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whiskers
strength is very close to maximum theoretically attainable.
2 Sharpened contact pressed against semiconductor in
point-contact transistor or solid-state diode; hence *
resistance.
3 See next.
whiskers Multiple weak shocks on surface of real body,
through each of which flow is retarded slightly. Hence
whiskering effect.
whisper-shout A sequence of ATCRBS interrogations
and suppressions of varying power levels transmitted by
TCAS equipment to reduce severity of synchronous interference
and multipath problems.
whistle Annoying high-pitched note, usually slightly
varying in pitch, caused by interference carrier in superhet
reception.
whistler RF signal, usually in form of falling note, generated
by lightning; heard on Earth and Jupiter and in
former case bounces to and fro along magnetic-field lines
between N/S hemispheres.
Whitcomb body Streamlined body added to aircraft
(eg wing trailing edge) to improve Area Rule volume
distribution; many other names, eg speed bump,
Küchemann carrot.
White 1 Not black, hence can be disclosed to public.
2 Friendly, as alternative to Blue.
3 Overseeing authority in war game.
white, white hot TV/video mode giving positive (normal)
picture, which in IR display renders hot as white and cold
as dark.
white body Hypothetical surface which does not absorb
EM radiation at any wavelength, ie absorptivity always
zero.
white level Maximum permissible video signal, 100% +
modulation or 0% –.
white noise 1 Strictly, noise having constant energy per
unit bandwidth (Hz).
2 Commonly used to mean spectrum of generally
uniform level on constant-% bandwidth basis (so-called
broadband noise) without discrete-frequency components.
whiteout 1 Loss of orientation with respect to horizon
caused by overcast sky and sunlight reflecting off snow.
2 Zero visibility caused by what one authority calls
ping-pong-ball snow.
White Rating Holder of licence is authorized to land in
cloud base 400 ft, 122 m.
white room 1 Super-clean room in which air is continuously
filtered to eliminate micron-size and larger
particles and special rules almost eliminate introduction
of contaminants by human beings or objects (eg indiarubber,
pencils, handkerchiefs, etc, prohibited).
2 Anechoic chamber.
3 Overseeing authority in war game, esp. in netcentric
warfare.
White Sands Chief USA missile range, large area of New
Mexico; abb. WSMR.
white-scarf syndrome Alleged antipathy towards UAVs
by human pilots (US, esp. USAF).
white smoke Unburned fuel vapour in engine efflux.
white-tailed 1 Not bearing markings of a commercial air
carrier.
2 Available for wet or dry lease with peelable logo and
name.
wide-cut
3 Completed but unsold.
4 Company demonstrator (recently including UAV).
White World Ordinary [not black], especially in manufacturing
industry.
Whitney punch Hand-operated tool for punching holes
of selected sizes in metal sheet.
Whitworth Traditional UK screwthread with radiused
crest and root and 55° angle.
whizzer TV zoom lens.
whizzkid Civilian analyst or adviser in DoD.
whizzo WSO (colloq.).
WHO World Health Organization (UN agency, HQ
Switzerland).
whole-aircraft charter Operator charters complete
aircraft for one flight or for a period, in contrast to split
charter.
whole-body counter Nucleonic instrument for identifying
and measuring body burden (whole-body received
radiation) of human beings and other living organisms.
whole-range distance Horizontal distance between point
vertically below release point and whole-range point.
whole-range point Point on surface vertically below
aircraft at moment of impact of bomb released by it,
assuming constant aircraft velocity (ASCC).
WI 1 Welding Institute (BWRA).
2 Within.
3 Wallops Island, Virginia.
WIA 1 Wounded in action.
2 Women in Aviation (US).
WIAS Weather information and display system.
WIC 1 Warning information correlation.
2 Women, infants and children.
3 Weapons instructor course.
wick 1 See static wick.
2 Throttle(s); eg to turn up * = increase propulsion
power (colloq.). Invariably used for turbine engine(s), esp.
jet(s).
WID Width.
WIDE Projection equipment used in simulator to
generate FOV of 150° × 40° (Redifon); WIDE II, five
projectors for 200°.
Wide Wide-angle infinity display equipment.
wide-area augmentation system Under development
from 1995 to improve GPS accuracy (FAA).
wideband amplifier One offering uniform response over
many decades of frequency.
wideband dipole Large ratio diameter/length.
wideband ratio Ratio of occupied frequency bandwidth
to intelligence bandwidth.
wide body See wide-body aircraft.
wide-body aircraft Commercial transport with internal
cabin width sufficient for normal passenger seating to be
divided into three axial groups by two aisles; in practice
this means not less than 4.72 m (15 ft 6 in) (B.767,
narrowest **).
wide-cut Generalized term for aviation turbine fuels
assembled from wider range of hydrocarbon fractions
than kerosene-type fuels; more accurate term is wide
boiling-point range, for whereas little or no kerosene-type
boils below 174°C, * begins to boil at 52–53° and fractions
continue to boil off at up to about 220°. SG well below
0.76, compared with 0.79–0.8 for kerosene-type fuels.
Widely held to be dangerous because of high volatility
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