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after-flight inspection
or mixture before admission to cylinders of highly blown
PE designed for operation at high altitudes.
after-flight inspection Post-flight inspection.
afterglow 1 Persistence of luminosity from CRT screen,
gas-discharge tube or other luminescent device after
excitation removed (of importance in design of many
radar displays).
2 Pale glow sometimes seen high in western sky well
after sunset due to scattering of sunlight by fine dust in
upper atmosphere.
3 Transient decay of plasma after switching off EM
input power.
Afterm AFTN terminal.
aft-fan engine Turbofan in which the fan is a freerunning
assembly behind the core, driven by a turbine
linked only by the gas flow.
aft flap Auxiliary curved flap mounted behind USB
(Coanda) flap to complete turning of USB flow to beyond
90°.
aft flight deck Rear area of aircraft flight-deck floor
where this is at upper level above main floor. Not necessarily
occupied by aircrew.
AF 3 , AF3 See AFFF.
AFTI 1 Advanced fighter technology integration.
2 Auxiliary fuel-tank integration.
AFTIL Airways Facilities Tower Integration
Laboratory (FAA).
aft limit of CG Rearmost position of CG permitted in
flight manual, pilot’s notes, certification documentation
or other authority. That at which stability in yaw and/or
pitch, and static and manoeuvre margins, are still
sufficiently good for average pilot to handle most adverse
combination of circumstances in safety. CCV concept is
leading to revolution in which much reduced, or negative,
natural stability is held in check by AFCS.
aft-loaded wing Supercritical wing, in which centre of
pressure is exceptionally far aft because of lift generated
by cambered trailing edge.
AFTN Aeronautical Fixed Telecommunications
Network (Int. from 1970).
AFTNS Aircraft flight-track and noise system, displays
3-D position and noise of all aircraft near airport.
AFTO Air Force Technical Order (USAAF, USAF).
AFTRCC Aerospace Flight-Text Radio Co-ordination
Council.
AFTS 1 Advanced Flying Training School.
2 Air/fuel test switch.
3 Aerobatics Flight Training School (Compton Abbas,
UK).
aft wing In oblique-(slew-)wing aeroplane, wing
pointing rearward.
AFU Advanced Flying Unit.
AFUC Average flyaway unit cost [see unit cost].
Afuta Association Française des Usagers du Transport
Aérien (Paris).
AFV 1 Armoured fighting vehicle.
2 Automatic flyback vehicle.
AFVA Association Française de la Voltige Aérienne.
AFW Active flexible wing.
AFWA Air Force Weather Agency (Offutt AFB,
Nebraska).
AFWAL Air Force Wright Aeronautical Laboratory.
AFWC Air Force Wargaming Center (established 1986
at Maxwell AFB).
Agent Defeat
AFWL Air Force Weapons Laboratory.
AFWR Atlantic Fleet Weapons Range.
AFWWS Air Force Weather Weapon System.
AG 1 Air gunner.
2 Availability guarantee.
3 Assault glider (US, WW2).
4 Reconnaissance Wing (G).
5 Antenna group.
6 Adjutant-General (USA).
7 Arrester gear.
A/G Air-to-ground.
A g Minimum resolvable area within patch illuminated
by radar.
AGA 1 Airfields, ground aids and routes, main output
of AIP(1).
2 Air/ground/air communications.
AGACS Automatic ground-to-air communication
system [ = data-link], not yet achieved.
Agard, AGARD Advisory Group for Aerospace
(formerly Aeronautical) Research and Development
(NATO).
AGAQ Association des Gens de l’Air du Québec.
Agars Advanced general-aviation research simulator (at
CAI [1]).
AGAS Affordable guided airdrop system.
Agate Advanced general-aviation transport experiments
(NASA/industry).
Agatha Air/ground anti-jam transmission from helicopter
or aeroplane (F).
AGATMS Action Group for Air Traffic Management
Safety (Europe).
AGB Accessory gearbox.
AGBR Affordable ground-based radar.
AGC 1 Automatic gain control, property of radio
receiver designed to vary gain inversely with input signal
strength to hold approximately constant output.
2 Affinity-group charter.
3 Adaptive gate centroid (radar tracking algorithms).
4 Active generalised control, digital protected FBW
system of Rafale.
5 Active geometry [or geometric] control.
AGCAS Automatic ground collision-avoidance system.
AGCS 1 Advanced guidance and control system[s].
2 Air/ground communication system.
AGCU APU(1) generator control unit.
AGD 1 Axial-gear differential.
2 Air generator drive (ie, windmill).
AGDA Air-sport association (Guatemala).
AGE 1 Aerospace ground equipment (military inventory
category).
2 Auxiliary ground equipment (Sigint).
3 Automated ground equipment (space).
A-gear Arrester gear.
age-hardening Many metal alloys, especially highstrength
aluminium alloys, need time to harden after heat
treatment, usually in order that partial precipitation may
take place; preferably accomplished at room temperature
or chosen higher value.
ageing (US = aging) Time-dependent changes in
microstructure of metal alloys after heat treatment. Some
merely relieve internal stress but most improve mechanical
properties.
Agent Defeat Programme to create an air-delivered
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