ARP4737H 投票稿.docx

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1、2.1SAEPublications:AvailablefromSAE,400CommonwealthDrive,Warrendale,PA15096-0001.AMS1424Deicing/Anti-icing,Aircraft,Fluid,SAETypeIAMS1428Deicing/Anti-icing,Fluid,Aircraft,Non-Newtonian,Pseudoplastic,SAETypeII,川，IVARP1971AircraftDeicingVehicle-Self-Propelled,LargeCapacityAIR9968ViscosityTestofThicken

2、edAircraftDeicingZAnti-IcingFluidsAS5635MessageBoards(DeicingFacilities)ARP5149TrainingProgramGuidelinesforDeicingZAnti-IcingofAircraftonGround3.1 Abbreviations:C=CelsiusF=FahrenheitOAT=OutsideAirTemperatureFP=Freezingpointh=Hoursmin=Minutes1.OUT=LowestOperationalUseTemperature3.1.1.1 Thelowestopera

3、tionalusetemperature(LOUT)isthehigher(warmer)of1) Thelowesttemperatureatwhichthefluidmeetstheaerodynamicacceptancetest(accordingtoAS5900)foragiventype(highspeedorlowspeed)ofaircraftofand2) Thefreezingpointofthefluidplusthefreezingpointbufferof10forTypeIfluidand7forTypeII,IIIorIVfluids.Forapplicablev

4、aluesrefertothefluidmanufacturersdocumentation.6.2.2OptionalUsage:Anti-icingfluidmaybeappliedtoaircraftsurfacesatthetimeofarrival(preferablybeforeunloadingbegins)onshortturnaroundsduringfreezingprecipitation,andonovernightaircraft.Thiswillminimizeiceaccumulationpriortodepartureandoftenmakessubsequen

5、tdeicingeasier.Thispracticehasthepotentialtobuildupresidues.Anappropriateinspectionandcleaningprogramshallbeestablished.6.2.2.1Inanticipationofweatherconditionsthatrequiredeicing,anti-icingfluidmaybeappliedtocleanaircraftsurfacespriortoaircraftbeingexposedtothefreezingprecipitation.Thiswillminimizet

6、hepossibilityofsnowandicebondingorreducetheaccumulationoffrozenprecipitationonaircraftsurfacesandfacilitatesubsequentdeicing.Priortoflighttheaircraftmustbedeiced,unlesstheintegrityofthefluidcanbeensured.DeiceinaccordancewithAppendixATableI,wheneverpossible,toreducethepotentialforresiduebuildup.Note:

7、DehydrationofTypeII,IIIandIVfluidcannegativelyimpactthefluidperformance.6.3.1.2ApplicationLimits(seeapplicabletables):Undernocircumstancesshallanaircraftthathasbeenanti-icedreceiveafurthercoatingofanti-icingfluiddirectlyontopofthecontaminatedfilm.Ifanadditionaltreatmentisrequiredbeforeflight,acomple

8、tedeicing/anti-icingshallbeperformed(seeapplicationTablesA1andA2).Ensurethatanyresiduesfromprevioustreatmentareflushedoff.Anti-icingonlyisnotpermitted.Caution:TheapplicationofTypeII,IIIandIVfluid,especiallywhenusedinaonestepprocessorinthefirststepofatwostepprocess,maycauseresiduestocollectinaerodyna

9、micallyquietareas,cavitiesandgaps.Thismaycauseflightcontrolproblems.TheapplicationofhotwaterorheatedTypeIfluidinthefirststepofatwostepprocesswillminimizetheformationofresidues.Residuesmayrehydrateandfreezeundercertaintemperature,highhumidityand/orrainconditionsandmayblockorimpedecriticalflightcontro

10、lsystems.IfaTypeII,IIIorIVfluidisusedinaonestepprocessorinthefirststepofatwostepprocess,thenanappropriateinspectionandcleaningprogramshallbeestablisheddependentontheoperatorsexperienceandfleettype.Wheneversuitable,deiceandanti-icewithonlyTypeI.Flightcontrolproblemsassociatedwithfrozenorunfrozenresid

11、ueshavebeenobservedtobeparticularlyprevalentwhenthickenedfluidsareusedtoremovefrostduringaperiodofdryweatherfollowedbyhydrationoftheresiduesbywaterfromrain,condensation,cleaning,orwetsnowinflight.APPENDIXATABLEA1-GuidelinesfortheApplicationofSAETypeIFluidMixturesMinimumConcentrationsasaFunctionofOut

12、sideAirTemperature(OAT)OutsideAirTemperatureOATOne-StepProcedureSee6.3.3.1Deicing/Anti-icingTwo-StepProcedureSee6.3.3.2FirstStep:DeicingSecondStep:Anti-Icing1-3oC(27oF)andaboveHeatedmixofFluidandwaterwithafreezingpointofatleast10C(18oF)belowactualOATHeatedwateroraheatedmixoffluidandwaterHeatedmixofF

13、luidandwaterwithafreezingpointofatleast10oC(18oF)belowactualOATBelow-3oC(27oF)DowntoLOUTFreezingPointofheatedfluidmixtureshallnotbemorethan3oC(5oF)aboveOATNote:Temperatureofwaterorfluid/watermixturesshallbeatleast60(140oF)atthenozzle.Uppertemperaturelimitshallnotexceedfluidandaircraftmanufacturersre

14、commendations.Note:TouseTypeIholdovertimeguidelines,atleast1Iiterm2(-2Gals100ft2)mustbeappliedtothede-icedsurfacesNote:ThistableisapplicablefortheuseofTypeIHoldoverTimeGuidelines.Ifholdovertimesarenotrequired,atemperatureof60(140oF)atthenozzleisdesirable.Caution:Wingskintemperaturesmaydifferandinsom

15、ecasesmaybelowerthanOAT.Astrongermix(moreGlycol)canbeusedundertheseconditions.1)Tobeappliedbeforethefluidappliedinthefirststepfreezes,typicallywithin3minutes.TABLEA2-GuidelinesfortheApplicationofSAETypeII,IIIandTypeIVFluidMixturesMinimumConcentrationsasaFunctionofOutsideAirTemperature(OAT)Concentrat

16、ionsin%VolumeZVoIumeOutsideAirTemperatureOAT*One-StepProcedureSee6.3.3.1DeiCing/Anti-icingTwo-StepProcedureSee6.3.3.2FirstStep:DeicingSecondStep:Anti-ICing-3oC(27oF)andabove50/50HeatedTypeII,IllorIVWaterheatedto60C(140,F)minimumatthenozzleoraheatedmixofTypeI,TypeII,TypeIIIorIVwithwater50/50TypeII,IIIorIVBelow-3oC(27oF)to-14C(7。F)75/25HeatedTypeII,IIIor