Results 11 to 20 of about 173,899 (302)
Animalopters - towards a new dimension of flight mechanics [PDF]
Transport, 2002 Recently, it has been recognised that flapping wing propulsion can be more efficient than conventional propellers if applied to very small-scale vehicles, so-called MAVs (micro air vehicles).
J. A. Goszczynski +3 more
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Separasi Aliran pada Permukaan Atas Airfoil Kumbang Kelapa dengan Metoda China Clay
Metal: Jurnal Sistem Mekanik dan Termal, 2020 This study is aimed at identifying airfoils by mimicking the curved shape of the wings of a flying animal. This interferes with what people did in ancient times to obtain objects capable of flying.
Benny Dwika Leonanda
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A linear systems analysis of the yaw dynamics of a dynamically scaled insect model [PDF]
, 2010 Recent studies suggest that fruit flies use subtle changes to their wing motion to actively generate forces during aerial maneuvers. In addition, it has been estimated that the passive rotational damping caused by the flapping wings of an insect is ...
Dickinson, Michael H. +3 more
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Animal migration research takes wing [PDF]
Current Biology, 2018 In the beginning there was great confusion about animal migration. Aristotle, noting that the types of birds around him changed with the seasons, concluded that summer redstarts turned into robins at the onset of winter, and that garden warblers became blackcaps [1]. Others thought that birds disappear in winter because they hibernate submerged in mud.
openaire +2 more sources
Ways that Animal Wings Produce Sound
Integrative and Comparative Biology, 2021 SynopsisThere are at least eight ways that wings potentially produce sound. Five mechanisms are aerodynamic sounds, created by airflow, and three are structural sound created by interactions of solid surfaces. Animal flight is low Mach (M), meaning all animals move at <30% of the speed of sound.
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Of hummingbirds and helicopters: Hovering costs, competitive ability, and foraging strategies [PDF]
, 2004 Wing morphology and flight kinematics profoundly influence foraging costs and the overall behavioral ecology of hummingbirds. By analogy with helicopters, previous energetic studies have applied the momentum theory of aircraft propellers to estimate ...
Altshuler, Douglas L. +2 more
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Theoretical modelling of wakes from retractable flapping wings in forward flight [PDF]
PeerJ, 2013 A free-wake method is used to simulate the wake from retractable, jointed wings. The method serves to complement existing experimental studies that visualise flying animal wakes.
Ben Parslew, William J. Crowther
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PERFORMANCE OF THREE BROILER HYBRIDS FEEDING DIETARY WITH ANIMAL OR VEGETABLE PROTEIN RESOURCE : [PDF]
Mesopotamia Journal of Agriculture, 2012 This study was conducted to determine the effect of hybrid type, source of diet protein , sex of bird and their interaction on carcass cuts and some characteristics of blood , Three hybrids bred from broiler (Cobb 500, Ross 308 and Hubbard Classic) by ...
Hazim AL-kassab
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Take-off mechanics in hummingbirds (Trochilidae) [PDF]
, 2004 Initiating flight is challenging, and considerable effort has focused on understanding the energetics and aerodynamics of take-off for both machines and animals.
Altshuler, Douglas L. +2 more
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The Social Organization of Honey Bees
EDIS, 2015 A honey bee colony is a superorganism, which means that together its members function like a single animal. Bees within a colony work together like the cells in a human body.
Ashley N. Mortensen +2 more
doaj +5 more sources