1、I1IIIIII1II,.I FORAERONAUTICSTECHNICALNOTENo. 1711APPROXIMATERELATIONSFORHINGE-MOMENTPARAMETERSOFCONTROLSURFACESONSWEPTWINGSAT LOWMACHNUMBERSByThomasA. Toll andLeslie E. SchneiterLangleyAeronauticalLaboratoryLangleyField,Va.October1948. . . . . .I-. . havealreadybeengiven,equatias(l),(6), (k), and(7
2、), respectively.Amod.ified-liftinbutbecauseofthe.ayproximatenatureoftheequationspresentedendbecauseofllmitaticmsofthePrendtlGZauertfactor,suchanapplicatimisconsideredtobeunwarranted.ZUgeneral,itisfoundinpracticethatthechangesinboundary-layercharacteristics,whichaccapenychangesinMachnumber,maybeatlea
3、stasimportentwithregardtohingemmentsastheso-calledfirhrderMachnuaibereffectsonthesurfacepressures,whichexeaccuuntedforbythePrendtl-Glauertcorrection.TheUV6* effectofMachnmiberOnhingemaments,therefwe,isfregpentlyfoundtobeconsiderablydifferentf!ramthatwhichisindicatedthrohaicationofthePranatlaeztfactt
4、i. TestresultsgenerallyhaveindicatedsmalleffectsofsubcriticalvariationsinMachnumbera thehing ntparametersofcantrolsurfaceshavingtrailhfhtersl-cmtrlResearch.HACATiNo.1245,1947: .9. Bates,theWilliamR.: CollectionsndAnalysisofWind-TunnelDataonCharacteristicsofIsolatedTailSurfaceswithandwithoutPlates.WA
5、 NO. 91, 1947. . -r- _ -.- -. . -“ ,.IProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I.I!IMdd1.3.45678(A (J8)$a 0.48M .m4.6 .50IJ5 .50w .476 .55ti .55a .55(%)q (%)- (i!).mntla (%=).Aim(%)*,C2 .amp.31 QAI L.m -oJnM O.fil O.lq -o.oql -o.cccy-tdMM.s 4.
6、oo-m -=%.!s .47 .OoL%2.31. .Q5 . Olq .lq -.Oo1oQ .00% -.*6.m3%.50.6333m.!20.s0.97.97.mw-A4 .w .OoM.4k .m .mx.-Xm9. om7 .*-.m35.Cu?l-.mk?.*4W -.m35.Uo.3-.m175. A= 3.6 .70/6o .2 .4 ,6 .8 LOJJw.-ExyMrimwh/Culculux?d- - - - II I I I- - - - - %s/ -1.(b)A3.5; A=48.6:I0 2 .4 .6 .8 4063Figure 2.- Comparison of calculated and experimental values of the hinge-moment parameters of plainsealedcontrolStiaces. CL = 0.IProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
