Abstract
The effects of strake vortex flaps (SVFs), determined experimentally, on the aerodynamic characteristics of a strake-wing configuration are presented. SVFs may improve cruise performance over that of a planar strake by partially unloading the strake and generating a thrust component. The magnitude of the nose-up pitching moment may also be reduced by unloading the strakes. The use of SVFs as lateral control devices is also investigated. The results indicate that cruise performance is improved for all vortex flap deflection angles compared to planar strakes, with minimal or no concomitant penalty at high lift coefficients. Positive pitching moment is also substantially reduced. Differentially deflected strakes appear to be capable of generating significant rolling moments at high angles of attack.
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