Primitive Archer
Main Discussion Area => Bows => Topic started by: Don W on June 07, 2021, 05:11:40 pm
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It's my first time working with Osage. 69" ttt. 1 3/4" wide at the widest. This came to me as a 3x4 rough sawn chunk. It's my first time chasing a ring, and it was old and dry. I think I got it right, but I backed it with rawhide just in case.
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Don, the tiller looks great! Nicely done. Jawge
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Well that was obviously an attempt at a humble-brag when you asked for a tiller check!
You know darned good and well that is a fantastic job and the bow looks amazing! Killer tiller.
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Looks really good. Should be a nice shooter.
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Really sweet!
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nice work!
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Looks great to me also. Good job.
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Excellent eliptical bend on your stick.You did good.How does it shoot?Hope you get ahold of more osage.
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:OK What everyone else said! 8)
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So, I am a novice bowyer with zero completed osage bows, but it really sounds like an overbuilt design and looks like the outer top limb is a little stiff to my admittedly inexperienced eye.
Is that length and width plus rawhide not going to lead to a fairly sluggish bow? I have about half a dozen staves from various osage sources that I've been studying and trying to plan out builds for.
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First off, note he said quartersawn. That means he started with a board, and edge grain at that. Rawhide is an incredibly sensible choice for backing and the weight of thin rawhide backing adds only a few grams of weight out on the tips and the difference in speed from the arrows would be maybe a loss of 1-2 fps, which is still going to be significantly faster than the most efficiently designed and executed broken bow.
Secondly, I see nothing concerning about the tiller, nothing that would keep me up at night, much less cause me to break out a micrometer to try to quantify.
As for worshipping the Gods of Speed, unless you are seriously considering a trip to the Bonneville Salt Flats for the International Flight Shoot, it's really just academic. EVERYTHING in making bows and arrows is a long series of tradeoffs. High efficiency/high-speed bows are generally short-lived and break at the worst possible time, as per Murphy and his law. I'll trade off that speed for longer limbed bows that seem to be more accurate and sweeter shooting.
Now settle on a design and start making woodchips, and be sure to post pics of progress as you go. We are all about seeing what others are making!
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Nice bow. Looks like a bit of reflex in the top limb that might make it appear stiff when it's not. I wish you years of service from it.
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Thank you for the effort in that post, JW_Halverson.
I didn't mean any offense. Don said he chased a ring, so the grain violation in the board should just be radial violations (which, from what I understand, the rawhide also helps protect against failures from).
I've only just started making bows in February and broken several, had a few successes, stacked dozens of staves, and haven't worn any bows out yet.
I'll introduce myself and my progress to the forum properly sometime after I get back home from my current adventure where I can take pictures. I may get some whittling done on the stave I brought with me in the meantime.
Thank you rps3. None of the pictures are perfectly from the side and I was having trouble figuring out what I wasn't seeing there.
It's a good looking bow. I'm just trying to learn.
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The Chrono results
(https://www.diy.timetestedtools.net/wp-content/uploads/2021/06/Screenshot_20210611-170502.png)
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BetterTrees.....It looks like there might be a little propeller in the top limb to make it look that way.No big deal.
What is the poundage and draw length on your osage bow Don?Not bad speed for the maple for shooting an over 11 grain + arrow from it.
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I must have posted that after the second Bourbon! The Osage is 45#@28"
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When using a chronograph to measure bullet speeds, averages are the best indicator of what is happening because there are variations in how the powder loads and super tiny variations can yield different speeds.
But when I measure arrow speeds off a bow (assuming fairly closely matched arrow weights), I tend to dismiss all but the top arrow speeds because the variation comes more from differences in draw and release. I put my confidence in the top arrow speeds because the bow cannot exceed that speed and thus consider that the actual measure of what truly is happening when an arrow is shot....so long as I can do my job with a good, smooth release.
Your top speeds have you shooting around 147 fps from a 45 lb bow. Most folks consider draw weight plus 100 to be a benchmark for a good shooting bow (45+100) when shooting a 10 grains per pound of draw weight bow. Your fat arrows are coming in at 11.3 grains per pound, so it is an easy assumption to say that a 450 grain arrow would spit out a fair bit faster. Nothing sluggish about this bow. You got yourself a bow I'd confidently carry to hunt big game!
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I agree. I typically only use 1 arrow. (Gives me extra exercise) and adds to the consistency. I can tell a difference how I release and arrow speed. I try to check speed the same way I shoot, but I draw and hold typically, which reduces speed a bit. Once in a while I throw in a quicker release, but it's still not a snap shot, I don't want to put an arrow through my new Chrono
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(https://www.diy.timetestedtools.net/wp-content/uploads/2021/06/Osage-Flat-bow-6-21-6-final.jpg)
(https://www.diy.timetestedtools.net/wp-content/uploads/2021/06/Osage-Flat-bow-6-21-4-final.jpg)
(https://www.diy.timetestedtools.net/wp-content/uploads/2021/06/Osage-Flat-bow-6-21-5-final.jpg)
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Don your bows have improved dramatically.. you are really cranking them out... tiller looks good.. only thing I can comment on is osage doesn't need to be that wide , it can handle 1 1/4 if need be and still hit 70 lbs... gut
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Don your bows have improved dramatically.. you are really cranking them out... tiller looks good.. only thing I can comment on is osage doesn't need to be that wide , it can handle 1 1/4 if need be and still hit 70 lbs... gut
Thanks. I made this one narrower. http://www.primitivearcher.com/smf/index.php/topic,70190.msg986403.html#msg986403
That pretty much depletes my osage stash!!