Designation:D5366−96(Reapproved2017)StandardTestMethodforDeterminingtheDynamicPerformanceofaWindVane1ThisstandardisissuedunderthefixeddesignationD5366;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthestartingthreshold,delaydistance,andovershootratioofawindvanefromdirectmeasurementsinawindtunnel.Thistestmethodisapplicableonlytowindvaneshavingmeasurableovershoot.1.2Thistestmethodprovidesfordeterminationoftheperformanceofasystemconsistingofawindvaneanditsassociatedposition-to-outputtransducerinwindtunnelflow.Useofvaluesdeterminedbythistestmethodtodescribeperformanceinatmosphericflowofawinddirectionmeasur-ingsystemincorporatingthevanemustbedonewithanunderstandingofthedifferencesbetweenthetwosystemsandthetwoenvironments.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1356TerminologyRelatingtoSamplingandAnalysisofAtmospheres3.Terminology3.1Fortermsthatarenotdefinedherein,refertoTerminol-ogyD1356.3.2Definitions:3.2.1delaydistance(D)—thedistancetheairflowspastawindvaneduringthetimeittakesthevanetoreturnto50%oftheinitialdisplacement.3.2.2overshoot(θn)—theamplitudeofadeflectionofawindvaneasitoscillatesab...
