Primitive Archer
Main Discussion Area => Bows => Topic started by: Tree_Ninja on October 28, 2015, 10:17:50 pm
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After a recent disapointment (crysal and hinge on another bow) . I'm hoping to get second opinions on my bending more often.
Here's a 54" yew. 70#@24". Is it ok? It looks ok to me, but so did the others....
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Depends, what does the unbraced profile look like?
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That seems like a lot of stress, the tiller looks spot on from this perspective, but we would need to see the umbrace profile too to determine for sure.
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The shape is very good assuming it fits the profile. Tiller looks spot on.
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That's a real pretty bend :) :)
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That looks great hope it works out for you! :)
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Yes it looks good :).
But IMO you are setting yourself up to fail by going for relatively high draw weight in a short bow.
I can't really see the cross sectional shape of the bow, but it looks a bit ELB shaped to me and as such is highly stressed.
I'd be looking at nearer 60" length for that weight and draw, it gives you more safety margin.
2.4 x the draw length is good for an ELB at the heavier weights for safety.
Sure I like to see a bow bending hard, but if you want longevity go longer.
If that bow was a 35-40# it would be under a lot less stress and would be fine.
Just out of interest I have a nice Yew ELB 70# that is 70" long @ 28" (that's 2.5:1) and that is near the limit, drawing to 31" put in a lot of set (since removed with an extensive refurbishment).
Del
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Tiller looks good. The bow is a bit short for a 24" draw, I don't see a problem with the draw weight though. Being Yew you should have a D section bow to relieve some stress from the back
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Thanks everyone, I was concerned with the draw weight. It wasn't intended to be so high, I have taken some even scrapes off of both limbs.
I didn't really put this on the tiller tree too often, just tried from the begining to take wood off evenly. It isn't exactly a pleasure to shoot, and I will probally not draw it past 23" anymore. I might make a crossbow stock for it instead.
The unbraced profile is below, upper is left. I was worried about the knot 5" in from the tip on upper limb. There is a bit of a rounded belly, and the tips are pretty round too. Next time I think I might stick with a "design" and not just wing it.
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I'm with Del and Marc. It's doing very well, but if you round the tiller in the outer limbs to take some of the bending load off the middle, it'll stack when you start drawing it much farther, BUT, the middle is bending nicely, and pretty far now, and might be over strained if it has to take much more.
Good luck.
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How wide is it?
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Mr smart a$$ says...."use osage if ya wanna win" :laugh:
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well it seems like you already got a win,, if want to fine tune it even better,, :)