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cold rating
keeping relatively cool (because rate of carbon deposit
from oil or fuel is very low).
cold rating Cold thrust; rated output of jet engine
without afterburning. Can be MIL.
cold rocket Operating on pressurized gas or monopropellant,
without combustion.
cold rolling Performed on steels to harden and increase
strength, at expense of ductility.
cold round Test missile launched without active propulsion.
Colds Common opto-electronic laser detection system
(detects laser beams and measures angle of arrival).
cold shut Porosity due to premature surface freezing in
casting, or formation of gas bubble in weld.
cold soak 1 Test of complete aircraft by prolonged
exposure to lowest terrestrial temperature available
before flying a mission.
2 Test of cryogenic propulsion system by prolonged
passage of propellant.
cold stream Fan airflow; hence * reverser, one not
affecting core.
cold test Determines lowest temperature at which oil or
other liquid will flow freely.
cold thrust Maximum without afterburner.
cold wave Sudden major fall in surface ambient temperature
in winter.
cold working Forming metal workpiece at room temperature;
increases hardness and often strength but reduces
ductility (increases brittleness).
Coleman theory Derived by NACA’s R. P. Coleman and
A. M. Feingold, basic explanation of ground resonance of
helicopters with articulated rotors; hence such resonance
called Coleman instability.
coleopter Aircraft having annular wing with fuselage at
centre; usually tail-standing VTOL.
collaborative programme Undertaken by industrial
companies in two or more countries as result of legal
agreements between those companies or between their
national governments.
collar Impact-absorbent ring around bottom of balloon
gondola (usually lightweight foamed polystyrene).
collateral damage 1 Refers esp. to injury to friendly eyes
from clumsy use of powerful lasers in warfare.
2 Damage caused to anything other than the intended
target.
collation Selection in correct sequence and stacking in
exact register of pre-cut piles to make part in composite
material.
collective pitch Pilot control in rotary-wing aircraft
directly affecting pitch of all blades of lifting rotor(s)
simultaneously, irrespective of azimuth position. Main
control for vertical velocity. Colloq. = ‘collective’.
collective stick Collective-pitch lever (colloq.).
collector 1 Bell-mouth intake downstream of working
section of open-jet tunnel.
2 Region of transistor between * junction and * connection
carrying electrons or holes from base.
collector cell Small compartment at the inboard end of
a main wing fuel tank, or elsewhere in the tank system
where fuel might collect when fuel nearly consumed,
which will continue to feed even under negative-g.
collector ring Circular manifold collecting exhaust from
cylinders of radial piston engine.
combat load
collimate To adjust optical equipment to give parallel
beam from point source or vice versa.
collimating mark A short line or cross at the mid-point
of each edge of a reconnaissance photo.
collimating tower Carries visual and radio/radar target
for establishing axes of aerials (antennas) with minimal
interference from other electrical fields. Alternatively
collimation tower.
collision-avoidance system Provides cockpit indication
of all conflicting traffic, without latter carrying any
helpful equipment or co-operating in any way, and
increases intensity of warning as function of range and
rate of closure.
collision beacon Powerful rotating visual light, normally
flashing Xenon tube, carried by IFR-equipped aircraft
(normally one dorsal, one ventral).
collision-course interception Aimed at point in space
which target will occupy at a selected future time; interceptor
may approach this point from any direction.
collision-warning radar See weather radar.
collision-warning system See collision-avoidance.
colloidal propellant Having colloidal structure, with
particles never larger than 5 10 -3 mm and apparently
homogeneous to unaided eye.
co-located Two ground navaids, usually VOR and
DME, at the same site.
colours of the day Particular combination, changed
daily, of [usually two] Very [or similar] signal cartridges,
fired to confirm aircraft as friendly to suspicious ground
forces.
colour stripping Removal of all MES (6) colours except
those indicating organic substances such as plastic
explosives.
Colpar Confederacion Latino Americana de Paracaidismo
(sport parachuting, office Argentina).
COLT CO 2 laser technology.
COM 1 Computer output on microfilm (direct
recording).
2 Company operations manual.
3 Acronyms based on Command[er] or communications
[over 50].
4 Cockpit operating manual.
com Communications (FAA = comm).
Comac Cockpit-management computer.
ComAO, COMAO 1 Composite air operation[s].
2 Combined air operations.
comb 1 Rake, usually linear, of pressure heads.
2 IFF aerial (antenna) with linear array of dipoles often
sized to match spread of wavelengths.
combat aircraft Aircraft designed to use its own armament
for destruction of enemy forces; thus includes ASW
but not AEW or transport (definition controversial).
combat air patrol, CAP Maintained over designated
area for purpose of destroying hostile aircraft before latter
reach their targets.
combat camera Colour ciné camera aligned with fighter
armament to film target.
combat control team Air force team tasked with establishing
and operating navaids, communications, landing
aids and ATC facilities in objective area of airborne
operation.
combat fuel tank Combat tank.
combat gross weight See weight.
combat load Aggregate of warlike stores carried
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