Leading-edge vortices in insect flight

Article Abstract:

Stereophotography was used to visualize and document the three-dimensional flow of smoke around the wings of the hawkmoth Manduca sexta as part of an investigation on insect flight. It was shown that an intense low pressure region above the wing called the leading-edge vortex which is formed during the downstroke movement of the wing provides the high-lift forces that keep insect flight steady.

Moths, Insects, Insect flight, Photography, Stereoscopic, Stereoscopic photography, Leading edges (Aerodynamics)

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Rubber bands reduce the cost of carrying loads

Article Abstract:

Bungee cords are used to suspend the load from a backpack frame, which has helped in reducing the vertical movement, vertical force on the carrier and also the energetic cost of walking with the backpack. The suspended-load ergonomic backpacks, with lower vertical force, are useful for emergency personnel, as they have to carry equipment rapidly to disaster sites.

Health aspects, Backpacks, Bungee cords

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Flying and swimming animals cruise at a strouhal number tuned for high power efficiency

Article Abstract:

Research reveals that cruising birds, bats, and insects converge at the same narrow range of Strouhal number, St. Data indicate that by tuning cruise kinematics one can optimize Strouhal number, which causes oscillatory lift-based propulsion.

United Kingdom, Behavior, Kinematics, Animals, Bird flight

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