Hi-
If you don't have enough displacement from your hulls (i.e. cubic feet of inside space) the driving force of the wind on the main plus if your weight is not placed far enough to the rear windward croosbar will drive the leeward hull first, then the windward hull straight down into the water, and then your crew comes flying around on the trapeze to add more weight in front of the crossbar and over you go !!!

Paul Jr.