an aircraft structure whose primary load-bearing components, like fuselage and wings, are built mainly from carbon fiber composites rather than aluminum alloy.
Compressor stall
A compressor stall, also known as compressor surge, is a breakdown of airflow in a gas turbine engine's compressor that causes a loud bang and temporary loss of compression.
Con Air
Con Air is a 1997 American action film directed by Simon West, in which hijacking prisoners on a prison transport plane are opposed by a paroled Army Ranger.
Concorde
Concorde was an Anglo-French supersonic airliner, built by Aérospatiale and the British Aircraft Corporation, that cruised at twice the speed of sound and flew passengers from 1976 to 2003.
Concorde operational history
Concorde operational history covers the Anglo-French supersonic airliner Concorde, operating almost exclusively from 1976 to 2003, cutting transatlantic travel times and briefly serving U.S. routes for Braniff International.
Condor (airline)
Condor, legally Condor Flugdienst GmbH, is a German leisure airline based at Frankfurt Airport. Founded in 1955, it flies over nine million passengers a year to around 90 destinations.
Conformal fuel tank
A conformal fuel tank, sometimes called a slipper tank, is an external aircraft fuel tank shaped to the airframe, adding fuel with low drag while leaving weapon stations free.
Consolidated B-24 Liberator
The Consolidated B-24 Liberator was an American four-engine heavy bomber of World War II, designed by Consolidated Aircraft of San Diego, with about 18,500 built between 1940 and 1945.
Consolidated B-32 Dominator
The Consolidated B-32 Dominator was an American four-engine very heavy bomber built during World War II as insurance against the failure of the B-29 program; only 118 were built.
Consolidated PB4Y-2 Privateer
The Consolidated PB4Y-2 Privateer, also known as the P4Y Privateer, was a four-engine US Navy patrol bomber developed from the B-24 Liberator for long-range maritime patrol from 1944.
Consolidated PBY Catalina
The Consolidated PBY Catalina, also known as the PBY Canso, is an American twin-engine flying boat serving as a patrol bomber and air-sea rescue aircraft from 1936.
Construction of model aircraft
Construction of model aircraft is the craft of building flying model airplanes from balsa, foam, and printed plastic, using commercial kits, drawings, or nearly finished ARF airframes.
Continental Airlines
Continental Airlines was a major US airline founded in 1934 that filed landmark Chapter 11 bankruptcies in 1983 and 1990 before merging into United Airlines in 2010.
Continental Airlines Flight 1713
Continental Airlines Flight 1713 was a flight that crashed on takeoff in a snowstorm at Denver's Stapleton Airport on November 15, 1987, killing 26 of the 82 people aboard.
Continuing airworthiness
Continuing airworthiness is the set of regulatory processes that keep an aircraft compliant with its type certification basis and in a condition for safe operation throughout its life.
Continuous climb operations
Continuous climb operations (CCO) are an aircraft departure technique, guided by ICAO, in which aircraft climb without intermediate level-offs using optimum thrust, saving fuel and emissions.
Continuous descent approach
A continuous descent approach (CDA) is an aircraft arrival technique in which a plane descends from cruise to the runway with mostly idle thrust, saving fuel and cutting noise.
Continuous duty overnight
A continuous duty overnight, or "stand-up" overnight, is an airline trip sequence flown through the night with a crew rest break too short to count as rest.
Contra-rotating propellers
Contra-rotating propellers are a pair of propellers mounted one behind the other on the same axis, turning in opposite directions so the rear one recovers swirl energy as thrust.
Control line
Control line is a method of flying model aircraft tethered to the pilot by two wires, flying in a circle with wrist movement controlling pitch.
Control-line aeromodelling
Control-line aeromodelling is the sport of flying model aircraft tethered to a pilot by two lines from a hand-held handle, introduced in the late 1930s with events including Stunt, Speed, Racing, and Combat.
Control-line aeromodelling competition
Control-line aeromodelling competition is model aircraft flying on wires from the ground, contested in the FAI F2 classes: F2A speed, F2B aerobatics, F2C team racing, and F2D combat.
Controlled flight into terrain
Controlled flight into terrain (CFIT) is an aviation accident in which a serviceable aircraft under crew control is flown unintentionally into terrain, water, or an obstacle.
Controller–pilot data link communications
Controller–pilot data link communications (CPDLC) lets air traffic controllers and pilots exchange standardized, pre-formatted ATC messages by data link, freeing congested voice channels for urgent traffic.
Convair
Convair, also known as Consolidated Vultee, was an American aircraft manufacturer formed in San Diego in 1943 and best known for the B-36 bomber and Atlas missile.