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CRR
CRR Cutover readiness review.
CRRA Capabilities review and risk assessment.
CRS 1 Container release system.
2 Control and reporting squadron (or section).
3 Component repair squadron (US).
4 Computer reservation system.
5 Child restraint system.
6 Congressional Research Service (US).
7 Cosmic-ray subsystem.
8 Not recommended, course.
crs 1 Course.
2 Cruise.
CRT Cathode-ray tube.
CRT display CRT whose electron beam[s] create
pictures and disgrams on the tube-face, a basic element in
radars and, since c1960, flight instruments.
CRTE Combat rescue training exercise.
CRTS CRT scope; term not recommended.
CRU 1 Control routing unit [MIL-1553B].
2 Chemical-resistant urethane.
3 Computer receiver unit.
CRUAV Communications-relay UAV.
crucible Hot source designed for radiating IR, for decoy
or training.
cruciform Having approximate form of a cross, in aerospace
usually when viewed from front; thus * wing missile
has four wings arranged radially (often at 90°) at same
axial position round body.
cruise 1 In any flight from one place to another, that
portion of flight from top of climb to top of descent en
route to destination, usually at altitudes, engine settings
and other factors selected for economy and long life.
2 Verb, to perform (1).
3 Tour of operations by naval air unit aboard carrier.
cruise configuration Describes not only aerodynamic
(normally fully clean) status but also systems status and
possibly location and duties of flight crew, during
cruise (1).
cruise missile Long-range pilotless delivery system
whose flight is wing-supported within atmosphere.
cruise motor Propulsion, of any kind, used to sustain
speed of missile from boost burnout onwards.
cruising altitude That assigned to or selected by captain
for flight from top of climb to top of descent; varies with
type of aircraft, sector distance, take-off weight, ATC
rules and other traffic, winds and other factors.
cruising boost With piston engine, that available in weak
mixture for continuous operation giving best time or
lowest fuel burn.
cruising ceiling Formerly, greatest height at which 1.35
V i-mp could be maintained at max WM cruise power.
cruising speed That selected for cruise (1).
cruising threshold 1.35 V i-mp , considered (1935–50) practical
lower limit to cruising speed.
crutches Lateral arms carrying pads which are screwed
down on upper sides of bomb, missile or other store to
prevent movement relative to rack, pylon or other carrier.
CRV 1 Centre-reading voltmeter.
2 Crew rescue vehicle.
3 Crew-return vehicle.
CR/W Canard rotor/wing.
CRW Circular rotating wing; spinning wing provides
gyrostabilization as well as [in fast forward flight]
adequate lift.
CSA
cryogen See refrigerant.
CryoGenesis Cleaning by blast of air + solid CO 2 [dry
ice].
cryogenic Operating at extremely low temperatures.
cryogenic fuels By far the most important is LNG (liquefied
natural gas), consisting mainly of methane with traces
of ethane and other gases; BPt is about -161°C. LH 2 ,
liquid hydrogen, has the drawbacks of very low density
and exceedingly low BPt (near absolute zero, at -253°C).
cryogenic materials Limited range of highly specialized
materials suitable for sustained structural or other use at
below -180°C.
cryogenic propellants Gases used in liquid state as
oxidants and/or fuels in rocket engines, esp. Lox, LH 2 , Fl
and various Fl compounds or mixtures.
cryoplane Aeroplane designed to use cryogenic fuel.
cryopump High-vacuum pump operating by cooling
chamber walls so that residual gas molecules are
condensed on to them, leaving vapour pressure below that
required.
cryostat Usually small lab rig for experiments at ultralow
temperatures, eg NMR, superconductivity etc.
Cryotech Range of deicer materials, used alone or in
combination with sodium or potassium acetate.
crystal laser One whose lasing medium is a perfectlattice
crystal, eg ruby.
crystal lattice Three-dimensional orthogonal space
lattice whose intersections locate the atoms of a perfect
crystal (except on small scale, most crystals contain
important imperfections).
crystal oscillator One with added subcircuit containing
piezo-electric crystal (eg quartz) whose extremely rigid
response gives high frequency stability.
crystal transducer Transducer containing piezo-electric
crystal which translates mechanical strain into electrical
voltage.
CRZ Cruise.
CS 1 Constant-speed (c/s is preferred).
2 Cassegrain system.
3 Chemical harassing agent OCBM.
4 Certification standard.
5 Or C/S, c/s, callsign.
6 Communications subsystem.
7 Control subsystem (ECM).
8 Colour stripping (baggage screening).
9 Cargo system.
10 Common service.
11 Suffix, close support.
C/S Callsign.
CS 1 Cirro stratus.
2 Caesium.
C s 1 Specific fuel consumption (F).
2 Constant in torsion/bending of tube or box structure,
resistance to rotation caused by warp load.
3 Chord at selected wing station (usually 70 per cent
semi-span).
c/s 1 Constant-speed.
2 Course/airspeed.
3 Cycles per second (Hz is preferred).
4 Centre-section of wing.
5 Callsign.
6 Characters per second.
CSA 1 Canadian Space Agency.
2 Configuration status accounting (software).
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