...best way is to look at "Phil's foil" page,
http://www.philsfoils.com/designTips.html#gybingheadIt seems to me that if trailing edge of daggerboard is fixed in the trunk, but front edge is a bit sloppy, it produces the efect of a gybing board. No extra mods necessary. What am I missing?
Nothing. This is precisely what the Penguin class has been doing with their centreboards for more than 30 years. I think it is the only solution for centreboards and works well in daggerboards as well.
Phil's Foils design has one big advantage over a sloppy board: it becomes symetrical when lifted (downwind).
