We all know that plywood can be bent (not "tortured") over conic sections. Thus, V-bottom boats using a single sheet of ply on each side of their keel often have curved section shapes toward the bow - think the Core Sound 17 &20 or Arch Davis' Ace 14.
However, I noticed that Dudley Dix's Cape Henry designs, of 19 and 21 feet, while using a wide plywood garboard strake, show straight sections at the bow. WaterCraft Magazine, doing a how-to-build-it series on the 21 footer went into some detail on fitting the 9mm garboard strake. They kerfed it and steamed it, but did not mention torturing it, that is; making it assume a non-developable shape.
I thought that torturing ply was only workable on very light structures ( Paul Gartside's Flashboat). Anybody have any light to shed on this?