Designation:F1881–11AnAmericanNationalStandardStandardTestMethodforMeasuringBaseballBatPerformanceFactor1ThisstandardisissuedunderthefixeddesignationF1881;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddefinesamethodfordeterminingbatperformancebymeasuringthebat-ballcoefficientofrestitution(BBCOR),derivingthebatperformancefactor(BPF),andcalculatingbatted-ballspeed(BBS).Itisapplicabletobaseballbatsofanyconstructionormaterial.Thetestmethodprovidesaquantitativemeasureofbatdynamicperformancethatmaybeusedforcomparisonpurposes.1.2TheBBCOR,BPF,andBBSareeachcalculatedfrommeasurementstakeninthelaboratoryontestequipmentmeetingtherequirementsdefinedinthistestmethod.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregula-torylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2F1887TestMethodforMeasuringtheCoefficientofResti-tution(COR)ofBaseballsandSoftballsF1888TestMethodforCompression-DisplacementofBaseballsandSoftballsF2398TestMethodforMeasuringMomentofInertiaandCenterofPercussionofaBaseballorSoftballBat3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1balancepoint,n—distancetothecenterofmassofabatwhenmeasuredfromthedistalendofthebatknob.3.1.2bat-ballcoeffıcientofrestitution(BBCOR),n—CORofaspecificballcollidingwithabatasdefinedinthistestmethod.Seecoeffıcientofrestitution(COR).3.1.3batperformancefactor(BPF),n—ratioofBBCORtoballCORinaccordancewiththistestmethod.3.1.4centerofpercussi...
