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4midable
common period 2L; when f(x) is even, only cosine terms
appear, when odd, only sine terms appear.
4midable Requirement/benefit definition study leading
to 4-D meteorological databases (Euret).
four-minute turn See standard turn.
four-poster Jet engine for VTOL with two front fan
nozzles and two rear core-jet nozzles, which in VTOL
mode provides lift from four jets in rectangular pattern;
or an aircraft equipped with such an engine.
four-way cross Airshow manoeuvre in which two pairs
of aircraft roll wings vertical to pass in a close head-on.
four-wing configuration See cruciform wing.
FOV Field of view; EA adds eye angle relative to head.
FOVE Fleet operations versatile environment [cockpit
interface].
FOW 1 Family of weapons.
2 Fibre-optic wire.
3 Fly-over waypoint.
Fowler flap Special form of split flap that moves at first
rearwards and then downwards along tracks, thus
producing initial large increase in lift and at full deflection
giving high lift and drag for landing.
Fowss Fibre-optic wing-shape sensing.
fox away Verbal code: “AAM has been fired or
released” (DoD).
Fox Code Air-combat numeral code, usually: 1, SARH
mssile selected; 2, IR missile selected; 3, guns; 4, fired
outside parameters to distract enemy. There is an alternative,
used to report method used to dispose of adversary:
1, radar, AAM; 2, IR AAM; 3, gun(s); 4, made opponent
fly into ground.
FP 1 Flight progress.
2 Fluoro-polyamide.
3 Flight path.
4 Full potential (aerodynamic flow).
5 Fixed-price.
6 Weather forecast (US states).
7 Fuel, petroleum.
8 Framework Programme [followed by a number]
(EU).
f p Freezing point.
FPA 1 Fire Protection Association (UK).
2 Flight-path angle.
3 Flying Physicians’ Association [office, Lake Bluff, IL,
US].
4 Flight-path accelerometer.
5 Focal-plane array.
6 Forward pitch amplifier (SAAHS).
7 Flat-plate antenna.
FPAC Flight-path acceleration.
FP area Food-preparation area.
FPAS 1 Focal-plane array seeker.
2 Flight-profile advisory system.
FPASS Force-protection airborne surveillance system.
FPB 1 Fuel preburner.
2 Functional payload block.
FPC 1 Flight-path control, or controller, or command.
2 Flight-profile comparator.
FPCC Flight propulsion control coupling.
FPCD Flat-panel colour display.
FPCS Flight-path control system, or (F-15 S/MTD) set.
FPC2 Force protection command and control.
FPD 1 Flight-planning document.
2 Flat-panel display.
3 Fee per departure.
4 Freezing-point depressant.
5 Flight-proximity demonstration.
6 Force Protection Directorate [2005–] (RAF).
FPDA Five-Power[s] Defence Agreement, or
Arrangements [which see].
FPDS Feasibility pre-definition study.
FPDZ Free-fall parachute drop zone; A adds activity
(CAA, UK).
FPE Fédération des Pilotes Européennes (federation of
European women pilots).
FPEEPM Floor proximity emergency-escape-path
marking.
FPEPA Fixed-price with economic price adjustment
[i.e., not fixed].
FPF Fixed-price firm.
FPG Force per g.
FPGA Field-programmable gate array.
FPI 1 Fluoropolyimide.
2 Fixed-price incentive.
3 Fluorescent penetrant inspection.
FPIF Fixed-price incentive firm.
FPIS 1 Fixed-price incentive contract with successive
targets.
2 Forward propagation by ionospheric scatter.
FPIWA First-pass in-weather attack.
FPL 1 Flight-plan message, ie filed flight plan.
2 Full performance level (FAA 1 air-traffic controllers).
3 Fluctuating pressure (rarely, power) level(s).
4 See f-pole line).
5 Full programme launch.
FPLN Flight plan.
FPLR Full programme launch review.
FPM 1 Flightpath miles.
2 Feet per minute (ft/min preferred).
3 Fleet performance monitoring [or monitor].
4 Flight-performance module (AFMSS).
5 Fibre/fiber placement mandrel.
6 Flight-plan message.
FPMU Fuel-pump monitoring unit.
FPN Fixed-pattern noise.
FPNM Feet [altitude] per nautical mile.
FPO Force Protection Organization [2005–] (RAF).
FPOV Fuel preburner oxidiser valve.
FPP 1 Fixed-pitch propeller.
2 Ferry Pilots’ Pool.
FPPS Flight-plan processing system.
FPR 1 Fan pressure ratio.
2 Fixed price, redeterminable.
3 Federal Procurement Regulation (US).
4 Flight-plan route.
5 Flat-plate radiometer.
6 Final proposal revision[s].
FPRA FPR (2) of A-type.
FPRM 1 Flight phase related mode.
2 Fuel-pipe repair manual.
FPS, fps 1 Foot-pound-second system.
2 Feet per second.
3 Fine-pitch stop.
4 Fuel production and storage [O adds offshore].
5 Flight-progress strip.
6 Fast packet switch.
FPSA Focal-plane staring array.
FPSA
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