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dc.contributor.advisorJones, Kevin D.
dc.contributor.authorRandall, Brian H.
dc.date.accessioned2012-03-14T17:42:24Z
dc.date.available2012-03-14T17:42:24Z
dc.date.issued2002-09
dc.identifier.urihttp://hdl.handle.net/10945/4603
dc.description.abstractIn this paper, flapping-wing propulsion as a means of drag reduction for light sailplanes is investigated numerically. The feasibility of markedly improving minimum sink and L/Dmax performance parameters in light sailplanes by flapping their flexible, high aspect ratio wings at their natural frequencies is considered. Two propulsive systems are explored: a humanpowered system that is used to partially offset airframe drag, and a sustainer system that uses an electric motor with sufficient power for limited climb rates. A numerical analysis is conducted using a strip-theory approach with UPOT (Unsteady Potential code) data. Thrust and power coefficients are computed for 2-D sections. 3-D spanwise load factors are applied to calculate total wing thrust production and power consumption. The results show that theoretical drag reduction in excess of 20%, and improvements of minimum sink by 24% are possible with a human-powered flapping system.en_US
dc.description.urihttp://archive.org/details/flappingwingprop109454603
dc.format.extentxiv, 96 p. : ill. (some col.) ;en_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.subject.lcshGliders (Aeronautics)en_US
dc.subject.lcshDrag (Aerodynamics)en_US
dc.titleFlapping-wing propulsion as a means of drag reduction for light sailplanesen_US
dc.typeThesisen_US
dc.description.versionApproved for public release; distribution is unlimiteden_US
dc.contributor.secondreaderPlatzer, Max F.
dc.subject.authorFlapping-Wing Propulsionen_US
dc.subject.authorDrag-Reductionen_US
dc.subject.authorLight Sailplanesen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Aeronautical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineAeronautical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.verifiednoen_US


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