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EGTP
EGTP External ground test program.
EGW Ethylene glycol and water.
EH Edge enhancement.
E h Total energy at given speed and height.
EHA 1 European Helicopter Association [15 countries;
office NL-1071 Amstersdam] (Int.).
2 Electro-hydrostatic, or -hydraulic, actuator, or
actuation.
EHAC En-route high-altitude chart.
Ehanods Extended high-accuracy network orbitaldetermination
system (USAF).
EHAS Electro-hydrostatic actuation system.
EHBS Enhanced high-band subsystem.
EHD Electro-hydrodynamic.
EHDD Electronic head-down display.
e.h.f., EHF Extra-, or extremely, high frequency, see
Appendix 2.
EHL Environmental health laboratory (USAF).
EHM Engine health monitoring (or monitor).
EHOC European Helicopter Operators’ Committee
(Int.).
ehp, e.h.p. Equivalent horsepower. Usually total equivalent
shaft horsepower.
EHR Engine history recorder.
EHS 1 Enhanced surveillance.
2 Electrochemical hydrogen separation.
EHSI Electronic horizontal-situation indicator.
EHT Electrothermal hydrazine thruster.
eht Extra high tension (volts).
EHUM Engine health and usage monitor.
EHV Electro-hydraulic valve.
EHVF European Homebuilt and Vintage Federation
[2005] (Int.).
EI 1 Earth (atmosphere) interface.
2 Entry interface.
3 Emissions index.
4 Electronic intelligence, prefix to SEAD.
EIA 1 Electronic Industries Alliance [originally
Association; office Arlington, VA22201] (US).
2 Environmental impact assessment.
3 Element imaging array.
4 Enhanced imagery analysis [W adds workstation].
EIAC Electronic Industries Association of Canada.
EIANS Eurocontrol Institute of Air Navigation
Services.
EIB European Investment Bank.
EICAS, Eicas Engine indication, or instrument, (and)
crew-alert[ing]-system; C adds control.
EICMS Engine in-flight condition-monitoring system.
EID 1 Electro-impulse deicing.
2 Emitter identification.
EIDS Engine-instrument, or instrumentation, display
system.
Eiffel-type tunnel Open-jet, non-return-flow wind
tunnel in which whole working section is open.
eigen values Discrete values of undetermined parameter
involved in coefficient of differential equation, such that
solution, with associated boundary conditions, exists only
for these values; also called characteristic values or principal
values.
eight Flight manoeuvre in which aircraft flying
horizontally follows track like large figure eight (see
Cuban*, lazy *).
ejector exhaust
eight-ball Artificial horizon or attitude indicator
(colloq., US).
18-m class One of four Ostiv/FAI classes for competitive
gliding, including span not greater than 18m.
eight-point roll Roll executed in eight stages, with
aircraft held momentarily after each roll increment of 45°.
eight pylon Manoeuvre used in air racing in which
aircraft is flown around pylons so that wingtip appears to
pivot on pylon.
802-M, -11B Leading wireless cabin system [in 2002] for
use by individual passengers.
EIMG Engine Industry Management Group [12
companies] (Europe).
EIMS European innovation monitoring system.
EIOTEC Engineering, integration, operational test and
evaluation contract.
EIP 1 Enhanced industry participation.
2 Environmental-impact parameter.
3 École d’Initiation Pilotage (F).
EIPI Extended initial protocol identifier.
EIPS Engine ice protection system.
EIQ Engine Integration Qualification (USA).
EIRA Ente Italiano Rilievi Aerofotogrammetrici.
EIRP 1 Effective [or equivalent] isotropically radiated
power.
2 Earth incident radiated power.
EIS 1 Entry into service.
2 Environmental impact statement.
3 Ejection initiation subsystem.
4 Electronic instrument(ation) system.
5 Engine indication, or information, or instrument,
system.
6 Engine in service (Pratt & Whitney).
EISA Extended industry-standard architecture.
EISF Engine initial spares factor.
EISS Enhanced information sensor system, or suite.
EISW Equivalent isolated single-wheel load (LCN).
EIT Exoatmospheric interceptor technology.
EITB Engineering-Industry Training Board.
EIU Interface unit prefixed by equipment, engine, electronic[s],
Efis, Eicas or emergency.
EJAA European Joint Aviation Authorities [pre-2003
predecessor of EASA] (Int.).
ejectable Able to be ejected from aircraft, esp. capsule,
crew seat, sonobuoy, dropsonde or flight recorder.
ejection Escape from aircraft by ejection seat.
ejection angle Angle at which ejection seat leaves,
measured relative to aircraft.
ejection capsule 1 Detachable compartment serving as
cockpit or cabin, which may be ejected as unit and parachuted
to ground.
2 Box containing recording instruments or data ejected
and recovered by parachute or other device.
ejection chute Parachute(s) used to decelerate ejection
seat or capsule; often ballute or drogue.
ejection seat Seat capable of being ejected in emergency
to carry occupant clear of aircraft.
ejector Device comprising nozzle, mixing tube and
diffuser, utilising kinetic energy of fluid stream to pump
another fluid from low-pressure region.
ejector augmented lift Ejector lift.
ejector exhaust Piston engine pipe(s) disposed or shaped
to produce forward thrust, not necessarily incorporating
an ejector.
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