Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"wingtips"”.
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Aerodynamic Analysis of Variable Geometry Raked Wingtips for Mid-Range Transonic Transport Aircraft
… of treatment are blended winglets and raked wingtips. With Boeing currently investigating novel designs for its next generation of airliners, a variable geometry raked wingtip novel control effector (VGRWT/NCE) was studied to determine the aerodynamic performance benefits over an untreated …
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From Warriors to Wingtips: The Leadership Transition of Retired Officers into the Public Sector
For personal and financial reasons some retired military officers seek second careers in the public sector. In entering local government, they are leaving a unique organization, and encountering a very different organizational culture. This study used grounded theory methodology to identify the key …
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Hydrodynamic Impact Analysis and Testing of an Unmanned Aerial Vehicle
… positioned at five locations, including the wingtips. This allowed conclusions to be drawn with respect to the loads experienced on impact throughout the airframe. This data was also used to find loads corresponding to the maximum decelerations experienced during impact. These loads were …
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Experimental Characterization of Additively Manufactured Multi-Feather Wingtip Devices
… the fuel efficiency via these experimental wingtips. An associated secondary objective was to establish a method for manufacturing complex structures suitable for wing tunnel testing. A manufacturing technique that involved using composite weaves to reinforce additively manufactured …
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Wing Deflection Analysis of 3D Printed Wind Tunnel Models
… method was used to measure the deflection of the wingtips for structural data. Both numerical simulations and experiments were evaluated at Reynolds numbers of 258,000 and 362,000 at 0 degrees angle of attack, and 258,000 at 5 degrees angle of attack.</p> <p>Results indicate that the wing wake …
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Experimental Determination of Lift and Lift Distributions for Wings In Formation Flight
… and the shedding of vorticity inboard of the wingtips were observed. To determine the circulation distributions for the trailing wing, the initial method is modified. By processing velocity information acquired in a near-field plane, both the lift and induced drag were calculated for the …
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Aspect ratio effects on wings at low Reynolds numbers
… flow visualization it was ascertained that the wingtips have a rather restricted effect on the laminar separation bubble. The disappearance of the bubble extends only for a small distance inboard from the tips. The size of the hysteresis loop and the Reynolds number at which hysteresis starts …
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Scanning Probe Study of N-Heterocyclic Carbene Self-Assembly on Coinage Metal Surfaces
… around the exo-cyclic nitrogen groups called 'wingtips’. However, several areas remain unaddressed, particularly how backbone modifications of the NHC or differing substrates impact the self-assembly of NHCs. By modifying NHC structures and depositing NHCs onto different surfaces, this thesis …
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Study of the compliance and system integration of bistable structures for use as actuation mechanisms in bioinspired adaptive systems
… mechanism to control the spacing between wingtips on small aerial vehicles. Prototypes of the truss mechanism are fabricated using a Stratasys Objet 3D printer, and the force-displacement profile of the mechanisms are measured using a universal testing machine. The force-displacement …