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cloud deck
cloud deck Cloud layer, esp. visibly dense, seen from
above.
cloud droplet Water or ice particle with diameter
≤0.2 mm.
cloud height Altitude of base.
cloud 9 To be on * = feeling of elation and/or haziness.
cloud point Temperature at which cooling liquid
becomes cloudy.
cloud seeding Scattering finely divided particles into
cloud to serve as nuclei for precipitation (rainmaking).
cloud types Each type has its own entry. They are classified
by numbers giving an indication of danger: cirrus 0,
cirrocumulus 1, cirrostratus 2, altocumulus 3, altostratus
4, nimbostratus 5, stratocumulus 6, stratus 7, cumulus 8,
and cumulonimbus 9.
clover leaf 1 A search pattern in which the aircraft
describes three or more radial leaf patterns, repeatedly
overflying a central point.
2 Cross-section of a solid-propellant rocket motor grain
in the form of a hollow drum with three inward-projecting
radial ridges or walls.
clovers Common low-observables verification system
(USAF).
CLP Club der Luftfahtpublizisten (Austria).
C lp The roll-damping derivative, introduced chiefly to
correct for spanwise variation in α in roll; positive except
perhaps in a spin.
CLR 1 Clearance, or cleared to (given height).
2 Clear sky [≤10% cloud].
3 Compact, long-range (Flir).
CLRC Central Laboratory of the Research Councils
(UK).
CLRS Weather clear and smooth.
CLS 1 Contingency landing site.
2 Cargo loading system [M adds manual] (JARS).
3 Computer loading system.
4 Contractor [or co-operative] logistic system [or
support].
5 Central logging system.
6 Capsule launch system.
CL s Lift coefficient at stall.
C/LS Cruising/loiter speed.
CLSD, Clsd Closed.
CLSU Culham Lightning Studies Unit.
CLT 1 Centreline tracking (ILS/ILM).
2 Customised lead time.
3 calculated landing time.
CLTF Closed-loop transfer function.
CL to Takeoff lift coefficient.
CLTP Connectionless mode transport protocol.
CLTS Combined life time support.
CLU Container/launch unit.
CL U Lift coefficient, unblown.
club layout Pairs of seats facing each other, often with
table between.
club propeller Propeller having stubby coarse-pitch
blades for bench-testing engine with suitable torque but
reduced personnel danger and slipstream.
clue Piece of information, hence: clued up, well
informed; clueless, ignorant (RAF colloq.).
cluster 1 A group of off-the-shelf computers linked
together to create a high-performance (e.g. over 10
teraflops) computing system.
CMC
2 Two or more parachutes linked to support single
load.
3 Several bombs or other stores dropped as group.
4 Several stars or other pyrotechnic devices fired simultaneously
from single container.
5 Several engines forming group controlled by single
throttle.
6 Several rocket motors fired simultaneously to propel
single vehicle.
cluster bomb unit cluster munition.
cluster joint Structural joint of several members not all
in same plane.
cluster munition Container which, after release from
aircraft, opens to dispense numerous bomblets (rarely,
ECM or other payloads).
cluster weld See cluster joint.
clutter Unwanted indications on display, esp. radar
display, due to atmospheric interference, lightning,
natural static, ground/sea returns or hostile ECM.
CLV Crew launch vehicle, partner of future CEV2
(NASA).
C LW Lift coefficient of the wing.
CLX Combat leadership exercise.
CM 1 Command module.
2 Configuration, or context, management (EDP, software).
3 Crew member, thus *1, *2, etc.
4 Cluster [or cratering] munition.
5 Cruise missile.
6 Comsec module.
7 Countermeasure[s].
8 Classified message.
9 Capability Manager (MoD UK).
10 Crew module.
CM Coefficient of pitching moment about half-chord.
This and the next two terms are numerically piching
moment divided by qSb [dynamic pressure, wing area,
wing span].
C m Coefficient of pitching moment about quarterchord;
also rendered C m¼ and C m0.25 .
cm 1 Centimetre[s].
2 Centre of mass of a body.
CMA 1 Central[ized] maintenance application.
2 Common-mode analysis.
3 China Meteorological Administration.
C mac Coefficient of pitching moment about aerodynamic
centre; in US often C mα .
CMAG Cruise-missile advanced guidance.
CMAL Continuously-moving assembly line.
CMATZ Combined military air, aerodrome, traffic
zones.
CMB 1 Continuous monofilament, braided.
2 Concorde Management Board.
3 Cosmic microwave background.
4 Central Medical Board (RAF).
5 Ceiling-mounted bin.
6 Climb, climbing.
CMBRE Common munitions built-in test reprogramming
equipment.
CMC 1 Cruise-missile carrier (A adds aircraft).
2 Ceramic-matrix composite(s).
3 Central maintenance computer [F adds function, S
system].
4 Cheyenne Mountain Complex (USAF).
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