Primitive Archer
Main Discussion Area => Bows => Topic started by: Halfbow on October 25, 2018, 05:55:04 pm
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My first time posting a bow here! This bow was the result of a very long process that involved more failed attempts than I bothered to count. But I finally got one.
The limbs are bamboo with the outside of the culm facing the belly. The handle is osage, and the siyahs are jatoba. It's backed with silk.
I'm not sure how ya'll would measure a bow like this, but following the curves along belly with a flexible tape measure (but bypassing the bulge of the handle) it's 60" long ntn. Strung it's 54" in a straight line between nocks. And the string is 56" when it's in a straight line. The limbs are 1 3/4" at the widest point near the handle and taper to 1" at the siyahs. The siyahs continue tapering down to 1/4".
45# at 28 inches.
The let off during the draw is very noticeable. At the beginning of the draw it feels like you're drawing a bow of a much higher draw weight. By the time you get to full draw, it feels quite easy. So this bow must be storing a lot of energy for its poundage.
This bow is whisper quiet, and has no noticeable vibration. In fact it has less vibration than several long bows I've made (which I think weren't bad themselves). That's not what I expected and I'm not sure why it would be. I will chalk it up to luck.
Unfortunately I don't have any arrows that are spined at all well for it. They fish tail noticeably.
(https://i.imgur.com/Vk69Hjb.jpg)
The string wraps are because a splinter lifted through the silk near the handle on the top limb. I glued it down, glued some flax fiber over it, wrapped that in more flax fiber, wrapped it with hemp string, then wrapped the other limb too for looks. As far as I can tell, it's holding fine after several hundred shots.
(https://i.imgur.com/wUBbLBY.jpg)
(https://i.imgur.com/NDTO7Vz.jpg)
(https://i.imgur.com/ZdkGOXe.jpg)
(https://i.imgur.com/RVI9MJ1.jpg)
(https://i.imgur.com/OBMScg6.jpg)
The limbs are held on the handle by some jatoba inlayed in to the sides.
(https://i.imgur.com/rsAVsol.jpg)
The siyahs are likewise held on by some osage.
(https://i.imgur.com/MN2Z8Vf.jpg)
The glue joint between the limbs and the handle was tricky, as the bamboo was irregularly curved. I got the handle to fit the limb as well as I reasonably could, then I used some cloth impregnated with epoxy in the joint to take care of any imperfections.
(https://i.imgur.com/FxoOG5I.jpg)
Used some ratty bamboo, as I had broken all my good bamboo in earlier attempts. ><
(https://i.imgur.com/0MZ9xgk.jpg)
String guide
(https://i.imgur.com/Fg2rsOA.jpg)
Bottle cap for scale
(https://i.imgur.com/kmQtUcs.jpg)
Paper thin osage at a 90 degree angle to reinforce the nocks.
(https://i.imgur.com/hBIhQHW.jpg)
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Cool bow! I love a bamboo bow. Just finished one myself. That’s a lot of different woods laminated in there. It looks great though. Keep up the good work.
Tattoo Dave
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Way cool man. Not something you see everyday, that's for sure. Keep um comin'! )P(
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Good job on that one, held the profile beautifully.
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That is a beautiful bow. What Asiatic Style bow is it?
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Well, if this is your first bow-post, what will come up next?
That is a lot of work, turned out to a beautiful bow and bent.
Good job!
Bttw
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That's absolutely beautiful man!
We've discussed the tiny one I'm building, and I'm going to be too ashamed to post a picture after this!
I love those inlays instead of wrapping the siyahs. When I copy you (badly) can we just chalk it up to imitation being the sincerest form of flattery? ;)
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Lovely bow :)
Del
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Got to admire that patience, accuracy and the love for details. theese wood-joints are just fantastic. thanx for showing!!! cheers
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Interesting combination of materials, had to have taken a lot of planning. Attractive and original!
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Awesome work. Unbelievable details in that bow. Well done.
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WOW! That is a really cool bow - nicely done!
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Agree with simk.
your craftmanship is very pleasing to look at.
one of the best bows ive seen in a while as far as im concerened.hope you show more of your talent.
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Very nice work!! SS
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I could only imagine how much work was involved in making this bow. Excellent craftsmanship.
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Well that’s something different. Cool post, cool bow.
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What a beautifully made bow! That really is unbelievably cool, like the others have said, the woodwork is outstanding!
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Beautiful well crafted bow!
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Wow thanks guys! I'm pretty much the only bowyer I know, so it didn't really occur to me how gratifying it would be to show people who actually know the craft. Feels good.
What Asiatic Style bow is it?
It's the result of a wide variety of inspiration mixed with some of my own ideas, so it's pretty different from any actual Asiatic bow. If I had to choose one, the overall profile probably most resembles some manchu bows.
We've discussed the tiny one I'm building, and I'm going to be too ashamed to post a picture after this!
I love those inlays instead of wrapping the siyahs. When I copy you (badly) can we just chalk it up to imitation being the sincerest form of flattery? ;)
Haha I will be flattered. By all means use what you want. Though I recommend making sure your bow works with some tight temporary wraps before bothering with inlays.
Got to admire that patience, accuracy and the love for details. theese wood-joints are just fantastic. thanx for showing!!! cheers
Thank you! Your interest in it is what inspired me to get off my butt and take pics and post.
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Nice work
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That is pretty awesome work, looks like a jigsaw puzzle with so many pieces ;D Great craftmanship! Did you heat treat the belly lam?
Only thing I don’t get is why you would back bamboo with silk. Bamboo is the best backing I know and will not fail even on a short bow like this.
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Leonwood, no belly lam really. The working limbs are just one piece of bamboo and silk. I did heat treat the belly. Because the inside of the culm is the back of the bow, I trusted it less. Especially since I tillered from the back. I also figured a backing might help the limbs stay on the handle, since they're not v-spiced or anything.
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Nice work halfbow. Expecting to see more from you in the future.
Bjrogg
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Great looking bow. I'm really interested in that style. Awesome work.
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Very good looking bow.
Can I ask, on the photographs there seems to be raised nodes on the back and the belly. Have you shaped the culm to match the belly?
I like the way that you have joined the limbs to the riser section, there is an explosive bow blogger who uses a similar technique, although a more pronounced wedge.
Image not my bow.
(https://redhawk55.files.wordpress.com/2014/06/bigbrother-braced-handle-25062014.jpg)
I have thought about using a joint similar to a bow tie inlay on a ipe/bamboo experiment. Something similar to this.
(http://www.twistedrootswood.com/uploads/8/2/5/2/82522704/p1080089.jpg?362)
If you make another one like this I would really love to see a build along.
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DaveMac, yes! You have found one of my inspirations. I saw that pic a long time ago and have been unable to find it again. But I guess it stuck in my head.
A bow tie inlay sounds good. I'm sure it will be more than strong enough for any reasonable use.
The bumps on the back are the result of me trying to follow the fibers in the bamboo. As you can see from this scrap piece, they bump out on the inside too.
(https://i.imgur.com/fwTNvH4.jpg)
No growth rings to follow, so I looked at the sides of the limb like this and followed that best I could. You can also tell by looking at the texture of the bamboo on the back. In areas where the fibers are cut there will be a bunch of dots, and in areas where the surface is more parallel to the fibers, the dots will elongate in to lines. Tillering from the back became an exercise in getting the tiller right while still following the fibers reasonably well. I learned from experience that bad things happen if I just flatten it.
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Thanks your reply. I see what you mean (nice photo to illustrate).
I guess Dave Mead is another one of your inspirations... Did you try it with the bamboo with the rind as the back?
I'm assuming that flattening the culm would be OK if it was the belly.
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Ah as I understand now you used one piece of bamboo and the outside of the bamboo pole is the belly of your bow! Then tillering from the back... now the silk makes sence to me ;D
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I guess Dave Mead is another one of your inspirations... Did you try it with the bamboo with the rind as the back?
I'm assuming that flattening the culm would be OK if it was the belly.
He has been an influence for sure. I have tried the bamboo both ways. All the bows have been quite different in dimensions, profile, and draw weight, so I don't have any good science on the matter. Too many variables. But just from my impressions, I don't see any great performance benefits from doing it the way I did it here, with the outside of the pole as the belly of the bow. Bamboo works well both ways. At least with the moso bamboo I use. The Bhutanese do it that way, but perhaps their bamboo is different. The only difference I notice is the extra trouble while making the thing.
And yes, flattening the inside of the pole is fine when it's the belly.
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That's a beautiful bow and amazing joinery, well done. The handle design and limb attachment scares me a bit though. Have you done many the same? It would sure free me up to make skinnier handles if they've lasted for you :) :)
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DC, This is the first bow I've made with this inlay attachment method. I'm very pleased with it. I've shot this bow a lot and the attachment points show no signs of trouble. Both the limbs and the siyahs are on there good, no movement in any of the glue joints, all rock solid. As for the thinness of the handle.. it would take far more muscle than I have in my body to break that osage. I don't even begin to worry about that. If this bow breaks, I'm certain it will be somewhere mid limb.
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Thanks, my next handle may be skinnier ;)