Dictionary of Aviation下(10)

曝光台 注意防骗 网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者

itself with the Earth’s magnetic lines of
force which run from the north magnetic
pole to the south magnetic pole.
magnetic bearing magnetic bearing /m$|netk
beərŋ/ noun the angle measured in a
clockwise direction of a distant point,
relative to magnetic north
magnetic declination magnetic declination /m$|netk
dekl|neʃ(ə)n/ noun same as magnetic
variation
To convert magnetic
bearing into true bearing it is necessary
to apply magnetic variation at the point
at which the bearing was taken.
magnetic field magnetic field /m$|netk fild/
noun area of magnetic influence
magnetic north magnetic north /m$|netk nɔθ/
noun the direction of the Earth’s magnetic
pole, to which the north-seeking
pole of a magnetic needle points if unaffected
by nearby influences
magnetic pole magnetic pole /m$|netk pəυl/
noun one of the two poles which are the
centres of the Earth’s magnetic field
magnetic variation magnetic variation /m$|netk
veər|eʃ(ə)n/ noun differences in the
Earth’s magnetic field in time and place

To convert magnetic bearing into true
bearing it is necessary to apply magnetic
variation at the point at which the
bearing was taken. Also called magnetic
declination
magnetise magnetise /m$nətaz/, magnetize
verb to convert an object or material
into a magnet
Ferro-magnetic materials
are easily magnetised.
magnetism magnetism /m$nətz(ə)m/ noun
a force exerted by a magnetic field
An
electric current produces magnetism,
143 maneuver
and movement of a magnet can produce
electricity.
magneto /m$|nitəυ/ noun a device
that produces electrical current for distribution
to the spark plugs of piston
aero-engines
COMMENT: The crankshaft turns the
magnetos, which provide the electrical
energy to create a spark from the
spark plugs. This ensures that the
spark plugs work even if the aircraft’s
battery and electrical system fail. Most
aircraft have two magnetos per engine
in case one fails.
magnify /m$nfa/ verb 1. to
increase the size of, especially by using
a lens, microscope, etc.
It was only
after the image was magnified that it
was possible to see the flaw. 2. to
increase the effect of something
The
stress level is magnified at times of high
work load, for example, preparation for
landing. (NOTE: magnifying – magnified)
magnitude magnitude /m$ntjud/ noun
greatness in size or extent
The magnitude
of the pressure gradient force is
inversely proportional to the distance
apart of the isobars.
When the surface
wind speed reaches a particular magnitude
the term gale is used.
flight maiden flight /med(ə)n flat/
noun the first flight of a new aircraft

The maiden flight of the A340 was in
October 1991.
main main /men/ adjective most important;
principal  main disadvantages principal
negative points
gear main gear /men $ə/ noun two
main landing wheel assemblies
mainplane mainplane /menplen/ noun an aircraft
wing, compared with the tailplane

The region between the mainplane
front and rear spars is commonly sealed
off and used as tanks.
maintain /men|ten/ verb 1. to keep
up, to carry on or continue  to maintain
the present heading to continue
on the same heading  to maintain a
constant selected engine speed not to
change the engine speed 2. to keep in
good mechanical or working order

Aero-engines must be maintained regularly
to maximise engine life.
maintenance /mentənəns/ noun a
regular periodic inspection, overhaul,
repair and replacement of parts of an
aircraft and/or engine
The gas turbine
is a very simple engine with few moving
parts when compared with a piston
engine, giving it a high reliability factor
with less maintenance.  maintenance
manual the manufacturer’s instruction
book of maintenance procedures
‘…poor maintenance training is
expensive for the airline who notices the
problem in late departures, longer than
necessary maintenance periods and worst
of all, crashes’ [Civil Aviation Training]
maintenance crew maintenance crew /mentənəns
kru/ noun ground staff whose responsibility
　
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