Dictionary of Aviation 航空詞典下

時(shí)間：2011-02-23 15:20來(lái)源：藍(lán)天飛行翻譯 作者：航空 點(diǎn)擊：次

tune /tjun/ verb 1. to set a system at its optimum point by careful adjustment
. The engine has not been properly
tuned. 2. to adjust to the particular fre-quency of the required signal . The RBI shows the bearing of the tuned radio beacon with reference to the aircraft’s heading.
tuner /tjun./ noun a part which allows the operator to select the partic-ular frequency of the required signal .
The tuner reduces interference.
turbine /tba.n/ noun a rotary motor or engine formed of a wheel driven by a flow of air or gas
turbo-/tb.υ/ prefix turbine turbocharger /tb.υt.ɑd./
noun a supercharger driven by a turbine powered by exhaust gases . The turbo-charger significantly increases engine power.
turbofan /tb.υfn/ noun a jet engine in which most of the thrust is produced by air, accelerated by a large fan, which does not pass through the combustion chamber of the engine .
The Airbus A340 is powered by four CFM56 turbofans. (NOTE: The US term is fanjet.)
COMMENT: Turbofan engines are much quieter than older turbojets and make a characteristic sound when in operation. The fan can be clearly seen in the front part of the engine. Modern airliners use turbofan engines produced by major manufacturers such as Rolls Royce, CFM or Pratt and Whitney.

turbojet /tb.υdet/ noun a jet engine which includes a turbine-driven compressor for the air taken into the engine . The de Havilland Comet was the world’s first turbojet commercial transport aircraft.
COMMENT: In recent years turbofan engines have taken over from turbojet engines. Frank Whittle (1907–96) was an English engineer and RAF officer who invented the turbojet aircraft engine. Whittle developed a jet aircraft by 1941 and the first military jet aircraft, the Gloster Meteor, became operational in 1944.

turboprop /tb.υpr.p/, turbopro-peller /tb.υpr.pel./ noun a turbo-jet engine in which the turbine also drives a propeller . The turboprop

239 tyre
engine is often used in transport air-craft.
COMMENT: Turboprop aircraft are efficient at lower speeds than turbojet aircraft and are often used for short-haul operations.
turboshaft /tb.υ.ɑft/ noun an
engine similar to a turboprop engine, except that it is used primarily in heli-copters
turbulence /tbjυl.ns/ noun an
irregular motion of the atmosphere
turbulent /tbjυl.nt/ adjective
referring to the irregular motion of the atmosphere . When flying in turbulent air conditions, an aircraft is subjected to upward and downward gust loads.
turn /tn/ noun 1. an angular change in track . a 180° turn . The autopilot may be engaged during a climb or descent but not usually in a turn. 2. a section of a wire which is wound 360° around a centre . The voltage in each winding is directly proportional to the number of turns in each winding. . verb
1. to make an angular change in track . turn right . Turn to the west. 2. to rotate

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