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loclad
threading fatigue-free wire through their heads to apply
torque opposing movement.
loclad Low-cost low-altitude dispenser.
Locom Low-cost manufacturing [AMS adds of
advanced metal structures].
LOC1 First level of capability (ACCS).
locpod Low-cost powered off-boresight dispenser.
LOCR Low-observables combat readiness (USAF).
Locus Laser obstacle-cable unmasking system (helo).
locus Path traced out by moving object, esp. one
rotating in complex repeated orbit, eg tip of helicopter
rotor blade.
Locusp Low-cost uncooled sensor prototype.
LOD Light-off detector.
LODA Letter of deviation authority (FAA).
Lodals Long Odals.
LODE Large optics demo experiment.
LOE 1 Level of effort.
2 Loft- and line-oriented evaluation.
LOEC, LO ExCom Low-observables Executive
Committee, decides release of knowledge to partners/
customers (US).
Lo-Erode Concrete with surface reinforced with Meltex
19-11 stainless-steel fibres.
LOF 1 Lift-off.
2 Line of flight.
Lofaads Lo-altitude forward-area air defense system
(USA).
Lofar Low-frequency omnidirectional acoustic
frequency analysis and recording (ASW).
Lo-Flyte Low-observable flight-test experimental.
LOFT Line-oriented flight training.
loft bombing Low-level bomb delivery, also called toss
bombing, etc (see low-angle *).
loft floor Floor on which lofting is carried out.
lofting Plotting full-size exact shapes of airframe, from
which master templates, jigs, tooling, forging and
stamping dies and other large parts can be constructed
and NC tapes prepared.
LOG Liquid oxygen/gasoline.
Log, log Logarithm[ic].
log Large ground-burning target marker (RAF, WW2).
LOGAIR Air Logistics Command (USAF).
Logair Logistics air network.
logarithmic decrement Natural log of ratio of two
successive amplitudes in damped harmonic or other oscillatory
response.
logbook Master history of member of aircrew, aircraft
or other important functioning system in which are
recorded times, events and occurrences.
Logholdair Air logistics message (NATO).
logic Electronic circuits and subcircuits constructed to
obey mathematical laws.
Logmars Logistics applications of [bar code] marking
and reading symbols.
Logo Limitation of government obligation.
Logspark Logistic(al) park, housing 7 days’ fuel,
weapons and maintenance supplies, serving several
STOVL hides.
LOH Light observation helicopter.
Lohmannising Metal dipped in amalgamating salt,
pickled and then plated with two or more protective alloy
coatings.
LOI 1 Lunar orbit insertion.
long lead time
2 Letter of intent to purchase.
loiter 1 To fly for maximum endurance.
2 To fly a standing patrol.
loiter plate Place where helicopters can practise
hovering down to ground level (RAF).
loitering missile Missile which, after launch, can stand
off in the proximity of targets for several hours before
either being guided to a target or self-destroyed by
programmed default.
Lola Low-level [windshear] alert.
Lolex Low-level extraction of parachute-retarded
cargo.
LO/LO Log-on/log-off.
LOM 1 Compass locator at outer marker.
2 Localizer outer marker.
Lomads Low-altitude missile air-defence system.
Lombard Original design of ‘bonedome’, 1947.
Lomcovak Unlimited flight manoeuvre in which aircraft
tumbles about transverse axis whilst travelling sideways
at near-zero airspeed [often mis-spelt Lomcevak].
LOMEZ Low-altitude missile engagement zone.
LOMS Line operations management, or monitoring,
system.
LON Longitude (FAA).
Lone Ranger Detachments by single aircraft throughout
non-Communist world (RAF 1959→).
long, Long Longitude.
long-dated Long lead time, ie must be ordered months
to years in advance of aircraft completion.
longeron Principal longitudinal structural members in
fuselage, nacelle, airship, etc.
longitudinal axis OX axis, from nose to tail; roll axis.
longitudinal bulkhead Major full-depth web in plane of
OX axis.
longitudinal dihedral Angular difference between incidence
of wing and of horizontal tail (latter normally being
less).
longitudinal divergence Oscillation in pitch of increasing
magnitude, leading to dive or stall.
longitudinal force coefficient Component of resultant
wing force resolved along chord; C x = C D cos ∝ C L
sin ∝.
longitudinal oscillation Vibration along longitudinal
axis (chiefly in ballistic rocket vehicles); also known as
pogo effect.
longitudinal plane Any plane of which OX axis is a part.
longitudinal separation Minimum distance or time
between aircraft cleared to same track at same FL.
longitudinal short-period One of the five classic modes of
aeroplane motion: near-constant airspeed, heavily
damped by wing and tailplane/canard.
longitudinal stability Ability to recover automatically to
level flight after sharp dive or climb command; generally,
all stabilities in plane of symmetry. Static * is defined as
tendency to return to trimmed airspeed and AOA
following any mild disturbance, throttle fixed
throughout.
longitudinal velocity “The component velocity along the
longtitudianl axis relative to the air”, (B.S., 1940). This
need not be synonymous with true airspeed.
longitudinal wave One devoid of lateral components (eg
sound).
long lead time Must be ordered months to years before
aircraft completion; sum of contractual delays for item,
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