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| J |
Joule, unit of energy (SI) |
| JAA |
Joint aviation authorities
(European) |
| JAR |
Joint aviation requirements (European) |
| JAR-FCL |
JAR-flight crew licensing (European) |
| JAR-VLA |
JAR-very light aircraft (European) |
| JASDF |
Japanese Air Self Defence Force |
| JATO |
Jet assisted take-off |
| JCAB |
Japan Civil Airworthiness Board |
| JCS |
Joint chiefs of staff (US) |
| JDA |
Japan Defence Agency |
| Jet A-1 |
Standard aviation fuel, turbine kerosine |
| JGSDF |
Japan Ground Self Defence Force |
| JHSU |
Joint Helicopter Support Unit |
| JIT |
Just in time |
| JMSDF |
Japan Maritime Self Defence Force |
| joined wing |
Tandem wing layout; wingtips of forward and aft
wing meet, creating a diamond-shaped planform |
| joule |
Unit of energy (= 1 Nm = 1 Ws) (SI) |
| JP-1 |
Original kerosine; aka
Avtur; aka NATO F35; replaced by Jet A-1 |
| JP-2 |
Improved kerosine (obsolete) |
| JP-3 |
Wide-cut kerosine and gas oil fractions |
| JP-4 |
Widely used aviation fuel; aka
Avtag; aka NATO F40 |
| JP-5 |
Dense, high-flash kerosine; aka
Avcat; aka NATO F45 |
| JP-6 |
'Heart-cut distillate'; improved thermal
stability |
| JP-7 |
Specifically produced for mach 3 aircraft such
as SR-71 'Blackbird' |
| JPT |
Jet pipe temperature |
| JSC |
Joint stock company |
| JSOR |
Joint services operational requirement |
| JTIDS |
Joint tactical information distribution system |
| JTS |
Joint Training Squadron (USAF/USN) |