Primitive Archer
Main Discussion Area => Bows => Topic started by: Newindian on September 21, 2014, 02:07:49 pm
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I lieraly had just finished this bow when I went to string it and the string popped out, realized I needed to deepen the nocks alittle. When I fixed that I strung and drew it no problems. Then I sat down to look it over and found this. The bow is sinew backed
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usually I am very optimistic bout fixing things,, that looks bad,,, I dry fired a sinew bow with similar results,,, I sinew wrapped the whole break,,, and it worked,, did not fall apart,, but was never the same ,, tiller or performance,,, you could try that as you have nothing to loose at this point,, it is to your advantage that the break did not go to the back,,the sinew wrap should be thick,, we are not going for a beauty contest at this point,, just seeing if you can get it to hold together,, I know alot are going to post that it is toast,, and that may be true,, but it sure wont hurt to see what happens if you wrap it,, assuming you are wearing your safety gear to test it :)
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A clean crack across the belly is actually irrelevant ! :o
the belly is in compression and the crack just closses, I've had it happen when heat treating some reflex into a bow.
BUT Obviously it's not viable to leave it like that and the longitudinal split is V orrying. IMO your only hope is to rasp out a curved section from the belly and let in a matching piece.
If you look at this blog entry, you will see the crack I fixed.
http://bowyersdiary.blogspot.co.uk/2013/04/wobbly-stave-and-ugly-tiller.html (http://bowyersdiary.blogspot.co.uk/2013/04/wobbly-stave-and-ugly-tiller.html)
Subsequent posts show it being flexed with the crack and then the stages of patching it. This wasn't a sinew backed bow. But I think this is your only hope.
Del
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i like your idea Del,,, do you think someone might try the patch you are referring to ,, after seeing if the sinew wrap would work,, or do you think trying the wrap might compromise the method you suggest,,???
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I just put a wrap on it using as much upper body strength as I have in order to take some pics incase it blows up, it held with no unsettling noise for a full draw, I will post these "death photos" in a few minuets
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i like your idea Del,,, do you think someone might try the patch you are referring to ,, after seeing if the sinew wrap would work,, or do you think trying the wrap might compromise the method you suggest,,???
Short answer...
"Don't know".
Long answer...
"D_o_n'_t K_n_o_w" ;)
I've not done much with sinew...
Del ::)
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I'm taking this as a good sign, but now I have an arrow to fix
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Horn bows and others have been made with several belly pieces just butted together. As Del said, it's all compression force. Your break however seems to have a lifting component. I would saturate the break with super glue, wrap with inner tube till cured, then sand lightly and wrap with damp sinew set in either hide glue or Titebond II. You do need to keep that break from bridging upward, as it looks inclined to do.
Jim Davis
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Looks scary to me... Good luck
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yes and maybe just shoot that bow on special occasions,,, :)