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dc.contributor.authorFaulkner, Henry B.en_US
dc.contributor.otherUnited States. National Aeronautics and Space Administrationen_US
dc.contributor.otherMassachusetts Institute of Technology. Flight Transportation Laboratoryen_US
dc.date.accessioned2012-01-06T06:50:57Z
dc.date.available2012-01-06T06:50:57Z
dc.date.issued1974en_US
dc.identifier02394570en_US
dc.identifier.urihttp://hdl.handle.net/1721.1/67961
dc.descriptionAugust 1974en_US
dc.descriptionIncludes bibliographical references (p. 48-50)en_US
dc.description.abstractThe relationship between direct operating cost and departure noise annoyance was developed for commercial tilt rotor aircraft. This was accomplished by generating a series of tilt rotor aircraft designs to meet various noise goals at minimum DOC. These vehicles were spaced across the spectrum of possible noise levels from completely unconstrained to the quietest vehicle that could be designed within the study ground rules. A group of optimization parameters were varied to find the minimum DOC while other inputs were held constant and some external constraints were met. This basic variation was then extended to different aircraft sizes and technology time frames. It was concluded that reducing noise annoyance by designing for lower rotor tip speeds is a very promising avenue for future research and development. It appears that the cost of halving the annoyance compared to an unconstrained design is insignificant and the cost of halving the annoyance again is small.en_US
dc.description.sponsorshipPrepared under contract for the Ames Research, Center National Aeronautics and Space Administrationen_US
dc.format.extent[153] p. in various pagings ([iv], 50, 1-1 to 1-91, 2-1 to 2-14 p.)en_US
dc.publisherCambridge, Mass. : Flight Transportation Laboratory, Massachusetts Institute of Technology, [1974]en_US
dc.relation.ispartofseriesNASA contractor report ; NASA CR-137552en_US
dc.relation.ispartofseriesFTL report (Massachusetts Institute of Technology. Flight Transportation Laboratory) ; R74-5en_US
dc.subjectVertically rising aircraften_US
dc.subjectHelicoptersen_US
dc.subjectNoiseen_US
dc.titleThe cost of noise reduction in commercial tilt rotor aircraften_US
dc.typeTechnical Reporten_US


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