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AIFS
AIFS Advanced indirect fire system[s].
AIG Acas implementation group.
Aigasa Associazione Italiana Gestori Aeroporti e
Aeroportuali.
AIGT Aerospace Innovation and Growth Team
[industry and Government] (UK 2004–).
AII 1 Anti-icing/anticing inhibitor.
2 Airspace infungement initiative (Eurocontrol).
AIIDED Active integrated inlet-duct engine demonstration.
AIIS, AI 2 S Advanced IR imaging seeker.
AIL 1 Airworthiness Information Leaflet.
2 Aeronautical Instrument Laboratory (USN, from
1943).
ail Aileron.
AILA Airborne, or automatic, instrument landing, or
instrumented low, approach; S adds system.
ailavator Control surface functioning as aileron and
elevator (see elevon).
aileron 1 Control surface, traditionally hinged to outer
wing and forming part of trailing edge, providing control
in roll, ie about longitudinal axis. Seldom fitted to aircraft
other than aeroplanes and gliders, and in recent years
supplemented or replaced by spoilers, flaperons, elevons
and tailerons, while in some high-speed aircraft
contentional * are mounted inboard to counter * reversal.
2 Effectiveness of lateral-control system, as in phrase
‘to run out of *’.
aileron centring device Another name for a wing leveller.
Typically incorporates two springs, able to overcome
friction and air loads.
aileron drag Asymmetric drag imparted by aileron
deflection, greater on down-going aileron (see differential
*, Frise *).
aileron droop Rigging of manual ailerons so that in
neutral position both are at a positive angle relative to the
wing.
aileron reversal As aircraft speed increases, deflection of
aileron can twist wing sufficiently to reduce, neutralise
and finally reverse rolling moment imparted to aircraft.
Many aircraft designed for Mach numbers higher than 0.9
either have no traditional outboard ailerons or else lock
these except at low speeds.
aileron reversal speed That at which pilot input is
reduced to zero.
aileron roll See slow roll.
aileron wedge See wedge.
AILS 1 Airborne information for lateral spacing.
2 Automatic ILS.
AIM 1 Aeronautical [until 1995 Airmen’s] Information
Manual (FAA).
2 Air intercept missile (inventory category, USAF,
USN).
3 Aerospace industrial modernisation programme
(US).
4 Aluminium/iron/molybdenum.
5 Automatic inflation modulation.
6 Advanced intelligent management.
7 ATC/IFF beacon Mk XII.
8 Accelerated introduction of materials.
9 See AIMD.
10 Aircraft integrity monitoring.
11 Arts (3) interface module.
AIR
AIMAS Académie Internationale de Médecine
Aéronautique et Spatiale [also IAASM; office, Montreal].
aim-bias Error between aiming point and centre of
dispersion area of statistically valid number of projectiles.
AIMD Aircraft intermediate maintenance department.
aim dot Basic command reference symbol in gunsight or
HUD: can show where bullets would hit if gun fired, but
usually also gives other indications.
AIMDS Aircraft integrated monitoring and diagnostic
system.
AIME Autonomous integrity monitored extrapolation.
AIMES Avionics integrated maintenance expert system
(McDonnell Douglas).
Aim/Far Aeronautical Information Manual, Federal
Aviation Regulations.
AIMIS, Aimis Advanced integrated modular instrumentation
systems (USN).
aim-off Angular allowance when firing at moving target
with unguided projectile, usually because of sightline spin
resulting in target changing apparent position during
projectile’s flight, but in air-to-air combat possibly
because of lateral air drag (eg in firing at aircraft abeam
at same speed and heading, when sightline spin is zero).
AIMS 1 Attitude indicator measurement system.
2 ATCRBS, IFF, Mk 12 transponder, System.
3 Aircraft identification monitoring system (DoD,
interceptors).
4 Automated integrated manufacturing system.
5 Airplane, or aircraft, information-management
system [reports problems to maintenance staff].
6 Airborne integrated management system.
7 Airport information management system [vast
range of data].
8 Advanced imaging multispectral system.
9 Aircraft integrated monitoring system [accidentrelated
and life data].
10 Advanced integrated MAD system.
11 Airspace information monitoring system [major
airports, G].
AIMV Aluminium/iron/molybdenum/vanadium.
Aimval Air intercept missile evaluation (USAF/USN).
AIN Airline identification number.
AINS 1 INS with prefix advanced, aided, area or
airborne.
2 Associazione Internationale Nomo nello Spazio (I).
AINSC Aeronautical industry service communications.
AIO Action information organization (mainly
warships, in relation to aircraft).
AIOA Aviation Insurance Offices Association [ office,
Guildford GU2 5QJ] (UK).
AIP 1 Aeronautical Information Publication[s], or
package.
2 Asars, [1], improvement program.
3 Anti-surface-warfare improvement program[me].
4 Air-independent propulsion.
5 Australian industrial participation.
6 Associação Industrial Portuguesa.
7 Airport Improvement Program (DoT).
AIPA Australian and International Pilots’ Association.
AIPPI Association Internationale pour la Protection de
la Propriété Intelectuelle (Int.).
AIPT Advanced image-processing terminal.
AIR 1 French aerospace material specification code.
2 Air intercept[or] rocket (inventory category, USAF).
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