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Author Topic: Experimental bow: Irish oak pyramid bow  (Read 5949 times)

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Offline Knotty

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Re: Experimental bow: Irish oak pyramid bow
« Reply #15 on: August 17, 2016, 06:07:26 pm »
If you could upload a couple pics of the delamination in the broken bow, maybe someone could comment on the reason it happened.

I learned that saving my broken bows makes me learn from looking back at them and not repeating the same mistakes.
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Offline FilipT

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Re: Experimental bow: Irish oak pyramid bow
« Reply #16 on: August 18, 2016, 06:44:47 am »
Here are pictures of the broken area. They are taken from the belly, back and sides.









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Offline SLIMBOB

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Re: Experimental bow: Irish oak pyramid bow
« Reply #17 on: August 18, 2016, 08:14:46 am »
Looks like a little dry rot to me.
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Offline FilipT

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Re: Experimental bow: Irish oak pyramid bow
« Reply #18 on: August 18, 2016, 09:22:40 am »
What is dry rot and how does it look like?
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Offline SLIMBOB

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Re: Experimental bow: Irish oak pyramid bow
« Reply #19 on: August 19, 2016, 08:26:21 am »
I believe it is caused by a fungus.  You mentioned some odd colors on the wood, and dry rot can sometimes be spotted by discolorations in the wood, I suppose it's a product of the fungus.  From a practical standpoint, the wood seems to dry out and loose it's elasticity.  It just gets Ritz Cracker like.  I'm only speculating from the pic, but that is what I would suspect.
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Offline FilipT

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Re: Experimental bow: Irish oak pyramid bow
« Reply #20 on: August 19, 2016, 11:16:48 am »
Discoloration was on the other limb that didn't broke at all. Could that bluish discoloration be indication of that fungus?
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Offline lebhuntfish

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Re: Experimental bow: Irish oak pyramid bow
« Reply #21 on: August 19, 2016, 11:47:34 am »
I had a piece a hickory do that once while I was floor tillering it.  Almost the exact same break.  The inside of the wood looked like it had crystals in it when I held it up to the light.  Withe the inspection from other Bowyer's and myself we came to the conclusion that it had been struck by lightning. 
I noticed while working on the stave that the wood did not act like normal hickory.  It kinda had a grainer feeling to it. 
I wouldn't dismiss the wood it's self just the stave.  I will definitely try it again.

Patrick
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Missouri, where all the best wood is! Well maybe not the straightest!

Building a bow has been the most rewarding, peaceful, and frustrating things I have ever made with my own two hands!

Offline steve.b

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Re: Experimental bow: Irish oak pyramid bow
« Reply #22 on: August 19, 2016, 12:19:41 pm »
If you saw purple staining, it was probably weakened by a fungal attack. It wouldn't have to be extremely week for a bow to fail. Imagine if it was just a streak that cut across the fibers on the back.
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Offline JW_Halverson

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Re: Experimental bow: Irish oak pyramid bow
« Reply #23 on: August 19, 2016, 12:40:42 pm »
Drat.  Was watching this thread with interest and had hopes for the bow. 
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Offline FilipT

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Re: Experimental bow: Irish oak pyramid bow
« Reply #24 on: August 19, 2016, 03:16:17 pm »
Patrick, as I said I took stave from wide board with full crown and bark. Would you recommend I inspect rest of the board and try again, or you thought about trying again with another board from irish oak?

JW, I was really angry when it exploded. As soon as I heard cracking, I knew its dead. Dreadful feeling.
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Offline lebhuntfish

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Re: Experimental bow: Irish oak pyramid bow
« Reply #25 on: August 19, 2016, 03:26:55 pm »
I would suggest trying again from a new board.  I wouldn't trust any of the board that the bow was cut from. 

Patrick
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Once an Eagle Scout, always an Eagle Scout!

Missouri, where all the best wood is! Well maybe not the straightest!

Building a bow has been the most rewarding, peaceful, and frustrating things I have ever made with my own two hands!

Offline FilipT

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Re: Experimental bow: Irish oak pyramid bow
« Reply #26 on: August 19, 2016, 04:08:21 pm »
I don't have any nice anymore. This was the healthiest board of all. Imagine then what others are, even though they all were stored in really good conditions.
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Offline JW_Halverson

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Re: Experimental bow: Irish oak pyramid bow
« Reply #27 on: August 19, 2016, 05:15:12 pm »
Quote from: Stalker on August 19, 2016, 04:08:21 pm
I don't have any nice anymore. This was the healthiest board of all. Imagine then what others are, even though they all were stored in really good conditions.

Well then, grab the worst of the bunch and have at it!  A pint of bitters and a bitter laugh for every one you break!
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Guns have triggers. Bicycles have wheels. Trees and bows have wooden limbs.

Offline FilipT

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Re: Experimental bow: Irish oak pyramid bow
« Reply #28 on: August 20, 2016, 07:27:47 am »
Back to saplings and staves again, and of course with them, at least month of drying (if I prepare them good).
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