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KBU
KBU Keyboard unit.
KC 1 Kill chain[s].
2 Keyboard cursor.
K c Propeller chord-line pitch/diameter ratio.
KCAB Korean (South) Civil Aviation Bureau.
kcal Kilogramme-calorie.
KCAS Knots calibrated airspeed.
KCCU Keyboard-cursor control unit.
KCD Kill-chain development (network warfare).
KCI Kill-chain integration.
KCK Composite sandwich, Kevlar/carbon/Kevlar.
kc/s Kilocycles, ie KHz.
KCT Kill-chain timeline.
K D Induced-drag factor.
KDA Kongelig [Royal] Dansk Aeroklub [Copenhagen
Airport] (Denmark).
KDAR Kleindrohne anti-radar = small harassment
drone (G).
KDC Knock-down components.
KDD K-band dual digital.
KDEP Depth of smoke in thousands of feet.
KDR Kill/detection ratio (ASW).
KDS Keyboard display station.
KE Kenetic energy.
K E Overall buckling coefficient.
Ke Dielectric constant.
KEAS Knots equivalent airspeed.
KE-ASAT Kinetic-energy anti-satellite.
KEBPI Kinetic-energy boost-phase intercept.
keel 1 Principal longitudinal member along ventral
centreline of flying-boat hull or seaplane float.
2 Underside of flying-boat hull or seaplane float.
3 Principal centreline structural member of wing of
microlight and similar aircraft.
4 Internal or external rigid or [in semi-rigid] articulated
longtitudinal member along underside of airship.
keel angle That between transverse line joining keel and
chine and horizontal.
keel area Strictly, projected plan area of keel (2).
2 Loosely, total side area of aircraft below OX axis.
keel section The most-used part of runway, along
centreline.
keel slider Attachment of pilot or load to keel (3), with
ability to slide fore/aft for stability and control.
keelson I-beam forming structural backbone of marine
hull.
KEI Kinetic-energy interceptor.
KEK Kinetic-energy kill; V adds vehicle.
Kelvin Absolute (SI) temperature scale, degree symbol °
not used; absolute zero is 0K, triple point of water [0°C]
is 273.16K, units same as °C. Thus t k = t c + 273.16, = 5 / 9
(t f + 459.67).
Kennelly-Heaviside layer Original name for part of
ionosphere, E-layer.
Kentucky windage Deflection shooting by rule-ofthumb.
KEP 1 Key emitter parameters (PD, PRF, frequency,
etc).
2 Kinetic-energy penetrator.
KEPD Kinetic-energy penetrator and destroyer.
Keplerian orbit Satellite orbit linking two occasions
when observer sees satellite against same point in space.
kerosene Spelling used by Webster, van Nostrand and
most other US dictionaries, by Oxford English Dictionary
KGV
and by General Electric and Pratt & Whitney; kerosine,
chosen by Chambers “ene is older spelling”; Encarta
suggests “ine is US, Can, A, NZ”, also preferred by Rolls-
Royce; former UK name paraffin. Wide range of
petroleum-derived fuels, primarily used for aviation
turbine engines. Homologous hydrocarbon series with
general formula C n H 2n+2 ; first of this series
(methane/ethane/propane/butane) are gases at STP, but
next 11 are liquids (BPt 150-310°C) and form basis of jet
fuels. Over 90 national designations, thus Jet A-1 is
(among other things) DEngRD.2494 in UK, DEF(Aust)
240A, AIR 3405C (Fr), VTL 9130 (G), Gost-1027-67 and
T-1 (R), FSD-M0754 (Sweden), 3-GP-23h (Canada),
BA-PF-3 (Belgium), D1655-70/A-1 (ASTM), F-34
(NATO) and Avtur/FSII (International Service designation).
For this fuel, density 0.796, thus 0.796 kg/l
(c9.6 lb/Imp gal, 8.0 lb/US gal). Other major fuels include
Avcat narrow-BPt fuel with high flash point (originally
for carrier aircraft), Avtur (turbine kerosene, DEngRD
2482, JP-1) and Avtag (turbine aviation gasoline,
arguably not a kerosene), originally called JP-4 and in civil
use JET B. See flame front.
Kerr cell Extremely fast electro-optical shutter based on
glass container of nitrobenzene in electric field.
KET Krypton evaluation technique.
kette Section of three fighter aircraft (G, WW2).
Kevlar Fibre-reinforced composite materials with fibre
properties superior to those of most glasses. Kevlar-49 is
called aramid fibre from resemblance to spider web (trade
name, DuPont).
KEW Kinetic-energy weapon[s], especially for SDI.
key 1 Position at start of letdown to landing, usually hi-
* 15,000ft, lo- * 9,000 ft (US).
2 Tapered pin [suggest = cotter] to lock parts to move
together.
keyed emission CW signal interrupted to convey intelligence.
keying Interrupting current or signal by make/break
switch, eg Morse key.
keying solution Applied to give strong surface bond
prior to application of dope, adhesive, corrosion protection
or other coating.
keys 1 Piano keys.
2 On electronic display, edge keys.
keystroke 1 Input from an edge key.
2 Basic element in electronic-display writing.
KF Kinetic fires.
KFD Key-fill device.
KFI Krüger flaps indicator.
KfR Kommission für Raumfahrttechnik (G).
KFS Kerosene first stage.
KG Kampfgeschwader, bomber wing (G, WW2).
K/G Kevlar/graphite [IPH adds inter-ply hybrid].
kg Kilogramme[s].
k g Helicopter-rotor gust reduced frequency.
KGB State committee for security (USSR, previously
NKVD).
KGC Japanese Science and Technology Agency.
kgf Kilogrammes force or thrust (non-SI).
kgp Kilogrammes force or thrust (poids, pond, puissance).
KGSK Japanese Aeronautical Council.
KGV Kryptographic variable (panel).
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