1Dk4eXg

jock, jockey
2 Jet orientation course.
jock, jockey Combat aircraft pilot (colloq.).
JOCS, Jocs Joint operations, or operational, command
[and control] system.
joggle Small vertical offset along edge of sheet or strip
to allow it to overlap adjacent component.
joggling Local squeezing of sheet-metal parts to
improve abutment of mating surfaces.
Johanssen block Super-accurate metal block for reference
of various dimensions and surface finishes.
Johnson noise RF thermal noise.
joined wing[s] Diamond wing.
Joint Aerospace Operations Center Carried in MC2A-X
to control global task force (USAF).
Joint Aviation Authorities Regulations adopted by
Austria, Belgium, Cyprus, Czech Rep., Denmark,
Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Luxembourg, Malta, Monaco,
Netherlands, Norway, Poland, Portugal, Slovenia, Spain,
Sweden, Switzerland and UK.
jointery Willing co-operation between armed forces
(UK colloq.).
jointship Vague buzzword meaning air/land/sea [space]
is all one conflict.
Joint-Stars Joint surveillance and target-attack radar
system (USAF).
joint-use restricted area Restricted area in which, when
not in use by using agency (eg USAF), FR or VFR clearance
can be given for FAA traffic.
Joint Weather Impact System Automatic database
supporting MAAP.
joint-wing Diamond wing.
Joker Fuel planning level selected to warn of imminent
approach of Bingo.
JONA Joint Office of Noise Abatement (DoT/NASA).
JOP 1 Junior officer pilot (RAF).
2 Joint operations picture.
JOPES Joint operation[s] planning and execution
system.
JOpsC Joint Operations Command [being prepared by
Joint Forces Command 2003 for major combat and
stability operations] (US).
JORD Joint Operational Requirements Document.
JORN, Jorn Jindalee OTH radar network (Australia).
Josephson junction Formed by weakly linking superconductors
at below 4°K, offering immense possibilities
0–1,000 GHz.
JOSS Joint overseas switchboard (DoD).
Jostle Powerful RAF active jammer, 1942–45.
JOTS Joint operational tactical system.
JOTT Junior officer tactics team (USN).
joule SI unit of energy [potential, heat or kinetic], J =
Nm = Ws = 10 7 erg; MJ = 0.37251 hp-h.
Joule constant Mechanical equivalent of heat, = 4.1858
J/15°C calorie, used in definition of 15° calorie.
Joule/Kelvin effect Expansion of gas from high pressure
through throttling orifice or porous plug; also called
Joule/Thomson effect, see next.
Joule/Thomson coefficient Rate of change ( –––
dT
) H
dP
where T = temp, P = fluid pressure and H = enthalpy in
reversible flow through porous plug.
Joule/Thomson cooling Achieved by passing
compressed gas through porous plug or small aperture.
JRDF
Jovial A real-time language for embedded computers
[replaced by Ada].
joy Success, satisfaction; thus “no *” = it failed to work
(RAF).
joystick Control column (suggest archaic).
JP 1 Jamming pulse.
2 Jet propulsion/propelled/propellant.
JP-1 Original kerosene, Avtur (Jet Propulsion -1) fuel,
replaced by Jet A-1, NATO F35.
JP-2 Improved kerosene, soon obsolete.
JP-3 Original wide-cut, including gasolines, kerosene
and gas oil fractions.
JP-4 Wide-range distillate, Avtag, FS II, NATO F40,
commonly available but reduces pump life and increases
fire hazard; equivalent is Jet B fuel.
JP-5 Avcat, NATO F44, denser high-flash kerosene.
JP-6 ‘Heart-cut distillate’, close control, good thermal
stability, experimental use only.
JP-7 Special fuel for Mach 3 extreme-altitude aircraft
(SR-71).
JP-8 Narrow-cut distillate, Jet A-1, F34, Avtur FS II.
JP-9 Starter fuel for cruise missiles [start at high
altitude].
JP-10 High-density fuel developed to extend range of
cruise missiles.
J-Pads Joint precision airdrop system.
J-Pals, JPALS Joint precision approach [and] landing
system (USAF/USN, replaced ACLS).
J-Pass, JPASS Joint precision advanced strike system.
J-Pats, JPATS Joint primary-aircraft training system
(USAF/USN).
JPC J-tids portable capability (RAF).
JPDO Joint Planning and Development Office [also
often called Joint Program Development Office and Joint
Planning and Development Organization], charged with
developing Ngats (FAA, DoC, DoD, DHS, NASA,
White House).
JPF Joint programmable fuze; PO adds Program
Office.
JPI Joint precision interdiction (NATO).
JPITL Joint prioritized integrated target list.
JPL Jet Propulsion Laboratory, a major facility of
NASA, operated by Caltech [Pasadena, CA91109] (US).
JP900 Experimental jet fuel prepared from coal (Penn.
State Energy Institute, 2004).
JPO 1 Joint program(me) office or organization.
2 Joint planning and development office for the transformation
of the US aviation system (White House).
JPS Journal processing system.
JPSD Joint precision strike demonstration [PO adds
project office] (USA).
j.p.t., JPT Jet-pipe temperature.
JPTL Joint prioritized target list.
JPTS Jet propulsion, thermally stable, fuel for ultrahigh
altitude aircraft [originally for the U-2].
JR Utility transport aircraft class (USN 1935–55).
JRB Joint Reserve Base (US).
JRBA Joint Review Board Advisory Committee.
JRC 1 Joint Research Centre (Euratom Belgium/
Germany/Italy/Netherlands).
2 Joint Resources Council (FAA).
JRCC 1 Joint Rescue Co-ordinating Centre (UK).
2 Joint Requirements Oversight Council (DoD).
JRDF Joint Rapid Deployment Force (UK).
363