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formed when cold air moves over relatively
warm water
Visibility was
impaired because of steam fog.
steel steel /stil/ noun a metal alloy of iron,
carbon and other compounds  stainless
steel steel containing chromium
and nickel that is highly resistant to corrosion

Tubing in parts of the system
containing fluid at high pressure are
usually made from stainless steel.
steep steep /stip/ adjective 1. sloping
sharply  a steep angle of approach
the angle formed by the aircraft
approach flight path and the horizontal
is greater than usual 2. closely spaced 3.
referring to marked changes in pressure
or temperature in a relatively short horizontal
distance
Cooling of the air in
contact with the ground at night can
cause a very steep inversion of temperature
at the surface.
Pressure gradients
in anti-cyclonic curvature tend not
to be steep.
steer steer /stə/ verb to direct by using a
wheel or control stick
The aircraft is
steered on the ground by using the rudder
pedals.
steering steering /stərŋ/ noun 1. guiding or
directing
Steering is controlled by
rudder pedals. 2. a system for guiding
or directing a car, aircraft, etc.
Most
modern light aircraft have nose-wheel
steering but older tail-draggers are
steered on the ground by using differential
braking.
step step /step/ noun 1. a stage
The first
step in map reading is to orientate the
chart. 2. one stair
Mind the step!
steward steward /stjuəd/ noun a male member
of airline staff who look after passengers
during the flight.
cabin crew,
flight attendant, stewardess (NOTE:
Different airlines use different terminology
for their staff.)
stewardess 220
stewardess stewardess /stjuə|des/ noun a
female member of airline staff who look
after passengers during the flight.

cabin crew, flight attendant, steward
(NOTE: Different airlines use different
terminology for their staff.)
stick stick /stk/ noun the main hand control
used by the pilot to control the aircraft
roll and pitch
Using fly-by-wire
technology, the stalling angle cannot be
exceeded regardless of stick input. 
verb to become fixed, as if with glue

Ice crystals and snowflakes do not stick
to airframes, and so icing is a problem
only when super-cooled water droplets
are present.
stiff stiff /stf/ adjective 1. rigid or inflexible

Kevlar 49 is stiffer than glass, but
only about half as stiff as carbon fibres.
2. not easily bent or turned  control
surfaces may become stiff as a result
of icing control surfaces may become
difficult to move 3.  a stiff wind a
fairly strong wind
stiffen stiffen /stf(ə)n/ verb 1. to make rigid
or inflexible, to make stiff
Beams can
be additionally stiffened in a downward
direction by vertical and diagonal
members. 2. to become stronger
STOL STOL /stɒl/ noun 1. a flying system
that allows an aircraft to take off and
land on a very short runway 2. an aircraft
fitted with the STOL system. Full
form short takeoff and landing
stop stop /stɒp/ noun 1. the end of a movement
 to come to a stop to stop moving
2. a component which limits the distance
that a moving part can move
An
adjustable stop on the throttle control
ensures a positive idling speed.
storage storage /stɔrd"/ noun the act of
storing something
A reservoir provides
storage space for the system fluid.
store store /stɔ/ noun 1. a supply
The
maintenance section keeps a store of
spare components. 2. US a shop  verb
to put away for future use
A capacitor
is a device with the ability to temporarily
store an electric charge.
stores stores /stɔz/ plural noun goods

Freight carrying aircraft have supporting
members of greater strength to
allow for the carriage of heavy stores.
storm storm /stɔm/ noun a violent weather
disturbance with high winds and rain or
snow
Storms produced by daytime
heating are most frequently encountered
in the afternoon and early
evening.
stow stow /stəυ/ verb to place something in
its correct position in the aircraft

Make sure the fire-extinguisher is
stowed.
stowage stowage /stəυd"/ noun a space for
stowing things
A multi-wheel combination
has the advantage of smaller and
lighter undercarriage structures, and
wing stowage problems can be overcome
　
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