Abstract
ABSTRACT The variations in several kinematic parameters of Calliphora erythrocephala were studied on flies flying in a wind tunnel. Variation was equally pronounced at both the and bottom of the wingstroke. The wakes of Calliphora erythrocephala and Phormia regina flying in moving air exhibited extremely low turbulence, while considerable turbulence indicative of stall was present in the wakes of flies flying in still air. The air velocities recorded as functions of time in the wakes of both Phormia and Calliphora are consistent with most lift being produced in the downstroke, with the first part of the upstroke also contributing to the production of lift.
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