I have been tapped by my power squadron to teach a new seminar course on sail trim. It's a two-hour course and I have yet to review the course material. However, I'm wondering if there exists any interactive software that will show the effect of sail controls on the shape and pulling power of a main and jib. For instance, it would be nice to see how a tale-tail responds to adjusting the angle of attack of the main or the position of the sheet for a headsail. Any suggestions would be appreciated.
