| J |
|
| |
|
| JAA
|
(European) Joint
Airworthiness Authorities
|
| JAR
|
(European) Joint
Airworthiness Requirements
|
| JASDF
|
Japan Air Self-Defence
Force
|
| JASSM
|
joint air-to-surface
stand-off missile
|
| JAST
|
Joint Advanced Strike
Technology (USAF/USN)
|
| JATO
|
jet-assisted take-off
(inaccurate though still widely used reference to rocket-assisted take-off)
|
| JCS
|
Joint Chiefs of
Staff (US)
|
| JDAM
|
joint direct attack
munition
|
| Jet
A-1 |
turbine kerosine,
standard aviation fuel
|
| JGSDF
|
Japan Ground Self-Defence
Force
|
| JHSU
|
Joint Helicopter
Support Unit
|
| JIT
|
just in time
|
| JMC
|
Joint Maritime Course
|
| JMSDF
|
Japan Maritime Self-Defence
Force
|
| joined
wing |
tandem wing layout
in which the wingtips of forward and aft wings meet, forming a diamond-shaped
planform
|
| Joint
STARS |
Joint Surveillance
& Target Attack Radar System (US, mounted in Boeing/Grumman E-8
airframe)
|
| JP
|
Jet Propulsion/Propelled
(used for designation of different grades of aviation fuel -- see below)
|
| JP-1
|
original kerosine
or Avtur, replaced by Jet A-1 (NATO F35)
|
| JP-2
|
improved kerosine, soon obsolete
|
| JP-3
|
original wide-cut
kerosine and gas oil fractions
|
| JP-4
|
widely used aviation fuel, Avtag or NATO F40
|
| JP-5
|
denser high-flash
kerosine, Avcat or NATO F44
|
| JP-6
|
a 'heart-cut distillate'
with good thermal stability
|
| JP-7
|
fuel specifically
produced for Mach 3 extreme high-altitude aircraft such as the SR-71
|
| JPATS
|
Joint Primary Aircraft
Training System (USAF/USN- includes Raytheon T-6A Texan II aircraft
plus all ground-based training aids)
|
| JPT
|
jetpipe temperature
|
| JSF
|
Joint Strike Fighter
|
| JSOR
|
Joint Services Operational
Requirement
|
| JSOW
|
joint stand off
weapon
|
| J-STARS
|
see Joint STARS
|
| JTDE
|
Joint Technology
Demonstrator Engine (USAF/USN)
|
| JTIDS
|
Joint Tactical Information
Distribution System
|
|
JTS |
Joint Training Squadron
(USAF/USN)
|
| |
|
| K |
|
| |
|
| KEPD
|
kinetic energy penetrator
dispenser
|
| Kevlar
|
aramid fibre used
in high-strength composite materials
|
| KFP
|
Korean Fighter Programme
(South Korea - local assembly by KAI of F-16C/D kits)
|
| KIAS
|
knots indicated
airspeed
|
| KLu
|
Koninklijke Luchtmacht
(Royal Netherlands Air Force)
|
| kN
|
kiloNewton (approx
224.8lb)
|
| Krüeger
flap |
flap on leading edge of wing undersurface which hinges down and
forward from below on high speed wing
|
| kts
|
knots: one knot represents a speed of one nautical mile (6,080ft
or 1,853m) per hour |
| kW
|
kiloWatt (approx
1.34hp)
|
| |
|
| L |
|
| |
|
| LAAAS
|
Low Altitude Airfield
Attack System
|
| LABS
|
low-altitude bombing
system (ie toss bombing)
|
| LAC
|
Leading Aircraft(s)man
|
| LAH
|
Light Attack Helicopter
|
| LAMPS
|
Light Airborne Multi-Purpose
System (USN; the LAMPS Mk I was the Kaman SH-2D Seasprite; the Mk III
is the Sikorsky SH-60B Seahawk)
|
| LANTIRN
|
Low Altitude Navigation
and Targeting Infra-Red for Night (Martin Marietta)
|
| LAPES
|
Low Altitude Parachute
Extraction System (USAF)
|
| LASER
|
Light Amplification
by Stimulated Emission of Radiation
|
| Lat
|
latitude
|
| Long
|
longitude
|
| LAU
|
LAuncher Unit (US)
|
| LBA
|
LuftfahrtBundesAmt
(German civil aviation authority)
|
| LBH
|
Light Battlefield
Helicopter
|
| LCA
|
Light Combat Aircraft
(India)
|
| LCD
|
liquid crystal display
|
| LCG
|
Load Classification
Group
|
| LCH
|
Light Combat Helicopter
|
| LCN
|
load classification
number (representing the peak bending moment imposed by an aircraft
on the supporting pavement)
|
| L/D
|
lift/drag ratio
(a measure of aerodynamic efficiency, reaching around 45:1 for sailplanes)
|
| LDA
|
landing distance
available
|
| LDGP
|
(1) laser designated
general purpose or (2) low-drag general purpose (relating to bombs in
both cases)
|
| LED
|
light-emitting diode
|
| LERX
|
leading edge root
extension (BAe)
|
| LEX
|
leading edge extension
(US)
|
| LGB
|
laser-guided bomb
|
| LH
|
Light Helicopter
|
| LHA
|
large helicopter
assault carrier (USN)
|
| LHTEC
|
Light Helicopter
Turbine Engine Company (formed by Allison and Garrett for T800 programme)
|
| LHX
|
Light Helicopter
Experimental (US)
|
| LID
|
lift-improvement
device (refers to ventral strakes on AV-8B)
|
| LIFEX
|
life extension
|
| lift
dumper |
flat plate, usually of wide span and short chord, raised from wing
upper surface after landing to destroy lift |
| LLGB
|
launch & leave
guided bomb
|
| LLGB
|
low-level guided
bomb
|
| LLLGB
|
low-level laser
guided bomb
|
| LLTV
|
Low-Light TeleVision
|
| LMTR
|
laser marker &
target ranger
|
| LO
|
low observable (technology)
|
| LO-LO-LO
|
mission profile
in which ingress, attack and egress are all undertaken at low level
|
| load
factor |
(1) number of passengers actually being carried as a percentage
of those available or (2) the net lift on the aircraft, expressed as
a multiple of its weight
|
| localiser
|
steering guidance
element of an ILS system
|
| LOH
|
light observation
helicopter
|
| LoI
|
Letter of Intent;
formal letter from customer giving notice of intent to purchase, prior
to negotiation of contract
|
| longeron
|
principal fore and
aft structural member
|
| look-down
shoot-down |
ability to destroy
low-flying target from high altitude
|
| LORAN
|
LOng Range Aid to
Navigation
|
| LOROP
|
LOng-Range Oblique
Photography
|
| LOS
|
line of sight
|
| LOTEX
|
Life-Of-Type EXtension
|
| low
observables |
materials and structures
designed to reduce aircraft signature
|
| LOX
|
liquid oxygen
|
| LP
|
low pressure
|
| LPI
|
low probability
of intercept (stealth radar)
|
| LRCA
|
Long-Range Combat
Aircraft
|
| LRGB
|
long-range glide
bomb
|
| LRMP
|
Long-Range Maritime
Patrol
|
| LRMTS
|
laser ranging and
marked target seeker
|
| LRPA
|
Long-Range Patrol
Aircraft
|
| LRU
|
line-replaceable
unit
|
| LTD
|
laser target designator
|
| LWR
|
laser warning receiver
|
| LWF
|
lightweight fighter
|
| LZ
|
landing zone
|
