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chromatic aberration
chromatic aberration Rainbow effect caused by simple
lens having different focal length for each wavelength.
chrome steels Steels containing chromium; often also
with vanadium, molybdenum etc.
chromic acid Red crystalline solid, H 2 Cr O 4 , used in
solution as cleaner and etchant, as electrolyte [eg,
Alocrome) for Cr plating and anodising, and for crack
detection.
chromic paint Coating which changes colour (usually
white-grey-blue-black) as temperature increases.
chromium Cr, hard silvery metal taking brilliant polish,
density 7.2, MPt 1,860°C.
Chromoly Alloy steels containing chromium and
molybdenum.
chromosphere Thin (under 15,000 km) layer of gas
surrounding Sun’s photosphere.
chronograph Device for producing hard-copy readout
of variable against time, with particular events recorded,
typically by pen and disc or drum chart.
chronometer Accurate portable clock with spring drive
and escapement.
CHS, CH/S Common hardware and software.
CHT Cylinder-head temperature. A * instrument
usually displays a reading taken from the cylinder thought
to run hottest.
chuck Rotating vice (US “vise”) for gripping tool or
workpiece.
chuck glider Small model glider [not necessarily a toy]
launched by hand.
chuffing Pulsating irregular rocket combustion.
chum Chart update module.
chutai Squadron (J).
chute 1 Parachute (colloq.).
2 Axial/radial ducts around engine periphery to guide
fan air into afterburner or engine airflow through silenced
nozzle.
3 Duct for ventral crew escape or discharge of ECM,
leaflets etc. Not to be confused with escape slide.
CI 1 Chief instructor.
2 Compression, or continuous, ignition.
3 Catalytic ignition [see CIS (6)].
4 Certificate of Interest, signed by intending
purchaser, unless rescinded becomes binding contract
after stipulated period.
5 Cubic inches [strongly deprecated].
6 Configuration item.
7 Cabin interphone.
8 Counter-intelligence.
9 Chief inspector.
10 Competitive intelligence, primarily for multinational
corporations.
11 Control indicator.
12 Continuous improvement.
Ci 1 Cirrus.
2 Curie[s].
ci Cubic inches (not recommended).
CIA 1 Contractor interface agreement.
2 Central Intelligence Agency (US, 1947 on).
3 Commission Internationale d’Aérostation (FAI).
4 Captured in action.
CIAA 1 Consorzio Italiano di Assicurazioni Aeronautiche
[aviation insurers] (office, Rome).
2 Centre International d’Aviation Agricole.
Cigars
CIACA Commission International des Aéronefs de
Construction Amateur (FAI).
CIAM 1 Computerised integrated and automated
manufacturing.
2 Commission Internationale d’Aéromodélisme (FAI).
3 Central Institute of Aviation Motors (R).
CIANA Latin American commission for air navigation
(office Madrid, from October 1926).
CIAP Climatic Impact Assessment Program (US DoT).
CIARA See IAARC.
CIAS Comitato Interministeriale Attività Spaziali (I).
CIASE China Institute of Aeronautic Systems
Engineering.
CIB Controlled image base.
CIC 1 Combat information center (USA, USAF).
2 Commander-in-Chief [UK usage, C-in-C].
3 Corrosion-inhibiting compound.
Cicas Check-in counter allocation system, displays logo
and flight details at each counter.
C(I)CT Completion of interim certification testing.
CICU Central interface control unit.
CID 1 Combat identification.
2 Check-in display.
3 Category-interaction.
CIDA Co-ordinating installation design authority.
Cidef Conseil des Industries de Défense Français
[F-75782 Paris] (F).
CIDIN, Cidin Common ICAO data-interchange
network (Int.).
CIDS 1 Cabin interface [previously intercommunication
or interphone] data, or distribution, system, with
microprocessor control for speakers, lamps, PA, entertainment
systems, safety signs, crew intercom, etc, to
facilitate changes in interior layout.
2 Check-in display system.
CIE 1 Commission Internationale de l’Eclairage
(= ICI).
2 Centro de Investigaciones Espaciales (Arg.).
CIEA Commission Internationale d’Enseignement
Aéronautique (FAI).
CIEM Computer-integrated engineering and manufacturing.
CIF Customs inspection fee (TSA).
CI-F Control indicator, front.
CIFMS Computer-integrated flexible manufacturing
systems.
CIFRR Common IFR room (New York, civil/military).
CIFS 1 Computer-interactive flight simulation.
2 Close-in fire support.
CIG 1 Computer image-generation.
2 Control/indicator group.
3 Commission Internationale de Giraviation (FAI).
4 Ceiling.
CIGAR Many US mnemonics begin: Controls, instruments,
gas, attitude [trim/flaps], run-up [mags., carb. heat,
etc].
Cigar Airborne Cigar.
cigar Aeroplane from which wings have been removed
(colloq.).
cigarette-burning Solid propellant ignited at one end
across entire section and burning towards other end.
Cigars Mnemonic reminding pilot of vital actions
before takeoff: controls, instruments, gas, attitude indicator,
run up, seat belt (US, WW2).
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