Results 211 to 220 of about 4,991 (249)
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Folding in and out: passive morphing in flapping wings
Bioinspiration & Biomimetics, 2015We present a new mechanism for passive wing morphing of flapping wings inspired by bat and bird wing morphology. The mechanism consists of an unactuated hand wing connected to the arm wing with a wrist joint. Flapping motion generates centrifugal accelerations in the hand wing, forcing it to unfold passively.
Amanda K, Stowers, David, Lentink
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Vibration and Flutter Characteristics of a Folding Wing
46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 2005Studies are presented that characterize the dynamic aeroelastic aspects of a morphing aircraft design concept. The notion of interest is a folding wing design resulting in large-scale wing area changes. A finite element approach is used to investigate the sensitivity of natural frequencies and flutter instabilities to the wing position (e.g., fold ...
Matthew P. Snyder +3 more
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The Canadian Entomologist, 1894
Aside from the wasps distinguished by their folded wings (Diploptera) and the Chalcidian genus Leucospis, there is no record, unless of distant date, of any Hymenopterous insect having the wings folded. In Coptera the “longitudinal fold” described by Say is in reality a pleat of ridge; the wings, as I have repeatedly observed in the living insect ...
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Aside from the wasps distinguished by their folded wings (Diploptera) and the Chalcidian genus Leucospis, there is no record, unless of distant date, of any Hymenopterous insect having the wings folded. In Coptera the “longitudinal fold” described by Say is in reality a pleat of ridge; the wings, as I have repeatedly observed in the living insect ...
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Development of the weight formula for a folding wing
Russian Aeronautics, 2012The classification of methods for carrier-based aircraft wing folding is presented. We determined the factors influencing the folding axis position and the mass increase of the wing being folded. We also suggested a technique of deriving the folding wing mass formula by an example of the wing rotation around the axis, which is parallel to the aircraft ...
M. V. Yarygina, Yu. I. Popov
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Eureka!, 2018
While the concept of a laminar flow wing is well-known, the need to mechanise flaps and control surfaces makes this an impossible reality. Unless, of course, you use a Shape Memory Alloy.
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While the concept of a laminar flow wing is well-known, the need to mechanise flaps and control surfaces makes this an impossible reality. Unless, of course, you use a Shape Memory Alloy.
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Characteristics of Slender Wing‐Body Combinations with Folding Wings
Aircraft Engineering and Aerospace Technology, 1959A method has been developed for computing aerodynamic loads on slender missiles with complicated cross‐sections. This method has been applied to the prediction of loads for missiles with folding wings. Comparison of theoretical calculations with supersonic wind‐tunnel measurements indicates that the method should provide satisfactory first estimates of
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Aeroelastic Studies on a Folding Wing Configuration
46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 2005Morphing aircraft can change shape and size substantially in-flight to enable a single vehicle to perform multiple mission roles. The majority of shape change occurs in the wing, resulting in a wide variety of changes in aerodynamic and structural features. In addition, as the wing moves during flight, the stiffness is reduced. One strong candidate for
Dong Hwan Lee, Terrence Weisshaar
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Fog spontaneously folds mosquito wings
Physics of Fluids, 2015The flexibility of insect wings confers aerodynamic benefits, but can also present a hazard if exposed to fog or dew. Fog can cause water to accumulate on wings, bending them into tight taco shapes and rendering them useless for flight. In this combined experimental and theoretical study, we use high-speed video to film the spontaneous folding of ...
Andrew K. Dickerson +3 more
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2000
Although insects are winged animals there can be few species, if any, that spend more time in the air than on the ground. For convenience and protection it is imperative that their delicate membranes can be safely stowed away when not in use. Dragonflies are one of the few groups to rest with the wings fully outstretched, the others having a basal ...
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Although insects are winged animals there can be few species, if any, that spend more time in the air than on the ground. For convenience and protection it is imperative that their delicate membranes can be safely stowed away when not in use. Dragonflies are one of the few groups to rest with the wings fully outstretched, the others having a basal ...
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The effect of folding on motion flapping wing aero vehicle
2017 IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI), 2017An interesting about MAV and a research for flapping wing aero vehicle has been increased. It is required that take-off and landing abilities to lift up a vehicle by flapping motion to achieve a special purpose for flapping wing aero vehicle. An airfoil has to generate lift force more than a weight of the body to work take-off from the ground without ...
Do Young Kim, Dongwon Yun
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