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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. Copyright protection is not available for this work in the United States.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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