Dictionary of Aviation上(81)

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equilibrium equilibrium /ikw|lbriəm/ noun a
state of physical balance
When an aircraft
is in unaccelerated straight and
level flight at a constant speed, the
forces of lift, thrust, weight and drag
are in equilibrium.
equipment equipment /|kwpmənt/ noun
devices, systems, machines, etc., that
are needed for a particular purpose
(NOTE: Equipment has no plural form;
for one item say: a piece of equipment.)
 electrical equipment devices, components,
systems, etc., which use electricity
equivalent equivalent /|kwvələnt/ adjective
having the same purpose or value as
something else
The function of a logic
gate is equivalent to that of a switch.

A metal part could be as much as 25
times heavier than an equivalent plastic
part.
equivalent shaft horsepower equivalent shaft horsepower /|
kwvələnt ʃɑft hɔspaυə/ noun the
unit used for stating the total power of a
turboprop engine, consisting of the
shaft horsepower of the engine plus
the thrust from the engine. Abbreviation
ESHP
error 86
error error /erə/ noun 1. a mistake or incorrect
calculation
an error in somebody’s
work
errors caused by location
2. the known inaccuracy of an instrument
or system which has to be corrected
by calculating the true value
escape escape /|skep/ noun the act of getting
away from or out of a place after
being held  escape of fuel or oil
unwanted loss of fuel or oil  escape
from danger getting to a safe place 
verb to get away from or out of after
being held
If there is a hole in the
fuselage of a pressurised aircraft, air
escapes from the cabin to the atmosphere.
escape hatch escape hatch /|skep htʃ/ noun a
small doorway only used in emergencies
escape route escape route /|skep rut/ noun the
passengers’ way out of an aircraft after
an emergency landing
escape slide escape slide /|skep slad/ noun a
device which allows passengers to exit
the aircraft safely in an emergency,
when no steps are available
ESHP ESHP abbreviation equivalent shaft
horsepower
essential essential /|senʃəl/ adjective absolutely
necessary
Teamwork within the
crew is essential.
A knowledge of the
tropopause is essential.  non-essential
not necessary
EST EST abbreviation 1. Eastern Standard
Time 2. estimate (ICAO) 3. estimated
(ICAO)
establish establish /|stblʃ/ verb 1. to be
confirmed as stable in a particular flight
condition, such as a flight level or
glideslope, etc.
Once established on
the downwind leg, the pilot should perform
the checks. 2. to work out or to calculate
 establish your position find
out where you are 3. to position
Lowpower
NDBs (Non-Directional Radio
Beacons) are often established at the
outer or middle marker sites. 4.  to
establish communication to make
contact with  to establish control to
get control
estimate estimate /estmet/ verb 1. to calculate
approximately the cost, value or
size of something
I estimate that it
will take about two hours for us to reach
our destination.
Cloud heights may be
measured or estimated. 2. to form a
judgement about  to estimate the
chances of something to weigh the
possibilities and form an opinion
estimated take-off time estimated take-off time
/estmetd tek ɒf tam/ noun the
time when an aircraft is expected to take
off. Abbreviation ETOT
estimated time of arrival estimated time of arrival
/estmetd tam əv ə|rav(ə)l/ noun
the time when an aircraft is expected to
arrive. Abbreviation ETA
estimated time of departure estimated time of departure
/estmətd tam əv d|pɑtʃə/ noun
the time when an aircraft is expected to
take off. Abbreviation ETD
estimation estimation /est|meʃ(ə)n/ noun 1.
an approximate calculation
an estimation
of ground speed
Estimation of
visibility is achieved by noting the distances
at which lights of known candle
power can be observed and relating
these distances to visibility-by-day values.
2. an opinion  in my estimation in
my opinion
ETA ETA abbreviation estimated time of
arrival
　
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