Primitive Archer
Main Discussion Area => Bows => Topic started by: Julian on April 18, 2018, 11:25:02 pm
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Here's part 1:
https://youtu.be/UnxPvbrndTM
At the moment, I've got the bow ready for floor tiller. I'm planning for it to come out around 40# at 26", and I'd like to try reflex the levers just a little bit. But I'm nervous about that, I think I need to make a caul. I'll also heat treat the belly. So much to do!
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Making a caul is a good idea, but I've done it just with a wide shim if I wanted a more angular, less rounded bend.
Like, get a "base" board and lay a 3/4" thick pine board on that. Place the bow back down and clamp or tie to both boards, with the lever hanging out over the end of the second board. Then, heat the transition area and base of the lever, pulling the tip of the lever with a weight or slowly tightening a cord to bring the tip down.
Good luck.
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I'd use a block like I've done in the past but I'm worried about cracking.
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Part 2!
https://www.youtube.com/watch?v=VRHttF11-K0
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Hey, wait!
I know you plan on reflexing the levers, but in the vid your bow went from dead straight, zero deflex to a visible amount all at once. Was that on purpose, like did you deflex with heat? Or, was that during floor tillering?
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Hey, wait!
I know you plan on reflexing the levers, but in the vid your bow went from dead straight, zero deflex to a visible amount all at once. Was that on purpose, like did you deflex with heat? Or, was that during floor tillering?
The bow is still straight; it's actually because of the fish-eye lens on the off-brand go-pro that I used to film.
I have a nicer camera but I haven't been able to figure out the auto focus on it as well, maybe I'll try again.
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Progress:
(https://i.imgur.com/FyOEBG1.jpg)
(https://i.imgur.com/a418KeW.jpg)
(https://i.imgur.com/u7HzJ1c.jpg)
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3/4 Brace:
(https://i.imgur.com/BlkzooU.jpg)
And here's a short video of the current bend:
https://youtu.be/vELAyoWpess
What are your thoughts?
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Bend looks good to me, has it taken any set? I would make those stiff tips thinner still -at least tapering out to the nocks... See how thin you can get away with :)
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Bend looks good to me, has it taken any set? I would make those stiff tips thinner still -at least tapering out to the nocks... See how thin you can get away with :)
Set so far is just over 1 1/2 "
btw, how do I correctly measure set?
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Heat treating should also mitigate some of the set, and I'm going to try to flip the tips a bit. Not sure how to go about that. I have a heat gun, but no caul or forms.
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I dont know why, I feel like the fades are just a bit steep, don’t know if I’m right though.
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measure tips original position before tillering begins. if stave was pipe straight to begin with pop the back against a wall and measure distance between back of handle and the wall or run a string between nocks in unbraced position and measure against the handle.
if you are at full draw with 1,5 set you have done a good job.
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I dont know why, I feel like the fades are just a bit steep, don’t know if I’m right though.
they are, I messed them up roughing out. I can't see much I can do about it now so I'm just hoping for the best.
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Heat treat time!
(https://imgur.com/a/CZEdpOv)
Here's the unbraced profile after tillering.
(https://i.imgur.com/JZhUtvd.jpg)
Here's my janky set-up.
Hope it works!
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I ended up with it holding just over 1 1/4" of overall reflex. Happy with that for my first attempt. Maybe I needed to soak it in the heat for longer to get more.
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Lost the reflex, and the set came back. oh well.
Here's 27"
(https://i.imgur.com/yiKjcbX.png)
it doesn't really seem right since I heat-treated, but I cant put my finger on it.
I'd love some help.
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I also made a short little video - mostly because I've been enjoying doing that.
https://youtu.be/aFPRCainyvI
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Set seems to be permanent, from what I read and I have not been able to steam it out with hickory.
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Set seems to be permanent, from what I read and I have not been able to steam it out with hickory.
Yeah, I'm learning that. I'd seen online that with white woods you could toast it out with dry heat. Anyway I'm happy with 1 1/2" set at full draw, I'm done tillering.
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Here's the last build video.
https://youtu.be/tpD1y748DWE
Next I'll shoot in the bow and see if it holds up. Curious to see how the recipient will like it.