Primitive Archer
Main Discussion Area => Bows => Topic started by: sleek on January 02, 2015, 12:10:07 am
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So I just built a thin ring osage bow 64" ttt, stiff eiffel tips that were to be reflexed, and pyramid limbs. Im guessing thin ring stuff doesnt like a high stress design. At 45#@26" of draw ( was heading to 50@28 ) I heard it start to rip. I had to pull it twice more to finally find the spot starting to lift.
Plan is to use the tin rings to my advantage. Hopefully the splinter is following a ring and I can chase a ring under the splinter. With the rings being thin I hope to not loose much weight. Then I will chop 4" off the tips to bring the weight up, retiller the limb tips to get them more involved and relieve stress in the mid limbs, heat treat, and hopefully have a 40-45#@26" bow. We will see tomorrow.
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I've made heavy weight 70#+ bows from very thin ringed osage and had no problems.
Most problems with thin ringed osage come when the back ring is chased. Obviously it only takes a heavy scraper stroke to violate the ring pretty bad. You've got to go slowly with these staves.
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Sleek,, please put rawhide on that :)
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Thin ringed osage shouldn't be the cause for any splinter popping. Id investigate a bit deeper and see why it happened. Maybe too much heat, maybe a flat spot, maybe an overly challenging design for the stave. Something caused that and my bet isn't on the rings, unless they are violated.
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I don't think thin rings had anything to do with it
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Whatever caused it, I would hesitate to cut off 4" of length. You will be putting more stress on a piece of wood which already failed once.
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yes cutting it off and heat treating more sounds scary :)
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No, it wasnt the rings. It was my fault. Bad tiller. Got my wife to take a pic and I see it bending very much there. My fault entirely and no fault of the rings. I chased down 3 rings below it and the splinter is gone. I chopped it down 4" and its now 60" long. Working on the retiller. Idk what the weight will be but probably not much.
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Well I got it to 32@26 after retiller. Im going to do a light heat treat and call it good. It will make a nice target bow. Gonna heat in some reflex and maybe get it up to 35#@26. Then I will be happy. No need to back it, the damaged back has been completely removed. Thin ring is good like that, you cac scrape it off.
Good note above about taking it slow on thin ring. Its a pita chasing a ring on it.