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1、PEC航空英語(yǔ)證書(shū)考試航空英語(yǔ)證書(shū)考試航空術(shù)語(yǔ)定義航空術(shù)語(yǔ)定義ATermDefinitionaerodyneAheavierthanaircraftderivingitsliftfrommotion.aeronautPilotcrewoflighterthangascraft.aeroplaneApowerdrivenheavierthanairaircraftthatderivessupptintheatmospherefromthe

2、reactionsoftheaironitssurfacesthatremainfixedundergivenconditionsofflight.(Alsoairplane)aerostatAlighterthanaircraftsuchasaballoonairship.Itsliftiscausedbybuoyancyrelativetosurroundingair.aileronsOnanaircrafttheaileronsa

3、reacontrolsurfaceusuallyonthetrailingedgeofthewings.Theaileronsareusedtocontrolroll.Theaileronsareontheoutsideofthewingsoperateoppositely(Ifonegoesuptheothergoesdown).aircraftAvehiclethatcantravelthroughtheair.airplaneAp

4、oweredaircraftthatderivesitsliftfromthemovementofairoverfixedliftingsurfaces.(Alsoaeroplane)airshipAlighterthanaircraftthatcanbesteeredpropelledthroughtheair.(Alsodirigible)attitudeTheientationofanaircraftwithrespecttoth

5、ehizon.autogyroArotcraftwithunpoweredbladesitrequiresaseparateenginetoprovidefwardmotionbefeliftisdeveloped.aviatPilotcrewmemberofanaircraft.availableseatmilesAvailableseatmiles(ASMs)isameasureofanairlineflightspassenger

6、carryingcapacity.Itisequaltothenumberofseatsonboardanaircraftmultipliedbythedistanceflowninmiles.Fexamplea100seataircraftflying100mileswouldresultin10000ASMs.Seatsthatarenotavailablefsaletorevenuepayingpassengers(e.g.sea

7、tsreservedfcrewrestetc.)areexcludedfromthiscalculation.TheamountofASMsflownbyanairlineduringaspecifiedperiodequalsthesumofASMsflownonallflightsduringtheperiod.aviatrixFemaleaviat(Obsoletepotentiallyoffensiveinmodernuse.)

8、availabletonmiles(ATMs)Tonsmultipliedbymilesflown.Itisaninternationalmeasureofthecapacityavailablefacarrier.Itisalsousedtomeasurecapacityavailableffreightcarriers.additionwillgiveamovementinthedesireddirection.chdThedime

9、nsionofawingparalleltothedirectionofmotion.(Comparewithspanthickness.)DTermDefinitiondihedralangleTheanglethatanaeroplaneswingsmakerelativetothelateralaxis(hizontalplanewhenonlevelground).Alargerdihedralanglegivesgreater

10、roll(lateral)stabilityatthecostofefficiency.Ifthewingsangleupwardsitiscalledthedihedralangle.Downwardangledwingsaresaidtohaveananhedralangle(increasinglyreferredtoasnegativedihedral).dirigibleAlighterthanaircraftthatcanb

11、esteeredpropelledthroughtheair.FromtheFrenchwddirigeablemeaningsteerable.(Thistermisgenerallyconsideredoutofdate.Themoderntermisairship.)dryleaseAleaseinwhichjusttheaircraftisprovidedwithnocrewmaintenanceguarantees.ETerm

12、DefinitionelevonsOnanaeroplaneelevonsareasinglecontrolsurfacewhichcombinesthefunctionoftheelevatsaileronsinone.Theyareusuallyseenondeltawingaircraft.elevatOnanaeroplanetheelevatsareacontrolsurfaceusuallyonthetrailingedge

13、ofthehizontalstabilizer.Theelevatsareusedtocontrolpitch.FTermDefinitionfeatherTorotatethepitchofthepropellerbladesuntiltheyareienteddirectlyintotheairflowprovidingtheleastairresistancenothrust.Thepropellerisusuallyfeathe

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