Aerodynamic properties of Libellula quadrimaculata L. (Anisoptera: Libellulidae), and the flow around smooth and corrugated wing section models during gliding flight

Polar curves of single wings and paired ipsilateral wings of L. quadrimaculata and of the whole animal in gliding flight posture at two Reynolds numbers are presented. All curves are distinguished by their rather level climax at maximum lift coefficient. Display of flow around wing section models compared with smooth models exhibits an effect of corrugation only at high Reynolds numbers and great angles of attack not relevant for gliding flight.