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| l |
Litre(s) (1 litre = 0.264 US Gallon = 0.220
Imperial Gallon) |
| L/D |
Lift/drag ratio; measure of aerodynamic
efficiency |
| LABS |
Low altitude bombing system; aka
'toss bombing' |
| LAH |
Light attack helicopter |
| LAN |
Local area network |
| LANTIRN |
Low altitude navigation and
targeting infra-red at night |
| LAPES |
Low altitude parachute extraction system |
| Laser |
Light amplification by stimulated emission of
radiation |
| LAT |
Latitude |
| LAU |
Launcher unit (US) |
| lb |
Pound, unit of weight (0.454 kg) |
| lbf |
Pounds force (engine thrust rating) |
| lbs |
Pounds;
re: lb |
| LBA |
Luftfahrtbundesamt; German civil aviation
authority |
| LCD |
Liquid crystal display |
| LCG |
Load classification group |
| LCN |
Load classification number; represents maximum
load an aircraft imposes on runway |
| LDA |
Landing distance available |
| LDGW |
Landing weight |
| LED |
Light emitting diode |
| LEO |
Low Earth orbit |
| LERX |
Leading edge root extension |
| LEX |
Leading edge extension |
| LF |
Low frequency |
| LFC |
Laminar flow control |
| LGB |
Laser guided bomb |
| LGT |
Light |
| LH |
Light helicopter |
| LHA |
Large helicopter assault carrier (USN) |
| LifEx |
Life extension |
| lift dumper |
Flat plate, raised from upper surface of wing
after landing to destroy lift |
| LINS |
Laser inertial navigation system |
| LL |
Low lead |
| LLGB |
Launch & leave guided bomb |
| also: |
low-level guided bomb |
| LLLGB |
Low-level laser guided bomb |
| LLL(TV) |
Low light level (TV) |
| LMTR |
Laser marker and target ranger |
| LO |
Low observable |
| load factor |
Number of seats occupied as a percentage of
seats available |
| also: |
nett lift on the aircraft, expressed as a
multiple of its weight |
| localiser |
Directional guidance element of an ILS |
| LOH |
Light observation helicopter |
| LoI |
Letter of intent |
| loiter |
Flight for maximum endurance; significantly
below cruising speed |
| LO-LO-LO |
Mission profile in which ingress, attack and
egress are undertaken at low level |
| LONG |
Longitude |
| Loran |
Long range navigation |
| LOROP |
Long range oblique photography |
| LOS |
Line of sight |
| LoTEx |
Life of type extension |
| LOx |
Liquid oxygen |
| low observables |
Structures and materials designed to reduce
signatures (radar, visual, noise, infrared and emissions from aircraft);
aka 'stealth' |
| LP |
Low Pressure |
| LPC |
Low pressure compressor (jet engine) |
| LPI |
Low probability of intercept (stealth radar) |
| LPT |
Low pressure turbine (jet engine) |
| LRC |
Long range cruise |
| LRGB |
Long range guided bomb |
| LRMP |
Long range maritime patrol |
| LRMTS |
Laser ranger and marked-target seeker |
| LRPA |
Long range patrol aircraft |
| LRU |
Line replaceable unit |
| LSA |
Light sport aircraft |
| LT |
Local time |
| Ltd |
Limited (company) |
| LTD |
Laser target designator |
| LWR |
Laser warning receiver |
| LZ |
Landing zone |