01936nam 2200577Ia 450 991069953970332120230902161603.0(CKB)5470000002403530(OCoLC)658193867(EXLCZ)99547000000240353020100826d1993 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierTakeoff/approach noise for a model counterrotation propeller with a forward-swept upstream rotor[electronic resource] /Richard P. Woodward, ... [and others][Cleveland, Ohio] :[National Aeronautics and Space Administration, Lewis Research Center],[1993]1 online resource (21 pages) digital, PDF fileNASA technical memorandum ;105979Title from title screen (viewed Aug. 25, 2010).Includes bibliographical references (page 7).NASA technical memorandum ;105979.Acoustic propertiesnasatAeroacousticsnasatAircraft noisenasatApproachnasatContrarotating propellersnasatCounter rotationnasatSound pressurenasatTakeoffnasatTurboprop aircraftnasatWind tunnel testsnasatAcoustic properties.Aeroacoustics.Aircraft noise.Approach.Contrarotating propellers.Counter rotation.Sound pressure.Takeoff.Turboprop aircraft.Wind tunnel tests.Woodward Richard P1411998Lewis Research Center.GPOGPOBOOK9910699539703321Takeoff3537732UNINA