Author Topic: $@!&$! Limb twist! (FD pg 2)  (Read 6090 times)

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Offline bubby

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Re: $@!&$! Limb twist!
« Reply #15 on: May 21, 2016, 04:56:57 pm »
Is the twist affecting the bow, string coming off or something?
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Offline George Tsoukalas

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Re: $@!&$! Limb twist!
« Reply #16 on: May 21, 2016, 05:18:03 pm »
Yes, it twists towards the weak side. Weak side is closest to the string. Jawge
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Offline bubbles

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Re: $@!&$! Limb twist!
« Reply #17 on: May 21, 2016, 05:52:38 pm »
Not yet, but I'm afraid it will in the next 5-6 inches. Or the limb will just twist off or something. 

I've taken the tip a bit to the left of center and that seems to help a bit. We'll see.

Offline BowEd

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Re: $@!&$! Limb twist!
« Reply #18 on: May 21, 2016, 11:47:40 pm »
Sorry I really did'nt realize that your bow was a backed bow.Thought it was a stave bow.Your alignment looks good on the last pic now.I will say this though.I had an extreme static that was throwing the string off at 20 to 22 inches on the tree.I fixed that by lining up the tips better with heat.It was a stave bow though.Good luck.
BowEd
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Offline crooketarrow

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Re: $@!&$! Limb twist!
« Reply #19 on: May 22, 2016, 11:09:37 am »
 I try deepening the knock (side needed). that may help some. Or unback it then fix my heating and bending the handle to where its needed.

  Short limbs narrow limbs, steep curves you'll always get twists. Or learn about alignment your tips and handles. All that built up pressure has to go somewhere.

 Try widening your limbs a 1/8 inch. If keep failing with alignment.
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Offline bubbles

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Re: $@!&$! Limb twist!
« Reply #20 on: May 22, 2016, 02:17:34 pm »
Allright, update, with gentle heating of the limb to correct alignment(even put it a bit past center on the other side) and deepening of the nocks to move the string over a bit, the situation seems to be improved.
A few important lessons I've learned:
1. Camera placement:  I've been placing my camera below the center line of the bow, and slightly behind the riser.  This led to a great straight on shot of my bottom limb but my top limb always looked like it was twisting, even when it wasn't. 
2. Recurve limb twist is best dealt with by tweaking  string  alignment, instead to trying to scrape the strong side of the limb (right?)

Here it is now, let me know how the tiller is looking. Its 60# at 22", going for 26.
« Last Edit: May 22, 2016, 03:05:04 pm by bubbles »

Offline PatM

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Re: $@!&$! Limb twist! (Tiller check)
« Reply #21 on: May 22, 2016, 03:02:33 pm »
Yes, but you mean scrape the strong side. ;)

Offline bubbles

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Re: $@!&$! Limb twist! (Tiller check)
« Reply #22 on: May 22, 2016, 03:04:19 pm »
Haha, yes. Let me fix that.

Offline DC

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Re: $@!&$! Limb twist! (Tiller check)
« Reply #23 on: May 22, 2016, 03:05:49 pm »
If you do that again can you tell me it's one frame of a video. I tried a bunch of times to get it to play ;D ;D ;D ;D ;D
I think there is a time and place for scraping to eliminate twist but with a recurve after a couple of battles like you've had it's heat and/or twist first for me from now on.

Offline PatM

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Re: $@!&$! Limb twist! (Tiller check)
« Reply #24 on: May 22, 2016, 03:22:00 pm »
Yeah, nobody wants a wedge shaped limb. If the wood is even and the limb is twisting because of internal differences in the wood it gets worse if you don't nip it on the bud and makes you think the wood is half as strong on one side.
 

Offline bubbles

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Re: $@!&$! Limb twist! (FD pg 2)
« Reply #25 on: May 26, 2016, 07:29:36 pm »
Here's the full draw.  Limb twist started creeping back as I removed some of the previously heat corrected belly, but some more gentle heat seemed to fix it right up. Here it is, 60#@25.  I've got a bit of weight to play with. What are the opinions on the tiller?(it's a screen shot, not a video )?

Offline wizardgoat

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Re: $@!&$! Limb twist! (FD pg 2)
« Reply #26 on: May 26, 2016, 08:44:14 pm »
Looks really good to my eyes. How does it shoot?

Offline bubbles

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Re: $@!&$! Limb twist! (FD pg 2)
« Reply #27 on: May 26, 2016, 09:17:02 pm »
I'll start shooting it tomorrow and report.   Need to shape the handle and make it a bit less square before arrows start flying.

Offline penderbender

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Re: $@!&$! Limb twist! (FD pg 2)
« Reply #28 on: May 27, 2016, 02:57:53 am »
Looks spot on to me! Great looking tiller!

Offline bubbles

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Re: $@!&$! Limb twist! (FD pg 2)
« Reply #29 on: May 27, 2016, 10:30:08 am »
Shooting pretty sweet. I'm liking it. 

I made a small dent in the belly on the top outer limb from a clamp (my leather pad was too small) when I was removing twist. Is this anything to be concerned about?
« Last Edit: May 27, 2016, 10:33:46 am by bubbles »