Some people make a way to heat the wood that they want to bend. The heat softens the sap/resin in the wood so there is probably not much if any spring back if the softened wood is placed into a jig and left for the sap/resin to reharden or normalize. I have seen photos of some vertical ovens that have been made. They were just simply a tall pipe or can sitting above a pot with steaming water where the rising steam heats the wood and softens the resin in it. Do some looking around on the Internet and I am sure you will find information on this. The ones I have seen were used to soften 1/4"x 1/2" spruce sticks for easy bending the top and bottom sticks for placement into wing rib jigs for the Wittman Tailwind wings. The Tailwind wing uses made up ribs that are placed onto the wing spars then the whole wing surface is covered with thin plywood and now days most builders put a thin layer of fiberglass cloth over that to seal the plywood.
Larry H On Oct 16, 2011, at 8:22 AM, "Ed" <bee...@localnet.com> wrote: > Hi Matt > I would really like to hear any advise you might have for someone > considering a "bent" center spar . I was going to purchase new spruce stock > possibly 1/4" thick to laminate them. Also any ideas for dealing with the > "spring back" effect that happens when a bent lamination is removed from the > clamps? Ed > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
