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Fig. 10. Lift coefficients are plotted as functions of time for a one-winged fling
half-stroke. The letters i–vi along the x axis correspond to
the times the streamlined plots labelled i–vi in
Fig. 7B were drawn. The angle
of attack during pure translation was set to 45°. The Reynolds number
(Re) was varied by changing the translational velocity of the wing
from 0.00375 to 0.06 m s–1. The first peak in lift
corresponds to the lift forces generated during wing rotation. The second peak
corresponds to the lift forces generated during translational acceleration.
For Re=64 and above, lift coefficients fall as the leading edge
vortices separate from the wings.
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