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Author Topic: Compression fracture on the back (now with pics)  (Read 2331 times)

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Offline Rākau

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Compression fracture on the back (now with pics)
« on: September 25, 2018, 01:56:17 pm »
So i was heat treating the belly of a stave of NZ beech because it has v bad compression resistance. And then for some unknown reason (i can get a tad impulsive at times, i was saying "dont do it, dont do it, dont do it" to myself over and over and then lo and behold it was done) i decided i should reflex the tips a little in my newly made caul. . . In the process i managed to get a chrysal on the back of the bow at the start of the bend which goes maybe a 3rd of the way accross the back. . . Bloody fool i know.

So what should i do.

A: tiller it out ignoring the chrysal and see how it goes?
B: sinew or some other patch in that area?
C: firewood?
« Last Edit: September 25, 2018, 07:18:54 pm by NZnuka »
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Offline upstatenybowyer

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Re: Compression fracture on the back
« Reply #1 on: September 25, 2018, 03:46:21 pm »
Pics!
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"Even as the archer loves the arrow that flies, so too he loves the bow that remains constant in his hands."

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Offline Pat B

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Re: Compression fracture on the back
« Reply #2 on: September 25, 2018, 04:37:24 pm »
pics!
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Rākau

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Re: Compression fracture on the back
« Reply #3 on: September 25, 2018, 07:18:30 pm »
haha sorry team I had pics on the way, quite hard to get photos to show on the very white wood but here we go. . .

this shows where in limb the chrysal is:
sketch-1537923192522 by Zachary Press, on Flickr

these three are the chrysal at different angles:
20180926_093716 by Zachary Press, on Flickr
20180926_093709 by Zachary Press, on Flickr
20180925_113243 by Zachary Press, on Flickr


the back is decrowned and about 1 3/4" wide at the chrysal point. limb design is 2" to midlimb, strait taper to 1/2" nocks. ttt is about 65" and will have a slight bend in the handle.
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Offline osage outlaw

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Re: Compression fracture on the back (now with pics)
« Reply #4 on: September 25, 2018, 08:49:50 pm »
I would not trust that bow. 
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I started out with nothin' and I still got most of it left

Offline Pat B

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Re: Compression fracture on the back (now with pics)
« Reply #5 on: September 25, 2018, 09:41:16 pm »
I wouldn't trust it either.
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Rākau

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Re: Compression fracture on the back (now with pics)
« Reply #6 on: September 26, 2018, 12:01:36 am »
Thanks guys, your knowledge is appreciated, haha firewood it is!
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Offline George Tsoukalas

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Re: Compression fracture on the back (now with pics)
« Reply #7 on: September 26, 2018, 06:38:28 am »
Looks like you forced it. 
I usually don't do any reflexing until I am done long string tillering.
That way the wood is thin enough.
I am not sure why you left the tips so thick.
But anyway...  it is toast.
Jawge
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Offline Pat B

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Re: Compression fracture on the back (now with pics)
« Reply #8 on: September 26, 2018, 07:45:12 am »
Save the good limb and handle. You may be able to splice another limb on it at a later date...or make an atlatl out of either limb.
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Rākau

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Re: Compression fracture on the back (now with pics)
« Reply #9 on: September 26, 2018, 03:31:20 pm »
Yeah i must definitly have forced it George, the other side bent just fine though. Tips are still thick cause it is just at floor tiller, i seem to thin them out later in the process.

Yeah thanks Pat, cutty cutty to stop me from just going for it anyway haha
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