Primitive Archer
Main Discussion Area => Bows => Topic started by: Stixnstones on January 26, 2016, 06:06:04 pm
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Yep, this just happened... Yeeeeh!😡
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Ah $#*+...what were the specs on the dearly departed?
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Sorry for your loss, stix!
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Ew man that stinks. But it sure was looking good in the first 2 pics!
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Bummer, looked nice
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She was 60" ttt pullin 53#@ 27". Put about 100 arras thru it.
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Yikes. Was it the bottom limb? I did look nice. I would not have expected that.
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Let's see some close ups of the failure
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I feel your pain ! !
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Ouch! Was it a knot or pin in the back where it broke.
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Zero knots, really clean stave. Heres full draw before make up
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Here's the break
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Clean stave, good tiller... Can't see why that one would fail. It made a great looks my bow for that 100 arrows.
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Did it let go at a heat corrected spot??
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Appears to have failed in tension. Osage wont do that often, might not have been healthy.
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Did it let go at a heat corrected spot??
Ditto...looks a little toasted on the side and the back.
A heartbreaking loss, she was a beauty!
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That was a spot that got a lil heat correction. A lil more heat than i wanted, is that the culprit?
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Oh man, that's a bummer......and such a fine looking bow. The tiller looks great.
(http://i1169.photobucket.com/albums/r509/drewsumrell/image_zpsgozofsj9.jpeg) (http://s1169.photobucket.com/user/drewsumrell/media/image_zpsgozofsj9.jpeg.html)
It was hurting my neck turning up side down ;-)
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I thought the same thing on the heat - if the back got hot during the correction, it could have contributed to the break. Sure was a nice looking bow.
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maybe a combo of the heat correction and relative humidity where the bow was,, maybe after the heat treating it never went back to a healthy moisture content,, of course nothing like that has ever happened to me :)
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How long after heat did you bend it. I had that happen after one day of heating it, fine before next day it broke, right wherw i heated it. It got too dry and brittle to bend. Needed to wait a few days to gwt moisture back up.
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I've learned to always let a stik sit for a couple or few days after heat or steam. This one hurts cuz i went real slow, watched my p's and q's and it was my last piece of yeller wood... Bummer. If u aint breakin u aint makin, onward and upward 🏹
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I would say the heat did you in and maybe it got tired of being pulled 27". That was a shame.
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Any brown on the back side is dangerous, looks like your brace height might have been a tad high. It seemed to hold its reflex well and the tiller looked good. I think the scorching did you in.
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Ah man! that sucks, bro. That was a nice looking bow. That finish work looks like something I'd put on a bow, so, I approve! ;D Keep at it!
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I've had some Osage delaminate where I did heavy heat. What was the ratio between early and late?
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Only went a couple under sapwood
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That was a beautiful bow, it's a shame it broke on you. But don't be too discouraged, just learn from what you did from that bow and apply it to the next. Experience is a brutal teacher, but the lessons you learn from it sure do stick!
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That really sucks. I feel your pain, I broke a beauty last week that I tried to get a little closer to center. It was perfectly fine I should have left it alone. 20/20 hindsight.I just used dry heat to line one up yesterday guess I'll be giving it a few days. I don't need to see another go. If it does I don't think I'll be making anymore dry heat corrections.
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Sorry for your loss. That sure was a beautiful bow.
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That's a shame. Really nice bow!
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I feel like this is a portal view into my future, minus the beautiful bow at the beginning
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Your design (long flipped tips and about 3" of net reflex) put a lot of strain on the back, so a small irregularity, or even a small change in equilibrium MC, could trigger a tension failure.
Heat-treating wood leads to a permanent lower equilibrium MC of the wood. Since wood becomes stronger in compression at lower MC, whereas tension strength peaks around 12% (and decreases at both lower and higher MC), toasting the back makes it considerably weaker. See p. 4-35 in the Wood Handbook. http://www.fpl.fs.fed.us/documnts/fplgtr/fpl_gtr190.pdf
As Badger pointed out, the side and back did get a bit of toasting, giving a weak spot on the back. So I second his opinion that the toasting seems to be the culprit.
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That was a good looking bow. Sorry.
To me, that break looks like a bow just pulled too far (27" at 58" ntn).
So I think Joachim is right on.
Jawge
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as George says...58" , recurves, fairly long handle section, fairly long draw, you need everything perfect to pull that off, its expecting a lot from the wood......got very close tho , well done for that
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When I was at Twin Oaks Pappy gave my a hop hornbeam stave. I had never used the type of cawls they had there and I scorched the back of the bow a little, it blew right at the scorch mark on my first full draw. Another issue I saw here was a high brace height, on such a short bow with so much reflex that aslo added a bit of stress.
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Damn shame, but holy cow man, good work otherwise, that thing was beautiful. Make another!
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I don't know if the formula is right ,, but I read,, increasing the brace 1 inch,, is like drawing the bow 2 more inches,,or puts that much more strain on the bow,, I have seen the question here why the Native bows seem to be braced so low in pictures,, I think that has alot to do with it,, they didn't want to overstrain the bow with a high brace :)
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Its a shame when they break, I probably broke more bows than you built. :) Broke one in the last 4 so I'm doing good.
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thats a shame, was a nice bow.on the plus side....you can always build another one....
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That sucks bud, always hate to see one that made it that far wind up in two pieces.
When you done your heat corrections, did you by chance use any oil on the wood? I find that dry heat by itself does things to Osage I really don't like unless I heat treat it. I can say that I've discolored the sides and the back slightly without any issues at all. But I always use oil to bend any bow wood.
Patrick
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Yeah Patrick i did use oil . Seems like a perfect storm of charred back, pulling to far and a lil extreme design that i'm not able to pull off... Yet.
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I know what you mean, it does kinda sound like a perfect storm.
Probably still be together if it was a knarly piece of Osage. I have a belief that the knarly stuff is stronger. Because it had to be to hold together when it was growing.
I can't wait to see your next one though!
Patrick
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Sorry for your loss.
Looking at the braced pic: it was the right limb, right?
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Kinda makes me sick at my stomach when I look at the pics of the two pieces. I always have trouble getting rid of the leftovers. I usually hang them on the wall for a while and stare at them while I beat myself up. Then, I start a new one and try to get lost in the new piece of wood. You build a beautiful bow. I can't wait to see your next one.
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make a new limb and do a take down,,,, :)