The symmetry of wings and sails

Abstract

All of the principal items of flight performance involve steady flight conditions and equilibrium of the airplane. The same is true for the performance of boards and boats when sailing and foiling. A comparison of most basic parameters between aircrafts and sailcrafts reveals similarities in the understanding of the principal physical laws as well as variations and differences in their application to create a balance of forces when dealing with weight, lift, drag and driving forces (propulsion)