1Dk4eXg

EPCA
2 Equipment Policy Committee (UK MoD).
3 Elementary Pilot Certificate.
4 Electronic power conditioner.
EPCA Energy Policy and Conservation Act (US).
EPCO EANPG Co-ordination meeting[s] (ICAO).
EPD 1 Exhaust-plume dilution.
2 Electronic product definition.
3 Electric-power distribution; A adds assembly, S
system.
EPDS See above.
Epera Extractor-parachute emergency-release assembly.
EPFA The European Property Flying Association
[registered Monmouth, Wales, promotes aircraft in the
construction industry].
EPG European participating governments (or groups).
EPGS Electric[al] power generation, or generating,
system.
ephemeris Periodical publication tabulating future
positions of satellites or daily positions of celestial bodies
and other astronomical data (plural = ephemerides).
ephemeris time Uniform time defined by laws of
dynamics, determined in principle by observed orbital
motions of Earth and other planets (see universal time).
EPI 1 Engine performance indicator.
2 Engineering process improvement.
3 Electronic-protection initiatives (AFRL).
4 Elevator position indicator.
EPIA European Photovoltaic Industry Association
(Int.).
EPIC, Epic 1 Epitaxial passivated integrated circuit.
2 Engineering and product information control
(management team).
3 Emergency procedures information centre (BAA).
4 Electronic Privacy Information Center (DC-based
watchdog).
5 Electronic and photonic integrated circuit (Darpa).
epicos Global e-business platform for aerospace and
defence industries (Int.).
EPIRB, Epirb Emergency position-indicating radio
beacon, operating on 121.5 and 406 MHz in link with
Sarsat.
EPL Engine power lever, ie throttle.
EPLD Electrically programmable logic device.
EPLRS Enhanced position-location reporting system.
EPM Electronic protection, or protective, measures.
EPMaRV Earth-penetrating manoeuvring re-entry
vehicle; does not penetrate planet, only its atmosphere
(USAF).
EPMS 1 Engine performance monitoring system.
2 Electrical power management system.
EPN European participating nations.
EPNdB Equivalent Perceived Noise Decibel; unit of
EPNL (see noise).
Epner Ecole du Personnel Navigant Centre d’Essais et
de Réception (F).
EPNL Equivalent perceived noise level; measure of
effect of noise on average human beings which takes into
account sound pressure level (intensity), frequency, tonal
value and duration.
EPNR Electrically powered noise reduction.
EPO Earth parking orbit.
epoch Time when a satellite is established in orbit.
epoxy resin Complex organic adhesive and electrical
equations of motion
insulating material; addition of hardeners, plasticiers and
fillers tailors its properties.
EPP 1 Emergency power package.
2 Enhanced parallel port.
EPPIC, Epic Enhanced precise positioning integrated
capability (satellite).
Eppler Family of wing sections for competition
sailplanes; tailored to small R, high IAS for penetration.
EPR 1 Engine pressure ratio.
2 External power receptacle.
3 Ethylene/propylene/rubber.
EPRL Engine pressure ratio limit.
Eprom Erasable, or electrically, programmable readonly
message, or memory.
EPRT Engine pressure-ratio transmitter.
EPS 1 Emergency, or [confusing] electrical, power
system, or supply or source.
2 Enhanced propulsion, or polar, system.
3 Earning[s] per share.
EPSA Emirates Parachute Sport Association [office,
Dubai] (UAE).
EPSG Equipment product supply group.
Epsilam Copper-coated flexible substrate of ceramicfilled
Teflon.
EPSRC Engineering and Physical Sciences Research
Council [1994-; office, Swindon SN2 1ET] (UK).
EPSU European Public Service Union (Int.).
EPT Egress procedures trainer, initially for the F-22 but
with wide future possibilites.
EPTA European Pultrusion Trade Association.
EPU 1 Emergency power unit.
2 Electronic processing unit.
EPUU EPLRS user unit [MLS can be suffix].
EPV 1 Estimated programme value.
2 École du Personnel Volant (F).
EPW Earth-penetrating warhead.
EPX Environmental processor, military extension.
EQAR Extended-storage [or expanded] quick-access
recorder.
EQD Electrical Quality-assurance Directorate (UK
MoD).
EQPT Equipment.
equal deflections Principle used in analysis of statically
indeterminate structure: two members rigidly attached
must deflect an equal amount at point(s) of attachment
under load.
equaliser 1 Filter network which compensates overspecified
frequency band for distortion introduced by
variation of attenuation with frequency.
2 Connection between generators in parallel to equalise
current and voltage.
equalising pulses Signals sent before and after vertical
synchronizing pulses to obtain correct start of lines in
iconoscope, vidicon and display tubes.
equal taper The same on LE and TE.
equation of time Before 1965, difference between mean
time and apparent time, usually labelled + or – to obtain
apparent time. After 1965, correction applied to 12 hours
+ local mean time (LMT) to obtain local hour angle
(LHA) of Sun.
equations of motion Give information regarding motion
of a body or point as a function of time when initial
position and velocity are known.
236