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pressure, speed
reduction gear reduction gear /r|dkʃən $ə/
noun gears in an engine which allow the
propeller to turn at a slower speed than
the engine
redundancy redundancy /r|dndənsi/ noun the
duplication of component parts of a system
to enable the system to function
even if one component fails
With system
redundancy, a single failure within
a system will have little effect on the aircraft’s
performance during the
approach and landing operation.
redundant redundant /r|dndənt/ adjective
referring to a system which provides
extra component parts to enable the system
to function even if one component
fails
Redundant structure design is
composed of a large number of members,
all of which share a load, so that if
one of the members is lost, the load carried
by the member is divided between
all the others in such a way that the
total load-carrying ability is reduced
only slightly.
redux redux /redks/ noun a method of fixing
components together using adhesives
and glues
re-enter re-enter /ri entə/ verb to enter
again
For engine checks the aircraft
should be headed into wind to prevent
hot exhaust gases re-entering the
engine.
refer refer /r|f%/ verb 1. to describe or give
a name to
The term wind is used to
refer to the horizontal motion of air. 2.
to direct someone to a source of help or
information (NOTE: referring –
referred)  refer to chapter 10 for
more details look at or read chapter 10
for more information
reference 190
reference reference /ref(ə)rəns/ noun something
used as a basis for further calculation
or investigation  visual reference
anything seen and used as a guide to
something else
Use the large building
as a visual reference for the turn onto
final approach.  reference book a
book in which you can look for information,
e.g. a dictionary  by reference
to by looking at and comparing
reference datum reference datum /ref(ə)rəns
detəm/ noun a line fixed by the
designer from which measurements are
made when checking or adjusting wing
angles, etc.
reference point reference point /ref(ə)rəns pɔnt/
noun a fixed datum near the centre of
the airfield landing area
reference signal reference signal /ref(ə)rəns
s$n(ə)l/ noun a signal against which
telemetry data signals are compared
refinement refinement /r|fanmənt/ noun an
improvement
An internal locking
device is one of the numerous refinements
to the simple actuator.
reflect reflect /r|flekt/ verb to throw back
something such as radio waves or light

Snow surfaces reflect up to 90% of
radiation while rock, sand and concrete
reflect only 10–20%.
reflection reflection /r|flekʃən/ noun the process
of throwing back of something such
as radio waves or light
Glare caused
by reflection of sunlight from the top of
a layer of fog or haze can seriously
reduce the air-to-ground visibility.
reflective reflective /r|flektv/ adjective able
to throw back something such as radio
waves or light
Reflective power means
that at low angles of elevation of the
sun, water reflects a great amount of
solar radiation thus slowing down the
rise in sea surface temperatures.
reflector reflector /r|flektə/ noun a device
which throws back something such as
light
The shape of a water droplet
makes it a good reflector, so water in the
atmosphere absorbs and scatters radio
waves.
refract refract /r|frkt/ verb to cause a
wave, such as light or sound, to change
direction or turn as it passes from one
medium into another of different density

A sky wave starts life as a direct
wave and, on reaching the ionosphere,
the direct wave is refracted and returns
to the Earth’s surface.
refraction refraction /r|frkʃən/ noun the
change in direction or turning of a
wave, such as light or sound, as it passes
from one medium into another of different
density
refrigerant refrigerant /r|frd"ərənt/ noun a
substance to provide cooling either as
the working substance of a refrigerator
or by direct absorption of heat
Heated
air from the main air supply system
passes through the evaporator matrix
and by induction releases heat into the
　
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本文鏈接地址：Dictionary of Aviation下(52)