C

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C FILE: A file containing text source code in the C programming language, which is the first generation of the C language family. The subsequent generations were ANSI C and C++. See also the definition below of the term CPP.

CAA: Civil Aviation Authority, a US governemnt agency that conducted aeronautical research primarily into wing shapes and engine cowling design. Later merged with the CAB to become today's FAA (Federal Aviation Agency).

CAB: Civil Aeronautics Board, a US government agency that was responsible for administering the early aircraft navigation and air traffic control systems. Later merged with the CAA to form today's FAA (Federal Aviation Agency).

CAB FILE: A compressed file in Microsoft "cabinet file" format, sometimes referred to simply as "cab". Similar in concept to a "zip" file but differing in file format.

CANNON: In the context of military aircraft this specifically means a gun that fires exclusively explosive rounds.

CAPTURE: Refers to the ability of an autopilot or electronic navigation instrument to arrive at and then hold some preset aircraft parameter value representing position in 3-space. Thus we speak of "altitude capture", "capturing a radial", and so on.

CARB HEAT: Carburetor heat, applied to ward off carburetor icing, which would otherwise restrict the flow of fuel to a carbureted piston engine.

CARBURETOR ICING: Rime ice that, in conditions of high humidity, builds up in the throat of a carburetor due to the temperature reduction associated with rapid airflow through the carburetor venturi tube. Countered by the application of "carb heat".

CDI: Course Deviation Indicator, the vertical needle on the OBI which indicates deviation from the desired VOR radial

CEILING: The height above earth of the lowest cloud layer reported as broken, overcast or obscuration

CENTER: Air Route Traffic Control Center, or ARTCC, the enroute air traffic control facility

CENTRIFUGAL FLOW: An early type of turbojet engine design in which the compressor feeds air to radially arranged combustion chambers.

CEP: Circular Error Probable. The ground "footprint" for which 50% of bombs, missiles or ICBMs will strike inside the footprint. The footprint may actually be elliptical.

CFG FILE: Configuration file, often referred to simply as a ".cfg". Such files almost always consist of ASCI text and therefore are editable by the Windows Notepad editor.

CFI: Certified Flight Instructor

CFS: Jargon for the Flight Simulator derived product series named "Combat Flight Simulator".

CG: An aircraft's center of gravity.

CLASS-A: Controlled airspace, generally any airspace between 18000' MSL up to and including FL600 (roughly 60000')

CLASS-B: Controlled airspace around the busiest airports, usually including several rings with different altitude limits and extended 20 miles from the center

CLASS-C: Controlled airspace around moderately busy airports, generally in two rings extended out 10 miles and up to 4000 feet

CLASS-D: Controlled airspace around any airport with an active tower, generally extended out 5 miles and up to 2500 feet

CLASS-E: Any controlled airspace that does not all under Class A through D

CLEARANCE DELIVERY: An ATC position that assigns aircraft departure and enroute route assignments, usually in response to a filed flight plan request.

CHORD: The length of a wing cross-section taken perpendicular to the wing's main spar. See also "mean chord".

COFFIN CORNER: Any region of an aircraft or helicopter flight envelope where the margin between success and failure demands superlative flying skills and/or advance planning in order to avoid crashing.

COLLECTIVE: The helicopter control that adjusts the pitch of the rotor blades for vertical control of the aircraft.

COMBAT RADIUS: The useful range of a military aircraft when it is to return to the airbase from which it takes off. Does not take into account an aircraft's "loitering" over enemy territory.

COMPILER: A software tool for translating "source code" to either machine code or an intermediate pseudocode, depending on the purpose of the language in question.

COMPRESSOR STALL: A turbojet engine condition in which disturbed airflow causes the compressor blades to cease compressing air. Usually accompanied by engine backfires.

CONTRAIL: Abbreviation of "condensation trail", the water vapor visible exhaust of a jet engine operating at altitude in extremely cold air. May also consist of ice crystals rather than water vapor.

CONTAINER: A special FS folder structure. See "aircraft container".

COURSE: The intended direction of flight along the ground horizontally

COWL: A streamlined housing for a piston engine. Often referred to as a "cowling".

COWL FLAPS: A system of air-cooled engine cowl trailing edge "petals" that may be opened for increased engine cooling at the expense of increased drag. Usually open while taxiing, usually closed while in flight.

CPP FILE: A text file containing "source code" in the C++ (C Plus Plus) programming language.

CRAB: Crabbing is flying at an angle to the wind in order to maintain a track over the ground that will be straight in spite of the wind. Usually refers to aligning the flight path of a landing aircraft to the runway during a cross-wind landing.

CRITICAL MACH: The mach number at which, for a given aircraft design, transsonic shock waves just begin to impinge on control surfaces. Airliners usually cruise just under critical mach. See "mach number".

CROSSWIND: The crosswind leg is the part of the traffic pattern when the plane flies at right angles to the landing runway at the takeoff end

CROSSWIND LANDING: Making an approach and landing to a runway that is not aligned with the wind direction.

CROSSWIND LANDING GEAR: Landing gear that can be turned into the wind to avoid having to "crab" the aircraft for a cross-wind landing. Most commonly associated with B-52s.

CTAF: Common Traffic Advisory Frequency, a radio frequency used at non-controlled airports for pilots to self-announce their position and intentions

CTSB: The Canadian Transportation Safety Board.

CYCLIC: The helicopter control that tilts the rotor disk to control the direction of flight.




A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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