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source of the radiation Solar radiation
does not exist at night when the rotation
207 shorten
of the Earth creates a shadow zone from
the sun. Line-of-sight transmission
path means that obstacles and terrain
can create shadow zones.
shaft shaft /ʃɑft/ noun a long, generally
cylindrical bar, especially one that
rotates and transmits power engine
drive shaft propeller shaft
shaft horsepower shaft horsepower / ʃɑft
hɔspaυə/ noun the unit used for stating
the power delivered to the shaft of a
turboshaft or turboprop engine. Abbreviation
SHP
shaker shaker /ʃekə/ noun a device which
shakes or vibrates violently Large aircraft
use a stick shaker to supplement
the natural stall warning of buffet.
shallow shallow /ʃləυ/ adjective not deep
shallow angle small angle
shallow depression shallow depression / ʃləυ d|
preʃ(ə)n/ noun an area of slightly low
relative atmospheric pressure
shape shape /ʃep/ noun form The shape
of an aircraft is determined by the
requirement to provide an aerodynamic
lift force great enough to support the
weight of the aircraft and payload
whilst in flight.
sharp sharp /ʃɑp/ adjective 1. thin and
capable of cutting or piercing If a
piece of thermosetting plastic is hit hard
enough, it breaks into pieces with
straight sharp edges. 2. clear The
sharp setting means the bandwidth is
reduced to 1kHz (kilohertz) to minimise
noise or interference. 3. clear and distinct
Cumulus clouds have sharp outlines.
4. sudden and acute a sharp
increase a sudden large increase
shatter shatter /ʃtə/ verb to break into a
number of pieces when hit Clear ice is
hard to shatter and break off.
shear shear /ʃə/ verb to break by lateral
movement
shearing load shearing load /ʃərŋ ləυd/ noun
load caused by sliding apart the layers
of a structure
shear stress shear stress /ʃə stres/ noun stress
that occurs in riveted and bolted joints
when a force causes one layer of material
to slide over an adjacent layer
shed shed /ʃed/ verb to get rid of Nonessential
loads may need to be shed in
order to reduce weight.
sheet sheet /ʃit/ noun 1. a large, thin, flat
piece of material aluminium sheet 2. a
relatively large piece of paper
instruction sheet a piece of paper on
which special instructions are written or
printed
shell shell /ʃel/ noun the outer covering of
something such as an aircraft fuselage
shield shield /ʃild/ noun a protective covering
heat shield verb to protect by
covering The beacon should be sited
on the highest ground to prevent the
transmitted signal from being shielded.
shift shift /ʃft/ noun 1. movement from
one place to another a shift in position
2. a change When a radio transmission
is made from a moving platform,
there will be a shift in frequency
between the transmitted and intercepted
radio signals. verb to change the position
of something to shift a load
shock shock /ʃɒk/ noun 1. a sudden violent
impact On all undercarriages some
form of accepting the shock of landing
must be included. 2. disturbance of
mental functions caused by a terrible
experience or injury Crew should be
aware of reverse panic, a form of shock
which makes passengers unable to comprehend
the need for urgency.
shock absorber shock absorber /ʃɒk əb| zɔbə/
noun device to minimise the shock to
the main structure of the aircraft when it
lands
shock wave shock wave /ʃɒk wev/ noun compression
wave caused by supersonic
motion As sonic speed is approached,
the efficiency of the intake begins to fall,
because of the formation of shock waves
at the intake lip.
shore shore /ʃɔ/ noun a stretch of land at
the edge of the sea or a lake, etc. At a
height of 3,000 feet it was possible to
see the shore. offshore, onshore
shorten shorten /ʃɔt(ə)n/ verb to make short
or shorter in length or duration Mishandling
of aero-engines during operation
can cause considerable damage
and wear which can shorten the life of
the engine. The length of the mercury
short-haul 208
column shortens when cooled. Opposite
lengthen
short-haul short-haul /ʃɔt hɔl/ adjective travelling
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Dictionary of Aviation下(68)
