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1、NASAFactsNationalAeronauticsandSpaceAdministrationDrydenFlightResearchCenterP.O.Box273Edwards,California93523Voice661-276-3449FAX661-276-3566pao@dfrc.nasa.govFS-2002-034-DFRCPathfinderLeadingthewayinsolarflightThePathfinderPlusflewtwocommercializationdemonstrationmissionsoverHawaiiin2002.--N
2、ickGalante/PMRFforNASAJustimagine...·Anaircraftthatcouldstayaloftallday,poweredonlybysunlight.·Anaircraftthatisnomorethanaflyingwing,abletomaneuverwithoutrudders,ailerons,tailsorothercontrolsurfacestypicalofconventionalaircraft.·Anaircraftthatflieswithoutanonboardhumanpilot,butinsteadiscontr
3、olledremotelyfromagroundstation.AttheNASADrydenFlightResearchCenteratEdwards,Calif.,imaginationhasbecomereality,andthatrealityisthePathfindersolar-powered,remotelypilotedaircraft.AircraftDescriptionThePathfinderisalightweight,solar-powered,remotelypilotedflyingwingaircraftthatisdemonstrating
4、thetechnologyofapplyingsolarpowerforlong-duration,high-altitudeflight.Itisliterallythepathfinderforafuturefleetofsolar-poweredaircraftthatcouldstayairborneforweeksormonthsonscientificsamplingandimagingmissions.Solararrayscoveringmostoftheupperwingsurfaceprovidepowerfortheaircraft?selectricmo
5、tors,avionics,communicationsandotherelectronicsystems.Pathfinderalsohasabackupbatterysystemthatcanprovidepowerforbetweentwoandfivehourstoallowlimited-durationflightafterdark.1Pathfinderfliesatanairspeedofonly15to25mph.Althoughpitchcontrolismaintainedbytheuseoftinyelevonsonthetrailingedgeofth
6、ewing,turnsandyawcontrolareaccomplishedbyslowingdownorspeedingupthemotorsontheoutboardsectionsofthewing.Pathfinderwasdesigned,builtandisoperatedbyAeroVironment,Inc.,ofMonrovia,Calif.,thefirmthatdevelopedthepioneeringGossamerPenguinandSolarChallengersolar-poweredaircraftinthelate1970?sandearl
7、y1980?s.PathfinderFlightHistoryPathfinderwasfirstdevelopedforanow-cancelledPathfindersoarsaloftfromNASADrydenonthefirstofitsrecordclassifiedgovernmentprogramintheearly1980?stodevelopaltitudeflightsonSept.11,1995.ahigh-altitude,long-enduranceaircraf
