> Sails are curved so they act like foils with wind moving faster of the outer surface than the inner surface creating forward thrust. https://en.wikipedia.org

> Sails are curved so they act like foils with wind moving faster of the outer surface than the inner surface creating forward thrust. https://en.wikipedia.org/wiki/List_of_common_misconceptions#Physics https://en.wikipedia.org/wiki/List_of_common_misconceptions#...