scholarly journals Curved leading edges and wing tips help enhance the lift on insect wings

2020 ◽  
Author(s):  
Shantanu Bhat ◽  
Mark Thompson
Keyword(s):  
Insect Wings ◽  
Leading Edges ◽  
Wing Tips

Bionic Flexible Wings Design of the Flapper

2013 ◽  
Vol 461 ◽  
pp. 178-183
Author(s):  
Ben Zheng Dong ◽  
Chang Long Li ◽  
Ai Hong Ji
Keyword(s):  
Thrust Force ◽  
Flapping Wing ◽  
Flexible Wings ◽  
Metal Composites ◽  
Ionic Polymer Metal Composites ◽  
Ionic Polymer ◽  
Insect Wings ◽  
Polymer Metal ◽  
Wing Tips ◽  
Rigid Wing

The fixed-wing aircrafts rely mainly on thrust generated by engine and lift produced by wings to keep flying, so there are strict requirements on their speeds and attack angles. The flappers can hover freely in the air like insects because they have different flight principles and forms compared with fixed-wing aircrafts. The flapper is consisted of the flapping-wing, the flapping-wing mechanism and the drive. The flapping-wing is used to generate lifts and thrusts while the wing mechanism and the drive provide main power to the flapping wing. Traditionally, flapper uses rigid wing to provide lift and thrust force. The researches of the insect flapping wing process indicate insect wings would produce certain flexibility and umbrella effect in this process. Based on the above research, the compression molding is employed to manufacture the bionic flexible wing in this article. Whats more, in order to imitate the umbrella deformations at the wing tips, IPMC (Ionic Polymer Metal-Composites) are fixed on the flexible wings to achieve umbrella deformations.

THE INVESTIGATION OF THE PREFERABLE INTERFERENCE OF A TRACTOR AND PUSHER PROPELLERS MOUNTED ON THE WING TIPS

2017 ◽  
Vol 48 (1) ◽  
pp. 1-9
Author(s):  
Aleksandr Vyacheslavovich Kornushenko ◽  
Oleg Valentinovich Kudryavtsev ◽  
Leonid Leonidovich Teperin ◽  
Ludmila Nikolaevna Teperina ◽  
Andrei Viktorovich Shustov ◽  
...  
Keyword(s):  
Wing Tips

Transitions of shock interactions on V-shaped blunt leading edges

2021 ◽  
Vol 912 ◽  
Author(s):  
Zhiyu Zhang ◽  
Zhufei Li ◽  
Jiming Yang
Keyword(s):  
Shock Interactions ◽  
Leading Edges

Abstract

Blood Circulation in Insect Wings

1964 ◽  
Vol 96 (1-2) ◽  
pp. 98-98 ◽  
Author(s):  
J. W. Arnold
Keyword(s):  
Blood Circulation ◽  
The Body ◽  
Insect Wings ◽  
Wing Structure ◽  
Wing Veins ◽  
Taxonomic Groups ◽  
Modified Forms ◽  
Surrounding Membrane

Despite their inert appearance, the wings of insects are living appendages and are supplied with blood. This is true for definitive wings as well as for developing ones, and for modified wings such as tegmina, elytra, hemelytra, and halteres as for those that are specialized for flight. Typically the blood circulates only through the wing veins, but in some insects it escapes into the surrounding membrane in certain areas, and in highly modified forms it may be entirely unconfined. The course of circulation is basically the same in the wings of most insects. It flows outward from the body in the costo-medial veins, moves toward the posterior margins via cross-veins, and returns to the body through the cubito-anal veins and axillary cord. However, rhe precise route followed is highly variable concomitant with distinctive patterns of venation in different taxonomic groups and with wing structure. This is illustrated for a number of orders.

scholarly journals Preliminary investigation of use of flexible folding wing tips for static and dynamic load alleviation

2016 ◽  
Vol 121 (1235) ◽  
pp. 73-94 ◽  
Author(s):  
A. Castrichini ◽  
V. Hodigere Siddaramaiah ◽  
D.E. Calderon ◽  
J.E. Cooper ◽  
T. Wilson ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Preliminary Investigation ◽  
Aircraft Design ◽  
Dynamic Loads ◽  
Induced Drag ◽  
Aeroelastic Model ◽  
Static And Dynamic Loads ◽  
Folding Wing ◽  
Wing Tips ◽  
Wing Tip

ABSTRACTA recent consideration in aircraft design is the use of folding wing-tips with the aim of enabling higher aspect ratio aircraft with less induced drag while also meeting airport gate limitations. This study investigates the effect of exploiting folding wing-tips in flight as a device to reduce both static and dynamic loads. A representative civil jet aircraft aeroelastic model was used to explore the effect of introducing a wing-tip device, connected to the wings with an elastic hinge, on the load behaviour. For the dynamic cases, vertical discrete gusts and continuous turbulence were considered. The effects of hinge orientation, stiffness, damping and wing-tip weight on the static and dynamic response were investigated. It was found that significant reductions in both the static and dynamic loads were possible. For the case considered, a 25% increase in span using folding wing-tips resulted in almost no increase in loads.

A magnetic fluid microdevice using insect wings

2008 ◽  
Vol 20 (20) ◽  
pp. 204142 ◽  
Author(s):  
S Sudo ◽  
K Tsuyuki ◽  
T Yano ◽  
K Takagi
Keyword(s):  
Magnetic Fluid ◽  
Insect Wings

The influence of wing morphology and echolocation on the gleaning ability of the insectivorous bat Myotis tricolor

2004 ◽  
Vol 82 (12) ◽  
pp. 1854-1863 ◽  
Author(s):  
Samantha Stoffberg ◽  
David S Jacobs
Keyword(s):  
Discriminant Analysis ◽  
Foraging Behaviour ◽  
Myotis Lucifugus ◽  
The Other ◽  
Wing Morphology ◽  
Echolocation Calls ◽  
Narrow Bandwidth ◽  
Mole Crickets ◽  
Wing Tips ◽  
Wing Tip

On the basis of its external morphology, Myotis tricolor (Temminck, 1832) should be able to both aerial-feed and glean. Furthermore, this bat is known to use broadband calls of short duration, reinforcing the prediction that it gleans. However, results from this study indicate that M. tricolor does not commonly glean. This conclusion was reached after studying the foraging behaviour of M. tricolor in a flight room. We presented M. tricolor with mealworms, moths, mole crickets, beetles, and cicadas in a variety of ways that required either gleaning and (or) aerial feeding. Although M. tricolor readily took tethered prey, it did not take any of the variety of insects presented to it in a manner that required gleaning. We therefore compared its wing morphology and echolocation calls with those of several known gleaners, Nycteris thebaica E. Geoffroy, 1818, Myotis lucifugus (Le Conte, 1831), and Myotis septentrionalis (Trouessart, 1897), and an aerial forager, Neoromicia capensis (A. Smith, 1829). In a discriminant analysis wing-tip shape was the only variable to provide some degree of discrimination between species, with M. tricolor having more pointed wing tips than the known gleaners. Discriminant analysis of echolocation-call parameters grouped M. tricolor with the other Myotis species and separated it from N. capensis and N. thebaica. However, M. tricolor did not use harmonics as did the other Myotis species. The apparent failure of M. tricolor to glean might therefore be due to its relatively pointed wings and narrow-bandwidth echolocation calls, owing to the absence of harmonics in its calls.

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