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on an axis or centre In the event of
flame extinction in flight, the engine
will continue to rotate, due to the air-
199 rudder
flow through it caused by the forward
speed of the aircraft. The aircraft
should be rotated to the recommended
nose-up attitude for touch down.
Counter-rotating propellers rotate in
opposite directions. rotation
rotation /rəυ|teʃ(ə)n/ noun 1. the act
of moving the control yoke or stick aft
to raise the nose of an aircraft during the
take-off run to facilitate the aircraft
becoming airborne Rotation should
begin at about 60 knots. 2. the act of
turning around an axis or centre the
rotation of the earth crankshaft rotation
The speed of rotation determines
the frequency of the generator output.
COMMENT: The aircraft rotates around
three axes: pitch = rotation around the
lateral axis; roll = rotation around the
longitudinal axis; yaw = rotation
around the vertical axis.
rotational rotational /rəυ|teʃ(ə)nəl/ adjective
rotating rotational movement of the
camshaft The rotational movement of
the propeller blades creates lift at right
angles to the blade.
rotor /rəυtə/ noun a device which
turns about an axis or centre The rotor
blade of a compressor.
rotor blade rotor blade /rəυtə bled/ noun a
long thin aerofoil on a helicopter rotor
rotorcraft /rəυtəkrɑft/ noun same
as rotary wing aircraft
rough /rf/ adjective 1. not smooth,
having an irregular surface. Opposite
smooth rough air turbulent air
rough running referring to a piston
engine which is not operating correctly
2. not fully detailed a rough estimate
an approximate calculation, good
enough for a given purpose a rough
drawing a quick drawing usually used
to illustrate or explain
roughness /rfnəs/ noun unevenness
of a surface The strength of turbulence
near the Earth’s surface
depends largely on the surface temperature,
the surface wind, and the roughness
of the surface.
rough terrain rough terrain /rf tə|ran/ noun
uneven ground
round round /raυnd/ adjective circular a
round life raft adverb in a circular
movement The pointer swings round.
route route /rut/ noun a course of travel
The purpose of charts is to plan and fly
a safe route to a destination. en route
verb to plan to send an aircraft, passengers
or freight to a place along a particular
route
route flight plan route flight plan /rut flat pln/
noun detailed information concerning
an intended flight, provided to an air
traffic control facility in written or oral
form
routine routine /ru|tin/ noun a standard procedure
Meteorological information
for scheduled flights will be passed to
the operations department as a matter
of routine. adjective standard and regular
routine servicing servicing carried
out in the normal way at regular,
scheduled intervals
row row /rəυ/ noun 1. a series of objects in
a line Each row of rotating rotor
blades is followed by a row of stationary
stator blades. 2. a series of seats in
an aircraft There are no empty seats in
Row 8.
rpm rpm, r.p.m. abbreviation revolutions
per minute Rpm is the number of revolutions
per minute that the engine
crankshaft is making. The actuator
control is sensitive to engine rpm.
R/T R/T abbreviation radiotelephony
(NOTE: R/T is frequently used in spoken
language, whereas RTF is the ICAO
abbreviation.)
RTF RTF abbreviation radiotelephony
(ICAO)
rudder rudder /rdə/ noun a control surface
on the fin which rotates the aircraft
about its vertical axis to produce yaw
The A320 retains a backup mechanical
linkage for elevator trim and rudder to
allow control in the unlikely event of
complete electrical failure.
COMMENT: The rudder does not turn
the aircraft. It is used, together with
aileron deflection, to initiate turns, to
balance forces in turns and to
counteract yawing motions created by
the propeller during flight. The rudder
pedals are mounted on the floor of the
cockpit.
rudder ball 200
rudder ball rudder ball /rdə bɔl/ noun same
as inclinometer
rudder pedal rudder pedal /rdə ped(ə)l/ noun a
foot-operated lever which moves the
rudder Just before take-off, the pilot
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Dictionary of Aviation下(61)