I am putting a Dipping Lug sail on Rumpus. This sail requires the tack (front corner of the sail) be secured to a point somewhere in front of the mast. In my design, the tack will be 43 inches in front of the mast and the yard (the stick at the top of the sail) will extend 24 inches in front of the mast, resulting in roughly 30% of the sail will be in front of the mast.