Author Topic: Yellow Birch bow advice  (Read 5870 times)

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Offline Mountain Man1

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Yellow Birch bow advice
« on: May 23, 2019, 05:09:46 am »
Well, I have contracted the bow-itis haha. Just about done my first build and it has made an addict of me. Just wondering if anyone can clear a few things up for me, I have studied/researched extensively but have no experience to work with. She is a fine specimen of a yellow birch sapling taken near my driveway, about 1 3/8" to mid limb, 68" length.

First- had a sideways bend near the handle and straightened it with steam. It worked but in the process of pushing on the side she rolled and I ended up flexing it backwards. Heard it crack... :(
looked it all over and dug the cracked sections down with a rasp to get below the cracks and it seems to have worked. is this a viable fix or am I just prolonging the inevitable?

Second- had a large rollercoaster section in the top limb, also steamed out. Now I have a dent from the clamp on the bows back (I knew better but just wasn't thinking). I got it to rebound with a hot wet rag overnight but still a bit of a dent. Is this point likely to be a stress riser and pop a splinter?

Lastly- after fixing what I could I decided to test it. No point doing all the finish work if she's gonna explode right? Shot beautifully at about half- two thirds draw (scared to go farther until final tiller is done). Of course since I recently steamed the crap out of it, a lot of my rollercoaster has returned. Is it still too moist or is this likely to happen anyway? I plan on heat treating the belly, should I do that now and use that heat to fix my remaining warps or steam again and leave it longer before I finish it?

Sorry for the lengthy post but being my first I am a bit unsure of myself and since I now have a functional bow on my very first attempt I would really hate to screw it up this late in the game.
Thanks in advance for any advice you can provide.

Offline DC

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Re: Yellow Birch bow advice
« Reply #1 on: May 23, 2019, 07:03:17 am »
Was it dry before you did all this or still green?

Offline Mountain Man1

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Re: Yellow Birch bow advice
« Reply #2 on: May 23, 2019, 11:56:52 am »
It was dry. I had cut it in the fall, rough shaped and sealed the ends then left it in the basement until spring. About 5 months total on a shaped 3" sapling, should be as dry as it is going to get.

Offline DC

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Re: Yellow Birch bow advice
« Reply #3 on: May 23, 2019, 12:31:54 pm »
I've never worked Birch but I would steam it again and then heat treat it while it's still bent. This kinda locks in the bend somehow. Can you post pictures of where the crack was and the clamp dings?

Offline Woodely

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Re: Yellow Birch bow advice
« Reply #4 on: May 23, 2019, 01:52:12 pm »
I have worked with Birch in a cabinet shop,  its quite splintery and it lacks elasticity,  Knots present a weak spot with that wood big time.  I would run screaming and try some other wood.  Having said that maybe you can get a nice bow from it.
"Doing bad work is an exercise in futility, but honestly making mistakes is trying your best."

Offline Mountain Man1

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Re: Yellow Birch bow advice
« Reply #5 on: May 23, 2019, 01:54:08 pm »
I'm hoping to get pictures figured out today. Not much with computer stuff haha. Got a video of it shooting too not sure if can put that up or not. The birch is nice to work but should have got a better stave. Lot of twists and knots for a first attempt. I'll try the heat treat while it's still flat after a good steam, I was worried about the moisture from the steam causing cracks if I heated it. Any idea what thickness my limbs should roughly be on such a bow for 50# draw? Think I'm going to end up under weight by the time I smooth out the belly again.

Offline DC

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Re: Yellow Birch bow advice
« Reply #6 on: May 23, 2019, 03:28:22 pm »
You may get some lengthwise cracks. You can fill them with CA(super glue). It's the crosswise ones to worry about. I've had lengthwise cracks open up while heating and then close up when the wood cooled, never to be seen again. Couldn't even find them to put CA in.

Offline Mountain Man1

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Re: Yellow Birch bow advice
« Reply #7 on: May 25, 2019, 05:37:01 am »
I've got images loaded to imgur. How do I get them on here?

Offline Mountain Man1

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Re: Yellow Birch bow advice
« Reply #8 on: May 25, 2019, 06:20:41 am »
So imgur was a bust. Kept getting errors. Can I get photos on here from my google photos app?

Offline Swampman

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Re: Yellow Birch bow advice
« Reply #9 on: May 25, 2019, 06:55:37 am »
With imgur you can select bbcode and then copy the link.  Paste the link in your post and you should be good to go.  That is what I do.

Offline paulc

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Re: Yellow Birch bow advice
« Reply #10 on: May 25, 2019, 07:00:25 am »
I use the pixlar app on my droid phone to reduce pic sizes. And on my desktop I use old-school Paint program that comes w every windows computer to my knowledge.

Fwiw, Paul

Offline Mountain Man1

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Re: Yellow Birch bow advice
« Reply #11 on: May 25, 2019, 05:48:57 pm »
There!! Finally got pictures working, I think... let me know if the link doesnt work and I'll try and figure out where I went wrong.
https://photos.app.goo.gl/HvGCWzWKWvCBF3w56

Offline DC

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Re: Yellow Birch bow advice
« Reply #12 on: May 26, 2019, 07:45:24 am »
Nope, the link get's me to Alicia's page and then it wants me to log in.

Offline Mountain Man1

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Re: Yellow Birch bow advice
« Reply #13 on: May 26, 2019, 03:41:16 pm »
Crap,I'll have to another way

Offline Mountain Man1

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Re: Yellow Birch bow advice
« Reply #14 on: June 02, 2019, 10:35:49 am »
https://flic.kr/p/2g7rbLq
Try this link, hopefully I've got this picture thing figured out