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Dictionary of Aviation 航空词典 下

时间:2011-02-23 15:20来源:蓝天飞行翻译 作者:航空 点击:


to swing a compass to calibrate com-pass deviation by recording its value on a compass base while rotating the air-craft through 360° 3. . to swing a pro-peller to turn a propeller by hand to start the engine
swirl /swl/ noun a movement with a twisting motion . Swirls of smoke came out of the engine.
swirl chamber /swl t.e.mb./
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 /sw.t./ noun a device to open or break an electric current . There is an on/off switch on the front panel. . cen-trifugal 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 /s.mb.l/ noun a printed or written sign used to represent some-thing . The work done by an electrical circuit or the power consumed is meas-ured in watts and is given the symbol P.
symbolic /s.mb.l.k/ adjective refer-
ring to symbols . A symbolic code is used for synoptic charts.
symmetric /s.metr.k/, symmetri-cal /s.metr.k(.)l/ adjective referring to something which has an exact like-ness of form on opposite sides of a cen-tral dividing line . The area covered by the forecast is divided into a series of grid or reference points at approxi-mately 300 km (kilometres) symmetrical spacing.
symptom /s.mpt.m/ noun a sign or indication of something, possibly a

227 system
problem . Buffet caused by turbulent airflow acting on the tailplane is one of the first symptoms of the approaching stall.


synchronisation /s..kr.na.
ze..(.)n/, synchronization noun
occurrence at the same time or rate .
Prior to engagement, when the aircraft is being flown manually, the autopilot system will be following the aircraft flight attitude, thus ensuring that syn-chronisation is achieved.
synchronise /s..kr.na.z/, syn-chronize verb to cause to occur or oper-ate at the same time or rate . The air-craft must be trimmed for the desired flight attitude before engaging the auto-pilot, which must be synchronised to maintain that attitude when it is engaged.
synchronous /s..kr.n.s/ adjective
referring to something operating at the
same time or rate . Synchronous motors will run at constant speed and are small and light in weight.
synoptic /s.n.pt.k/ adjective refer-
ring to something which gives a brief outline or general view of something more complex . With the addition of fronts and isobars, the synoptic chart provides a representation of the weather over a large area, at a particu-lar time.
synthetic /s.nθet.k/ adjective not
natural, artificial . Mineral-based fluids are normally coloured red, and must be used with synthetic rubber seals and hoses.

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