ARP4737H 投票稿.docx

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,LargeCapacityAIR9968ViscosityTestofThickenedAircraftDeicingZAnti-IcingFluidsAS5635MessageBoards(DeicingFacilities)ARP5149TrainingProgramGuidelinesforDeicingZAnti-IcingofAircraftonGround3.1 Abbreviations:C=CelsiusF=FahrenheitOAT=OutsideAirTemperatureFP=Freezingpointh=Hoursmin=Minutes1.OUT=LowestOperationalUseTemperature3.1.1.1 Thelowestoperationalusetemperature(LOUT)isthehigher(warmer)of1) Thelowesttemperatureatwhichthefluidmeetstheaerodynamicacceptancetest(accordingtoAS5900)foragiventype(highspeedorlowspeed)ofaircraftofand2) Thefreezingpointofthefluidplusthefreezingpointbufferof10forTypeIfluidand7forTypeII,IIIorIVfluids.Forapplicablevaluesrefertothefluidmanufacturer'sdocumentation.6.2.2OptionalUsage:Anti-icingfluidmaybeappliedtoaircraftsurfacesatthetimeofarrival(preferablybeforeunloadingbegins)onshortturnaroundsduringfreezingprecipitation,andonovernightaircraft.Thiswillminimizeiceaccumulationpriortodepartureandoftenmakessubsequentdeicingeasier.Thispracticehasthepotentialtobuildupresidues.Anappropriateinspectionandcleaningprogramshallbeestablished.6.2.2.1Inanticipationofweatherconditionsthatrequiredeicing,anti-icingfluidmaybeappliedtocleanaircraftsurfacespriortoaircraftbeingexposedtothefreezingprecipitation.Thiswillminimizethepossibilityofsnowandicebondingorreducetheaccumulationoffrozenprecipitationonaircraftsurfacesandfacilitatesubsequentdeicing.Priortoflighttheaircraftmustbedeiced,unlesstheintegrityofthefluidcanbeensured.DeiceinaccordancewithAppendixATableI,wheneverpossible,toreducethepotentialforresiduebuildup.Note:DehydrationofTypeII,IIIandIVfluidcannegativelyimpactthefluidperformance.6.3.1.2ApplicationLimits(seeapplicabletables):Undernocircumstancesshallanaircraftthathasbeenanti-icedreceiveafurthercoatingofanti-icingfluiddirectlyontopofthecontaminatedfilm.Ifanadditionaltreatmentisrequiredbeforeflight,acompletedeicing/anti-icingshallbeperformed(seeapplicationTablesA1andA2).Ensurethatanyresiduesfromprevioustreatmentareflushedoff.Anti-icingonlyisnotpermitted.Caution:TheapplicationofTypeII,IIIandIVfluid,especiallywhenusedinaonestepprocessorinthefirststepofatwostepprocess,maycauseresiduestocollectinaerodynamicallyquietareas,cavitiesandgaps.Thismaycauseflightcontrolproblems.TheapplicationofhotwaterorheatedTypeIfluidinthefirststepofatwostepprocesswillminimizetheformationofresidues.Residuesmayrehydrateandfreezeundercertaintemperature,highhumidityand/orrainconditionsandmayblockorimpedecriticalflightcontrolsystems.IfaTypeII,IIIorIVfluidisusedinaonestepprocessorinthefirststepofatwostepprocess,thenanappropriateinspectionandcleaningprogramshallbeestablisheddependentontheoperator'sexperienceandfleettype.Wheneversuitable,deiceandanti-icewithonlyTypeI.Flightcontrolproblemsassociatedwithfrozenorunfrozenresidueshavebeenobservedtobeparticularlyprevalentwhenthickenedfluidsareusedtoremovefrostduringaperiodofdryweatherfollowedbyhydrationoftheresiduesbywaterfromrain,condensation,cleaning,orwetsnowinflight.APPENDIXATABLEA1-GuidelinesfortheApplicationofSAETypeIFluidMixturesMinimumConcentrationsasaFunctionofOutsideAirTemperature(OAT)OutsideAirTemperatureOATOne-StepProcedureSee6.3.3.1Deicing/Anti-icingTwo-StepProcedureSee6.3.3.2FirstStep:DeicingSecondStep:Anti-Icing1-3oC(27oF)andaboveHeatedmixofFluidandwaterwithafreezingpointofatleast10°C(18oF)belowactualOATHeatedwateroraheatedmixoffluidandwaterHeatedmixofFluidandwaterwithafreezingpointofatleast10oC(18oF)belowactualOATBelow-3oC(27oF)DowntoLOUTFreezingPointofheatedfluidmixtureshallnotbemorethan3oC(5oF)aboveOATNote:Temperatureofwaterorfluid/watermixturesshallbeatleast60(140oF)atthenozzle.Uppertemperaturelimitshallnotexceedfluidandaircraftmanufacturersrecommendations.Note:TouseTypeIholdovertimeguidelines,atleast1Iiterm2(-2Gals100ft2)mustbeappliedtothede-icedsurfacesNote:ThistableisapplicablefortheuseofTypeIHoldoverTimeGuidelines.Ifholdovertimesarenotrequired,atemperatureof60(140oF)atthenozzleisdesirable.Caution:WingskintemperaturesmaydifferandinsomecasesmaybelowerthanOAT.Astrongermix(moreGlycol)canbeusedundertheseconditions.1)Tobeappliedbeforethefluidappliedinthefirststepfreezes,typicallywithin3minutes.TABLEA2-GuidelinesfortheApplicationofSAETypeII,IIIandTypeIVFluidMixturesMinimumConcentrationsasaFunctionofOutsideAirTemperature(OAT)Concentrationsin%VolumeZVoIumeOutsideAirTemperatureOAT*One-StepProcedureSee6.3.3.1DeiCing/Anti-icingTwo-StepProcedureSee6.3.3.2FirstStep:DeicingSecondStep:Anti-ICing-3oC(27oF)andabove50/50HeatedTypeII,IllorIVWaterheatedto60"C(140,F)minimumatthenozzleoraheatedmixofTypeI,TypeII,TypeIIIorIVwithwater50/50TypeII,IIIorIVBelow-3oC(27oF)to-14°C(7。F)75/25HeatedTypeII,IIIor