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prone to, likely to be affected by
A
rough surface is more susceptible to
fatigue cracking than a smooth one, and
for this reason highly stressed members
are often polished.
suspect 226
suspect suspect adjective /sspekt/ referring
to something believed to be causing
problems
The magnetic flaw
detection technique is to induce a magnetic
field in the suspect part and then
to brush over it an ink containing a
magnetic powder.  verb /sə|spekt/ to
believe to be the case
If fuel contamination
by water is suspected, a sample
of fuel should be drained from the tank
for inspection.
suspend suspend /sə|spend/ verb 1. to hang
freely from a point
When it is freely
suspended, a magnet will turn until one
pole is towards the Earth’s magnetic
north pole. 2. to float freely in the air or
in a liquid
The weather associated
with visibility reductions by particles
suspended in the atmosphere is classified
as fog, mist, haze or smoke.
suspension suspension /sə|spenʃən/ noun 1.
the act of state of hanging freely from a
point 2. the dispersion of particles in a
liquid or gas
If a sample of fuel taken
from a tank is hazy or cloudy in appearance,
this indicates the presence of
water in suspension.
sustain sustain /sə|sten/ verb 1. to continue,
to maintain
For sustained supersonic
flight, some measure of tank insulation
is necessary to reduce the effect of
kinetic heating. 2. to receive, experience
or suffer
The aircraft sustained
major damage in the crash.
The pilot
sustained minor injuries.
sweep sweep /swip/ verb to move across
quickly and with force
Cold arctic air
sweeps over North America in winter.
sweepback sweepback /swipbk/ noun an aircraft
wing that slopes backwards
towards the tail, forming an acute angle
with the body of the aircraft
swell swell /swel/ noun a long wave on
water that moves continuously without
breaking
When ditching an aircraft
the selection of a landing direction
which will result in the minimum relative
speed between the aircraft and sea
swell will reduce impact forces and
minimise structural damage.
sweptback sweptback /sweptbk/ adjective
referring to a wing that slopes backwards
towards the tail of the aircraft
sweptwing sweptwing /sweptwŋ/ adjective
referring to an aircraft that has sweptback
wings
swing swing /swŋ/ verb 1. to move from
side to side with some force
There is
often a tendency for a propeller driven
aircraft to swing or yaw on take-off. 2. 
to swing a compass to calibrate compass
deviation by recording its value on
a compass base while rotating the aircraft
through 360° 3.  to swing a propeller
to turn a propeller by hand to
start the engine
swirl swirl /sw%l/ noun a movement with a
twisting motion
Swirls of smoke came
out of the engine.
swirl chamber swirl chamber /sw%l tʃembə/
noun a small chamber in the cylinder
head to promote swirl
The usual
method of atomising the fuel is to pass it
through a swirl chamber, so converting
its pressure energy to kinetic energy.
switch switch /swtʃ/ noun a device to open
or break an electric current
There is an
on/off switch on the front panel.  centrifugal
switch a switch operated by
centrifugal force  verb to connect or
disconnect two lines by activating a
switch  to switch on to start to provide
power to a system by using a switch

Switch on the light.  to switch off to
disconnect the power supply to a device
or system
Switch off the navigation
lights.
symbol symbol /smbəl/ noun a printed or
written sign used to represent something

The work done by an electrical
circuit or the power consumed is measured
in watts and is given the symbol P.
symbolic symbolic /sm|bɒlk/ adjective referring
to symbols
A symbolic code is
used for synoptic charts.
symmetric symmetric /s|metrk/, symmetrical
/s|metrk(ə)l/ adjective referring
to something which has an exact likeness
of form on opposite sides of a central
dividing line
The area covered by
the forecast is divided into a series of
grid or reference points at approximately
300 km (kilometres) symmetrical
spacing.
symptom symptom /smptəm/ noun a sign or
indication of something, possibly a
227 system
problem
Buffet caused by turbulent
　
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