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EDU
3 Electronic drop tube.
4 Electrodynamic tether.
5 Engineering development test.
EDU 1 Enhanced, or engine, diagnostics unit.
2 Electronic display unit.
eductor Duct-fed ejector[s] for powered VTOL lift.
Edwards California [Mojave desert] AFB, site of
AFFTC and NASA DFRC, previously called Muroc.
EE 1 Emergency equipment, or egress.
2 Electronic[s] equipment [bay or compartment].
E/E Electrical/electronic.
E E Elastic modulus in overall buckling of a panel.
EEA 1 Electronic Engineering Association (London,
UK).
2 European Environment Agency (Int.).
EEC 1 European Economic Community.
2 Engine electronic, or electronic engine, control;
U adds unit.
3 Extendable exit cone.
EECM Engine engineering and condition monitoring.
EECots Extended-environment commercial off the
shelf.
EECS 1 Electrical/electronics cooling system.
2 Expeditionary Electronic Combat Squadron
(USAF).
EED 1 Electromagnetic expulsive deicing.
2 Electro, or electrical explosive device.
EEDS Electro-expulsive deicing system.
EEE Energy-efficient engine, also E3 or E 3 .
EEF Engineering Employers Federation [UK, 800+
members, office London].
EEFAE Efficient and environmentally friendly aero
engine; P adds program [completed end-2005].
EEGS Emergency electric-generating system.
EEI 1 EFIS/EICAS interface.
2 Essential elements of information (reconnaissance).
3 Electrical-engineering instruction.
4 Electronic engine instrument[s].
EEL.3 Pioneer ester-based lubricant for gas-turbine
engines (Esso).
EELV Evolved expendable launch vehicle.
EEMAC, Eemac Electrical & Electronic Manufacturers
Association of Canada.
EEMP Enhanced electromagnetic pulse.
EEMS Electrostatic engine-monitoring system.
EEOC En-route Expeditionary Operations Center
(USAF).
EEOS European Earth-observing satellite.
EEP Experimental electronics package.
EEPGS Enhanced EPGS, typically ½-ATR boxes and
½-volume.
EEProm, EEPROM, E 2 Prom Electronically-erasable
programmable read-only memory.
EER Extended echo-ranging.
EERM Etablissement d’Etudes et de Recherches
Météorologiques (F).
EEPSG European Equipment Producers Support
Group (Int.).
EES 1 Electronically-enhanced sensing, or sensor.
2 Electrical Engineering Squadron (RAF).
EET 1 Estimated elapsed time.
2 Estimated entry time.
3 Escadron d’Expérimentation et de Transport (F).
EETC Enhanced equipment trust certificate (leasing).
effective exhaust velocity
E-Etops Initial E can mean early or EIS.
EEU Elms [electrical load-management system] electronic
unit.
EEVIP Early extended-range twin operations validation
and integration.
EEW Equipped empty weight.
EEZ Exclusive [coastal] economic zone; IG adds
industry group.
EF Evaluator Flight (RAF).
E/F Engine failure.
EFA End-fire array (radar).
EFAB Extended forward avionics bay.
Efams External fuel, armament and management
system.
EFAS, Efas 1 En-route flight advisory service.
2 Electronic-flash approach-light system.
Efato, EFATO Engine failure at [or soon after] takeoff.
EFB Electronic flight bag.
EFC 1 Expected further clearance [time].
2 Elevator feel computer.
3 Engine-failure compensation mode.
EFCC Enhanced fire-control computer; C adds configuration.
EFCS Electrical [FBW], or electronic, flight-control
system.
efctv Effective.
EFCU Electronic fuel-, or flight-, control unit.
EFD Electronic flight display.
Efdars, EFDARS Expandable flight-data acquisition
and recording system (FAA).
EFDC Early-failure detection centre.
EFDPMA Educational Foundation of DPMA (US).
EFDR Expanded flight-data recorder.
EFDS Electronic flight-data system.
EFE 1 Emitter feature extractor, an Elint tool.
2 Environmentally Friendly Engine (UK 2004–).
EFEO European Flight Engineers Organization (Int.,
merged into IFEO).
EFF 1 Explosively formed fragment.
2 Effective.
3 Enhanced forward funding.
4 Experimental Forecast Facility (AWC3).
5 Engine fuel flow; HS adds heat sink.
EFFE European Federation of Flight Engineers, later
EFEO.
effective angle of attack Angle at which aerofoil
produces a given lift coefficient in two-dimensional flow,
also called AOA for infinite aspect ratio.
effective angle of incidence See effective angle of attack.
effective aspect ratio That of aerofoil of elliptical planform
that, for same lift coefficient, has same induced-drag
coefficient as aerofoil, or combination of aerofoils, in
question.
effective atmosphere That part of planetary atmosphere
which measurably influences particular process of
motion. For an Earth satellite limit is 120 miles, 193 km
(see mechanical border, sensible atmosphere).
effective cover[age] Region within which a navaid
provides accurate and reliable guidance.
effective current Difference between impressed current
and counter-current.
effective exhaust velocity Velocity of rocket jet after
effects of friction, heat transfer, non-axially directed flow,
etc.
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