Wofgang, I'd have to disagree. Since the purpose of lifting strakes is to provide a (more or less) horizontal planing surface to lift the boat higher out of the water than it would normally be, planing solely on the flat surface of the V shaped bottom, which it does partially by capturing the water and preventing it from "squirting" outward past the chines, I'd say Walwork's overlap design effectively accomplishes that. And bottom concavity is not necessarily a bad thing.
I'm not a Naval architect, but it seems logical to me.
You can also see the overlap design in this shot on page 73 of the Wooden Boat magazine article:
http://www.woodenboat-digital.com/wo...304?pg=82#pg82
Eric
Bookmarks