Author Topic: Broke Bow  (Read 7579 times)

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Offline bowman_137

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Re: Broke Bow
« Reply #15 on: December 07, 2011, 06:59:20 pm »
Here's a different view. And a appreciate all the advice, the more the better off ill be. like i said this is my first bow and i didn't expect to get it perfect the first time. thats why i join PA because i knew i would get constructive criticism and learn how to do it right
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Offline Ifrit617

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Re: Broke Bow
« Reply #16 on: December 07, 2011, 08:22:44 pm »
Is your handle glued on or just held on with the cord? It appears like the handle is to narrow and is bending to much, hence the splinter. On the next one make the bow longer, work on smoothing out your fade transitions, make your handle slightly beefier, and go slow. Good Luck!

Jon

Offline Eric Krewson

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Re: Broke Bow
« Reply #17 on: December 08, 2011, 10:53:24 am »
If that is the crack on the left side of your fade out in the last picture, it is not a fatal crack.

Looks like your handle isn't glued on. Take your handle off, soak the crack with super glue, clamp it closed until the super glue dries, glue, not wrap, a new handle piece on but extend it further down your limb and feather it into your limb with no abrupt angles.

I like to glue a couple very thin pieces on first when I replace a handle. These will flex with the limbs and won't pop the glue joint loose.

As the final part of the fix you can glue a thin strip on the back of your handle the same length as the belly piece to make a crack sandwich.   

Broken bow recovery is a great learning tool.

Here is how you should feather your handle into the limbs, no abrupt angles.


Offline Buckeye Guy

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Re: Broke Bow
« Reply #18 on: December 08, 2011, 11:37:52 am »
Eric
That was kinda my thoughts also !
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Offline bowman_137

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Re: Broke Bow
« Reply #19 on: December 12, 2011, 10:18:13 am »
yes i just wrapped the leather strip around the handle pretty tight. what glue should i use to glue the handle down iv tryed several different kinds and they just break loose? I'm sure some of that is because this bow needs more work and it has too many weak points. Also what tool did you use to feather the handle down like that?
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Offline Eric Krewson

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Re: Broke Bow
« Reply #20 on: December 12, 2011, 10:39:03 am »
Handles break loose when you have too much bending in the fade out area or too abrupt an angle where you handle meets the limb.

I use Urac 185 for all my bow making but titebond should hold OK.

I feathered the handle into the limbs with a rasp, followed by a course file and finished up the transition with an orbital palm sander.

Offline George Tsoukalas

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Re: Broke Bow
« Reply #21 on: December 12, 2011, 10:39:23 am »
All of the above contributed. The big ting is the fade area. The tapering needs to extend into the board itself. Jawge
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Offline Shaun

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Re: Broke Bow
« Reply #22 on: December 12, 2011, 10:45:20 am »
The is no fade, your bow is bending over an edge at the handle to limb point - just like putting a piece of wood in a vise and pulling back on it, or breaking a stick over your knee for a campfire. There will be much more stress right at this point. If you took the handle off and made a leather built-up handle that was soft, you may be able to super glue the crack and keep shooting. Good work making a bow and shooting it!

With the second picture I see your handle is narrowed. Repair it like Erik mentioned as you will need handle thickness so it does not break in this narrow area. The fade is the transition from handle to limb and is an area under extreme stress. Feathered transition instead of a hard point to bend across.
« Last Edit: December 12, 2011, 10:49:17 am by Shaun »

Offline bowman_137

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Re: Broke Bow
« Reply #23 on: December 12, 2011, 01:22:39 pm »
Titebond is the last glue i tryed and it worked the best but I need to feather out the fades alot more i guess. So on my next bow would i benefit from not narrowing the handle?
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Offline mullet

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Re: Broke Bow
« Reply #24 on: December 12, 2011, 11:24:20 pm »
I think if you unwrap that handle and follow all the good advice you got that you can still get a good bow out of this one. Like Eric said repairing a bow is a good learning experiance and you will have enough people to walk you through it.
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Offline bowman_137

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Re: Broke Bow
« Reply #25 on: December 13, 2011, 12:37:34 pm »
Ok well thanks for all of the help! ill post more pics when i get further along with it or break it again, which ever comes first.
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Offline Eric Krewson

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Re: Broke Bow
« Reply #26 on: December 14, 2011, 11:06:24 am »
A little more on feathering a fade. I shape this area before I start tillering so I have some extra wood  to work with. I mark my 4" handle section before I start reducing wood in the fade and work the slope down to just above the limb's belly but stay off the belly.

It is real easy to dish out the transition area where the fade meets the limb if you are not careful so go real lightly with you tools. A dished out transition zone means a hing or much lower poundage bow than you planned by the time you straighten your goof-up out.

mikekeswick

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Re: Broke Bow
« Reply #27 on: December 14, 2011, 05:57:22 pm »
As said above glue on two thin ( 1/8th) laminations on inbetween the riser you have and the limb. Let the whole lot dry properly then try and blend handle to limb just like in the above picture.

Offline Del the cat

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Re: Broke Bow
« Reply #28 on: December 15, 2011, 08:24:47 am »
It's sort of been said already, but I'm not sured it has been explained too clearly.
Sorry if I'm just covering the same ground.
Looking at the bow from the front or back it suddenly goes narrow for the grip.... fine
Looking at the bow from the side, the grip should slowly build up the thickness... but it must get thicker BEFORE the linb narrows for the grip.
If the narrowing from the side corresponds with the start of the thickening you have a sudden concentration off stress.
So as you come along the limb from the tip, it must gradually start to thicken and then start to narrow.... don't do both suddendly at exactly the same point.
Del
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Offline nativenoobowyer86

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Re: Broke Bow
« Reply #29 on: December 15, 2011, 12:49:13 pm »
Looks like you found a decent board :) nice straight lines :D
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