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LMST
LMST Lightweight multiband satellite terminal.
LMT 1 Local mean time.
2 Locally manufactured tools, made to exact specification
of an OEM.
3 Limit.
LMTR Laser marker and target ranger.
LMU Line monitor unit.
LN Glider, training (USN, 1941–45).
L N 1 N (night) weighted sound pressure level.
2 Confusingly, also the noise level exceeded for N % of
each 24 h.
L-N Line to neutral (AC volts).
l N Horizontal distance from nose of body to c.g..
l n Horizontal distance from NLG ground contact to
c.g..
LN 2 Liquid nitrogen.
LNA Low-noise amplifier [DPL adds diplexer].
LNAV, L-Nav Lateral navigation.
LNC Loran [not necessarily Loran-C] chart.
LNDG Landing.
LNG 1 Liquefied natural gas.
2 Long.
LNH Lunar near horizon.
LNO 1 Limited nuclear option.
2 Liaison officer.
LNP, L NP Noise pollution level, equal to L eq + 2.56 dB
standard deviation.
LNSF Light Night Striking Force.
LNTF Langley National Transonic Facility (US).
LNTWA Low-noise travelling-wave amplifier.
LO 1 Low observables.
2 Local oscillator.
3 Compass locator at outer marker, also LOM.
4 Longitude.
5 Low band.
6 See next.
lo 1 Low level, variously interpreted as 60 m and 200 ft;
minimum practical safe height for transonic attack.
2 Minimum safe height to avoid obstructions, generally
proportional to speed.
L/O 1 Lift-off.
2 Light off.
l.o. Local oscillator.
LOA 1 Letter of offer and acceptance; sometimes
rendered as ‘letter of agreement’.
2 Launch on assessment.
3 Letter of authorization.
4 Line of attack.
LOAD, Load Low-altitude defence [of ICBMs].
load cell 1 Fluid-filled device for generating large forces
accurately, eg in weighing large aircraft.
2 Capsule containing strain gauge or other force transducer
used, eg, in weighing aircraft.
Load classification number LCN.
loadeo Loading of explosive ordnance, structured
procedures also used as basis for inter-unit competition
(USAF).
loader Loads computer main memory, esp. from transit
tape.
load factor 1 Vertical acceleration in g.
2 Stress applied to structural part as multiple of that in
1 g flight (not necessarily same definition as 1).
3 Ratio of failing load to assumed 1 g load in component.
lobe
4 Number of passenger seats occupied as percentage of
those available.
5 Revenue ton-miles (or tonne-km) performed as
percentage of RTM available.
6 Percentage of engine’s maximum power needed for
aircraft to fly (pre-1914).
load history Crucially, a record of the number of times a
particular load [stress, or vertical acceleration] has been
exceeded by particular part.
loading 1 Total aircraft mass divided by wing area (wing
*), span (span *), or total installed power (power *).
2 Volume fraction of composite (FRC) material occupied
by strong fibres.
loading bridge See jetway.
loading chart Permanent guidance chart or diagram
displaying correct locations for airborne loads in transport
aircraft, esp. cargo.
loading coil Inserted inductance, eg to increase electrical
length of aerial [antenna] system.
loading diagram 1 Standard graphical plot of forces in
structural part or assembly.
2 Document with detailed plan of cargo floor and
underfloor holds on which responsible official marks
positions and masses of all cargo and final c.g. position.
loading loop Graphical plot of transport aircraft weights
against % SMC or MAC or distance from datum with fuel
and payload forming closed figures.
loading up Rich extinction of idling piston engine.
load manifest Detailed inventory of cargo on commercial
or military flight. See load sheet.
loadmaster Member of military transport flight crew in
charge of loading and unloading, and para-dropping etc
if undertaken (but not of paratroops).
loadmeter Ammeter, especially on light helicopter.
loadout Total mission load (US).
loadpath Sequence of structural elements carrying a
load. Thus in F-22 * with missile-bay doors open is
different from normal.
load programmer Person in charge of structural fatigue
test.
load ring Rigid hoop to which balloon net and basket
suspension are attached.
LOADS, Loads Low-altitude air defence system.
load sheet Load manifest prepared for each flight by
transport aircraft, also showing distribution of fuel load
and c.g. position.
load spreader Rigid pallet for distributing dense loads
over larger floor area.
load threshold Notional maximum movements per hour
ATC can accept.
load waterline Waterline of marine aircraft at MTO
weight.
LOAL Lock-on after launch.
LOAS Line operations assessment support.
LO-Axi Low observable axisymmetric [N adds nozzle].
LOB 1 Left outboard.
2 Launch operations building.
3 Line of bearing.
lobe 1 One of two, four or more sub-beams that form
directional radar beam from aerial [antenna] with
reflector.
2 One of the (usually symmetrical) plan systems of
regions of most intense noise from jet engine.
3 Eccentric profile of cam.
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