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Author Topic: I need a win  (Read 2355 times)

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Offline Tree_Ninja

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I need a win
« on: October 28, 2015, 10:17:50 pm »

  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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Offline Bryce

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Re: I need a win
« Reply #1 on: October 28, 2015, 10:22:40 pm »
Depends, what does the unbraced profile look like?
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Clatskanie, Oregon

Offline Aries

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Re: I need a win
« Reply #2 on: October 28, 2015, 11:01:58 pm »
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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Offline Badger

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Re: I need a win
« Reply #3 on: October 28, 2015, 11:29:02 pm »
  The shape is very good assuming it fits the profile. Tiller looks spot on.
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Offline DC

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Re: I need a win
« Reply #4 on: October 29, 2015, 12:02:44 am »
That's a real pretty bend :) :)
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Offline sieddy

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Re: I need a win
« Reply #5 on: October 29, 2015, 03:04:14 am »
That looks great hope it works out for you!  :)
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Offline Del the cat

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Re: I need a win
« Reply #6 on: October 29, 2015, 03:34:24 am »
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
« Last Edit: October 29, 2015, 03:48:08 am by Del the cat »
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Offline Marc St Louis

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Re: I need a win
« Reply #7 on: October 29, 2015, 09:29:51 am »
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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Offline Tree_Ninja

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Re: I need a win
« Reply #8 on: October 29, 2015, 10:19:47 am »
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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Offline Springbuck

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Re: I need a win
« Reply #9 on: October 29, 2015, 12:29:17 pm »
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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Offline Bryce

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Re: I need a win
« Reply #10 on: October 29, 2015, 01:00:35 pm »
How wide is it?
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Clatskanie, Oregon

blackhawk

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Re: I need a win
« Reply #11 on: October 29, 2015, 01:04:22 pm »
Mr smart a$$ says...."use osage if ya wanna win"  :laugh:

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Offline bradsmith2010

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Re: I need a win
« Reply #12 on: October 29, 2015, 02:41:30 pm »
well it seems like you already got a win,, if want to fine tune it even better,,  :)
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