Using Drag to Hover

Details Using Drag to Hover Using Drag to Hover

2003-04-18

arxiv.org/abs/physics/0304069v1

Physics

Fluid Dynamics

8 pages

Scientific paper

Unlike a helicopter, an insect can, in theory, use both lift and drag to stay
aloft. Here we show that a dragonfly uses mostly drag to hover by employing
asymmetric up and down strokes. Computations of a family of strokes further
show that using drag can be as efficient as using lift at the low Reynolds
number regime appropriate for insects.

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