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feederliner
feederliner Transport aircraft used to operate feeder,
commuter or third-level services.
feeder route Links en-route to initial approach fix.
feed pipe Pipe supplying any liquid.
feed tank Small tank drawing fuel from main tankage
and transferring it under pressure to an engine.
feel Subjective pilot assessment of aircraft response to
flight-control commands, stability, attitudes and other
factors influencing his opinion.
feeler aileron Small manual aileron whose primary
purpose is to impart feel.
feel system Mechanism in which control feel is
augmented, improved or simulated artificially rather than
provided only by aerodynamic forces on control surfaces
(see artificial feel).
feet dry Code: “I am, or contact designated is, over
land” (DoD).
feet per second Ft/s, = 0.3048 ms –1 , 1.09728 km/h.
feet wet Code: “I am, or contact designated is, over
water” (DoD).
FEFA Future European Fighter Aircraft (project).
FEFI Flight engineers fault isolation (technique and
handbook).
FEGV Fan-exit guide vane.
FE(H) Flight Examiner [Helicopter].
FEI 1 Federation of the Electronics Industry [office
London WC1B 5EE] (UK) 300+ members.
2 Field engineering instructions (NATS).
FEIA Flight Engineers’ International Association (US,
merged into IFEO).
FEL, Fel 1 1 Free-electron laser.
2 Fibre-elastomer or elastomeric.
FELC Field-effect liquid crystal.
FELD Forward electrical load center (EP-3).
FELT, Felt Free-electron laser technology; IE adds integration
experiment (SDI).
felt Non-woven materials used when properties of unidirectional
fibre-reinforced plastics are not required; built
up from fibres or whiskers of carbon, glass, formerly
asbestos, etc.
felt strip See moleskin.
FEM 1 Force effectiveness measure.
2 Finite-element model/mesh/method.
FEMA Federal Emergency Management Agency (US).
femto Prefix: multiplied by 10 –15 , one thousandth of a
millionth of a millionth; see fermi.
fence 1 Line of readout or tracking stations for communication
with satellite.
2 Line or network of radar stations, on land or round
periphery of surface fleet, for detecting enemy aircraft or
missiles.
3 Wall-like plate mounted on upper surface of wing,
often continuing around leading edge, substantially
parallel to airstream and used to prevent spanwise flow,
esp. over swept wing at transonic speeds.
Fenda Federación Nacional de los Desportes Aéros
(Spain).
FENE Fixed exit nozzle engine.
Fenestron Helicopter tail rotor with numerous blades
rotating in short duct inset into fin.
FEO Federal Energy Office (US).
FEP Front-end processor.
fermi Unit of length, = 10 –15 m.
Ferpic Ferroelectric photoconductive image ceramic.
FFA
FEPS Flight-envelope protection system.
ferret Aircraft, ship or other platform equipped for
detection, location, recording and analysis of hostile EM
radiation (Elint mission).
Ferris scheme Carefully designed paint scheme using
two shades of colours to make it difficult to ascertain
aircraft attitude (secondarily, aircraft type and direction
of travel).
ferrite Magnetic ceramics composed of salts of iron and
another divalent metal; because of low eddy-current
losses, cores constructed of sintered powders of these
materials are widely used for rod aerials and cores of
inductors for RF and video.
ferrite paint See iron paint.
ferritic Of ferrite.
ferrous Derived from iron.
Ferroxcube Proprietary non-metallic insulating
magnetic materials which have extremely high resistivity
and low eddy-current losses but do not become permanently
magnetised.
ferrule Small metal fitting or wire wrapping used to
prevent loosening of wire terminal.
ferry flight Flight whose purpose is to reposition aircraft
at a different place.
ferry pilot One responsible for delivering aircraft from
one place to another; eg from manufacturer to customer.
ferry range Distance unladen aircraft can be ferried;
specified with or without ferry tanks.
ferry tank Extra fuel tank for ferry flight over range
greater than normal limit.
fertile material Not itself fissile by thermal neutrons, can
be converted into fissile material by irradiation; two are
U-238 and Th-232, partially converted into Pu-239 and
U-233.
FES Flexible elastomer skin.
FESC Forward electrical/electronic service centre.
Fescolizing Patented electroplating of Cd, Cr or Ni.
FESG Forecasting and Economic-Support Group.
FEST Foreign emergency support team (USAF).
FET 1 Field-effect transistor.
2 First engine to test (date).
3 Fighter engine[s] team.
FETAP Fédération Européenne des Transports Aériens
Privés.
FETT First engine to test, date of first run of first
complete engine of new type; confusingly sometimes said
to mean first engine Type-Test, which might be years
later.
FEW 1 Fighter Escort Wing.
2 Few clouds, usual = 1 to 2 oktas.
The Few Collectively, the figher pilots defending the UK
between 10 July and 31 October 1940.
few Up to 7 hostile aircraft (DoD).
FEWP Federation of European Women Pilots.
FEWSG Fleet EW Support Group.
FF Final fix.
FF, f.f. Fuel flow.
F/F First flight.
f f Frequency to which digital filter is tuned.
FFA 1 Flying Farmers Association [office, Shobdon
airfield, HR6 9LT] (UK).
2 Foam-filled aluminium.
3 Flygtekniska Föröksanstalten; aeronautical research
institute, merged 2001 into FOI (Sweden).
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