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climbing cruise, climb cruise
climbing cruise, climb cruise Compromise between speed
and range, typically at 1.15 V md planned from published
tables for peak efficiency higher than attainable in
constant-height cruise.
climbing shaft Access hatch and ladder leading from
bottom to top of airship hull.
climb out 1 Loosely, flight from unstick to setting course
(lightplane in VFR).
2 Specif., flight from screen height (35 ft/11 m) to
1,500 ft/460 m. Comprises six segments: 1, 35 ft to gear up
(V 2 ); 2, gear up to FRH (V 2 ); 3, level (accelerate to FUSS);
4, FRH to 5-minute power point (FUSS); 5, level (accelerate
to initial ERCS); 6, to 1,500 ft/460 m (ERCS) (see
NFP).
CLIN Contract line-item number.
clinker-built Marine hull or float constructed from diagonal
or longitudinal planks overlapping at edges.
clinodromic Holding constant lead angle.
clinometer 1 Instrument for measuring angle of elevation,
used in some ceilometers.
2 Pre-1935, a lateral-level flight instrument.
3 Several authorities use * as synonymous with inclinometer.
clip, CLIP 1 Cellular logic image processor.
2 Pack of air-launched missiles loaded as a unit.
clipped wing Aircraft having wing modified by removal
of tips or outer portions (eg for racing).
clipper Clipping (1) circuit.
clipping 1 Limiting positive and/or negative parts of
waveform to chosen level.
2 Mutilation of communications by cutting off or
distorting beginnings and/or ends of words or syllables.
3 Limitation of frequency bandwidth.
4 Reduction of amplification below given frequency.
CLIRCM, Clircm Closed-loop IRCM.
CLK Clock, clock time.
CLL Centreline lighting provided.
C L M Centreline (major axis) of missile.
CLMA Contact localization and mission analysis
(ASW).
CL max Maximum attainable lift coefficient.
Clnc, CLNC Clearance (UK), hence Clnc Del, for
delivery.
CLNP Connectionless network protocol.
CLNS Connectionless network service.
CLNTS China Lake Naval Testing Station (CA, USN).
CLO 1 Counter-LO (low-observables).
2 Logistics and training command (KL, RNethAF).
CLOAR Common low-observable[s] autorouter
(AFMSS).
clobber To knock out a ground or air target (colloq.).
clocking Precisely aligning groups of rotating airfoils,
especially of turbine stages.
clock rate Precise frequency at which pulses are generated
to control computer arithmetic unit, digital chip or
other device.
CLOS Command to line of sight; can be prefaced by A
= automatic, M = manual or SA = semi-automatic.
close air support, CAS Air attack on targets close to
friendly surface force, integrated with latter’s fire and
movement.
close-controlled interception One in which interceptor is
under continuous ground control until target is within
visual or AI radar range.
cloud-cover satellite
closed-circuit tunnel Wind tunnel which recirculates
given mass of working fluid.
closed-circuit TV Camera/microphone linked to TV
receiver/speaker by wires.
closed competition Procurement competition in which
prices, performances and design details are not disclosed
to rival bidders.
closed cycle See closed thermodynamic cycle.
closed-jet tunnel Tunnel, not necessarily closed-circuit,
in which working section is enclosed by walls.
closed-loop system Dynamic system in which controlled
variables are constantly measured, compared with inputs
or desired values and error signals generated to reduce
difference to zero. Future aircraft will probably have *
cabin-air systems, significantly reducing fuel burn.
closed thermodynamic cycle Cycle which can transfer
energy but not matter across its boundary. Thus, the
working fluid recirculates endlessly, a system achieved in
APUs but not for aircraft propulsion.
close flight plan To report safe arrival to appropriate
ATC authority and thus terminate flight plan. (Failure to
close may trigger emergency.)
close hangar doors! Stop talking shop (RAF, colloq.).
close out 1 To seal spacecraft, esp. manned; task
performed by ad hoc ** crew who are last to leave pad
area.
2 To complete manufacturing programme.
close parallel operation Runways less than 200 m [656 ft]
apart.
closest approach 1 Time, location or separating distance
at which two planets are closest.
2 Same for fly-by spacecraft.
close support See close air support, CAS.
closet Above-floor bay or compartment for carry-on
baggage or folded wheelchairs.
closure Relative closing velocity between two air or
space vehicles.
clot Idiot (RAF colloq.).
cloud Large agglomeration of liquid droplets (water in
case of Earth) or ice crystals suspended in atmosphere.
cloud absorption Absorption of EM radiation by planetary
cloud depends on cloud structure, size and EM
wavelength, long waves reflected from planet surface
being strongly absorbed even by thin layers.
cloud amount Estimated as apparent coverage of celestial
dome, as seen by observer; originally estimated in
tenths, now expressed in oktas and written in symbolic
form on met chart.
cloud attenuation Reduction in strength of microwave
or IR radiation by cloud, usually due to scattering rather
than absorption.
cloud banner See banner cloud.
cloud break approach Final approach beginning in cloud
and ending in visual contact (though possibly with precipitation).
cloud chamber Sealed chamber filled with saturated gas
which, when cooled by sudden expansion, gives visible
track of fog droplets upon passage of ionising radiation
or particle.
cloud/collision warning See weather radar.
cloud cover See cloud amount.
cloud-cover satellite Satellite equipped to measure by
spectral response cloud cover on Earth or planet below.
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