You can have a cambered foil/rudder made from one chord of a circle with a flat side. This never has to be rotated and has the same lift drag in both directions, but always gives lift force vector on the same side. The workings are the same, say 10% thickness, draw a line from the trailing edge to the middle of a vertical line at the chord max height. A perpendicular line drawn off it is the lift vector, and the angle between it and off the perpendicular of the base describes the drag.

This exact principle was described in Norwoods High Speed Sailing published around the 70s/80s somewhere, if I recall as a foil for a shunting proa

• Privacy • Unsubscribe • Terms of Use

SPONSORED LINKS