Continuously variable aerofoil shapes

Abstract

The present-day layout of sailplanes is still a compromise limited by the likelihood of meeting certain up-current forms and strengths.  Particularly in the case of fast long-range sailplanes the determination of optimum circling flight in weak up-currents by finding the most favorable radius of the turn is important..... In the following, the well-known idea of variable aerofoil shape is discussed.