Primitive Archer
Main Discussion Area => Bows => Topic started by: Weylin on May 20, 2018, 10:46:58 pm
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Bryce hooked me up with this really nice yew branch to make a hollow limb bow out of. It's perfect for the job. It has a very high crown and it will be the deepest hollow limb that I've done. It's slow going but I'm excited to see it come together.
(https://i.imgur.com/aqHdkNr.jpg) (https://i.imgur.com/R4sEA4V.jpg) (https://i.imgur.com/0uDtUNd.jpg)
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Will be following with interest!
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Yew is such a beautiful looking wood
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That looks great, so far! :OK
I really dig the intact ring of sapwood at the fades! I’m looking forward to see the finished bow!
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Very cool Weylin. I always enjoy learning from your work. I'll be watching this one closely.
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Oh this one will be sooooo pretty, would love to see more pics along the way! I have two similar high crown staves yew staves drying now for exactly the same purpose...
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Can you show more pics of the tool you are using to create the hollow limb profile?
Looking very good so far :)
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Like Leonwood said. That's gonna be a looker and I'm sure a shooter to. I would like to see more pictures as it progresses to
Bjrogg
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That's going to be one cool looking bow. Other than taking a craftsman to make, and lookin really cool, which are good enough reasons to make one, are there any physical advantages to the HLD?
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Hollow! I love you! Won't you tell me your name? -Jim Morrison, The Doors.
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Snicker snicker
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Thanks, guys. I will try to take some more pictures along the way.
Oh this one will be sooooo pretty, would love to see more pics along the way! I have two similar high crown staves yew staves drying now for exactly the same purpose...
Look forward to seeing what you come up with
Can you show more pics of the tool you are using to create the hollow limb profile?
Looking very good so far :)
It's just a curved chisel to rough out the bow and then a gooseneck scraper to do the tillering.
That's going to be one cool looking bow. Other than taking a craftsman to make, and lookin really cool, which are good enough reasons to make one, are there any physical advantages to the HLD?
It's a way of making a high crowned stave into an efficient bow. A bow with a high crown will have the stress concentrated along a narrow strip and have a lot of extra mass in the limbs that isn't doing work. by hollowing out the belly it removes the extra mass and redistributes the stress across the length of the limb.
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Does the depth of a groove taper towards tips with leaving same thickness between groove and back of the bow? How do you know how deep to carve this?
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@FilipT
You can use a little C-shaped gizmo with a pencil and a spring. You can adjust the pencil to the desired thickness and slide it along the limb with the pencil inside the hollowed out belly. The spring will give the pencil a little tolerance to mark different thicknesses without getting stuck. You then scrape away the marked areas until the pencil just won‘t touch them anymore, thus achieving the desired thickness all over the limb. I hope this is understandable ? :o
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Very, very interesting and beautiful
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Just waiting for updates on this staves progress......
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Does the depth of a groove taper towards tips with leaving same thickness between groove and back of the bow? How do you know how deep to carve this?
I just use my fingers to tell me if the thickness is right. I get a good sense of whether it is a consistent thickness all the way around and I can judge the thickness taper as well. This stave is going to be tricky in that regard because there is a fair amount of variation on the back that I will need to respond to. I'm working on getting it to first brace right now. It's slow going but I don't want to rush it.
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@FilipT
You can use a little C-shaped gizmo with a pencil and a spring. You can adjust the pencil to the desired thickness and slide it along the limb with the pencil inside the hollowed out belly. The spring will give the pencil a little tolerance to mark different thicknesses without getting stuck. You then scrape away the marked areas until the pencil just won‘t touch them anymore, thus achieving the desired thickness all over the limb. I hope this is understandable ? :o
-can you post a picture of the C-shaped Gizmo?
Weylin ~ Beautiful work as always.
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Fingers crossed Weylin, I am sure you will do a fine job.
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I've got the bow braced. Tiller is still a bit off and so is the string alignment. I did some more work after these photos and evened up the tiller and I have it pulling out to about #50 at 20" Gettin' there...
(https://i.imgur.com/dKFNExm.jpg) (https://i.imgur.com/JbmozlF.jpg) (https://i.imgur.com/bs39Ukk.jpg) (https://i.imgur.com/bKZMwpA.jpg)
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That’s awesome!! Definitely the best way to celebrate this piece of yew! Looks very much like this is going to be a shooter!
@Bob Barnes
Here’s a picture of the one Simon (from Stonehill Primitive Bows) uses:
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That is pretty strong bow at that draw weight for such a low mass bow. Do you think if the limbs were "full" that bow would be much worse, because of high crown?
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Oh my that is coming along nicely! That grain pops already so can't wait to see how that is going to look with some oil ;D