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 20 of 21 for “"wing loading"”.
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Variation in mass and wing loading of nestling American Kestrels: possible effects of nestling behavior and adult provisioning behavior
… in some species must attain an efficient wing loading just prior to fledging to facilitate mobility for hunting and evading predators. My objective was to examine the mass of nestling American Kestrels (Falco sparverius) during the mid- to late nestling period and specifically to determine …
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Factors influencing pre-fledging mass recession of nestling Tree Swallows
… mass recession, possibly to achieve an optimum wing loading by the time of fledging. However, studies of aerial insectivores to date have been limited to two species of swifts (Apodidae), and additional studies of species of aerial insectivores are needed to determine if factors contributing to …
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Facultative adjustment of pre-fledging mass recession by nestling Chimney Swifts (Chaetura pelagica)
… ensuring fledglings will have an appropriate wing loading. My objectives were to determine if mass recession by Chimney Swift <em>(Chaetura pelagica)</em> nestlings is intrinsically controlled or facultatively adjusted by nestlings, and if mass recession is driven by changes in parental …
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Rearing density effects on premigrant traits of the fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)
… significantly decreased pupal weight and forewing width in the laboratory but not in the field. The greatest differences in developmental time among laboratory density treatments were 0.6 d and 1.07 d for females and males, respectively, but differences were not considered biologically …
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Aeroelastic Analysis of a Flexible Membrane Wing
… of a flexible lift augmentation system (LAS) wing. This research involves characterization of the forced vibration response of a wing appendage used to augment short field take off and landing (STOL) operations.</p> <p>Although flutter theory is now well understood, the LAS presents the …
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An experimental investigation of oblique wing static aeroelastic phenomena
… and moments produced by several clamped oblique wings. The wing sweep and aileron deflection angles were varied throughout a wide range of dynamic pressures. The wing structure was also stiffened. Strains were measured in the swept forward wing panels. Results from these tests showed that …
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Espaço ecomorfológico da fauna de quirópteros da região do Alto Tocantins, GO: uma perspectiva através da análise da morfologia alar
… Region were studied. Aspect-ratio (shape of the wing) and wingloading (body mass and wing size relationship) components were examined by Factor Analysis. The distances between the taxa were calculated by Euclidean distance and by the Pearson's product moment correlation coefficient. The resulting …
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Study of the microstructure and mechanical properties of hummingbird wing-bones
… the microstructural and mechanical properties of wing bones of an Anna's hummingbird (Calypte Anna) and a tree swallow (Tachycineta bicolor) was conducted to determine whether the hummingbird bones exhibited unique features due to the high wing loading of the bird. It was hypothesized that the …
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Local adaptation of Geoffroy's horseshoe bat, Rhinolophus clivosus, to the Cape floristic region of South Africa
… allometric responses in flight morphology. The wing shape of R. clivosus at De Hoop has not changed, resulting in a reduction in wing loading with a consequent increase in manoeuvrability. Thus R. clivosus at De Hoop is simply a scaled-down version of R. clivosus elsewhere and a scaled-up …
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Combat aircraft scenario tradeoff models for conceptual design evaluation
… design parameters such as thrust-to-mass ratio, wing loading, empty mass, maneuverability, etc. and operational parameters (e.g., weapon payload, range, loiter time, flight profiles, etc.) to the aircraft sortie survivability and lethality under various threat scenarios. This research proposes a …
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Impact of Liquefied Natural Gas usage and payload size on Hybrid Wing Body aircraft fuel efficiency
This work assessed Hybrid Wing Body (HWB) aircraft in the context of Liquefied Natural Gas (LNG) fuel usage and payload/range scalability at three scales: H1 (B737), H2 (B787) and H3 (B777). The aircraft were optimized for reduced fuel burn and airframe noise at approach, based on NASA N+3 goals …
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Gregarine parasitism in dragonfly populations of Central Texas with an assessment of fitness costs in Erythemis simplicicollis.
… between genders, among locations, among wing loads, and through time. Host fitness parameters measured included wing load, egg size, clutch size, and total egg count. Of the 37 dragonfly species surveyed, 14 species (38%) hosted gregarines. Thirteen of those species were previously …
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Multidisciplinary Design Optimization of an Extreme Aspect Ratio HALE UAV
… from a unique WWII-era project, a “pinned wing” HALE aircraft would employ self-supporting wing segments assembled into one overall flying wing. The research effort began with the creation of a multidisciplinary analysis environment comprised of analysis modules, each providing information …
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Influence of aspect ratio on dynamic stall of a finite wing
… AR, on the unsteady aerodynamics of pitching wings was examined by comparing experimental performance, flow measurements, and computational results across a range of different AR wings. Performance measurements were acquired for three wings of AR = 3, 4, 5, and an airfoil undergoing dynamic …
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Flapping wings for dual aerial and aquatic propulsion
… propulsion using a single set of flapping wings, offering an existence proof for favorable ow physics. Flapping wings thereby demonstrate a large force envelope, with capabilities far beyond the limits of static airfoil section coefficients, purely by changing the wing motion trajectory. …
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Conceptual Design for a Laminar-Flying-Wing Aircraft
The laminar-flying-wing aircraft appears to be an attractive long-term prospect for reducing the environmental impact of commercial aviation. In assessing its potential, a relatively straightforward initial step is the conceptual design of a version with restricted sweep angle. Such a design is the …
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Performance, Stability and Control of Electric Short Takeoff and Landing Aircraft
… One such arrangement is the electrically blown wing, where the slipstream of distributed, electrically-driven propellers arranged along the wing lead edge is used to enhance the wing lifting capability, enabling reductions in required field length or improvements in cruise efficiency compared to …
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The effect of turboprop propulsion on the aerodynamic benefits of formation flight
… to model the progression and interaction of the wing and turboprop trailing wakes. Within this programme, an initial prescribed wake for the turboprop engines was discretised by shed helicoidal vortex filaments generated by the use of an amalgamation of the propeller theory of Goldstein and …
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Target strength of bat prey in relation to pulse frequency and vegetation density in bat species, Rhinolophus fumigatus (Rüppell's horseshoe bat)
… between peak echolocation frequency and wing loading. Lower echolocation frequency penetrates dense vegetation more effectively than higher frequency pulses, resulting in greater energy for the generation of audible target strengths from the insect prey. Furthermore, a small body size …
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Návrh konstrukce křídla čtyřmístného jednomotorového letounu
Obsahom diplomovej práce je oboznámenie sa s lietadlom TL4000 a technickými parametrami krídla. Práca zahŕňa výpočet letových obálok podľa predpisu CS 23 v troch hmotnostných konfiguráciách a výpočet zaťaženia pre všetky body obálky. V práci je uskutočnený návrh konštrukcie krídla a jeho …
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