Primitive Archer
Main Discussion Area => Bows => Flight Bows => Topic started by: PatM on December 07, 2015, 08:57:14 pm
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Here's an Elm shortie that I'm working on. Roughed out and ready for heat-treating and then sinew. Don't worry, I don't believe sinew has to dry for years. ;)
(http://i399.photobucket.com/albums/pp78/pat_05/IMG_0169_zpsvzx2am1a.jpg)
(http://i399.photobucket.com/albums/pp78/pat_05/IMG_0172_zpsf9afyesn.jpg)
(http://i399.photobucket.com/albums/pp78/pat_05/IMG_0168_zps08qlyom0.jpg)
(http://i399.photobucket.com/albums/pp78/pat_05/IMG_0166_zpsv2rego5k.jpg)
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Ha,ha, trying a retro- flight- design. Me too, did the same design recently: 43" in length, red yew( no sapwood), but no backing, actually 40lbs at 19". I want to end up at 23"/45- 48lbs.
Promising!
Michael
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Oooh, lookin' good :).
I've got a sort of plan in my head for a Hickory backed hickory Molle'.
Basically a cookie cutter job from some thickish Hickory backing that I've got. I'll heat treat the bit that's going to be the belly and glue it up with reflexed levers, then glue on lever belly reinforcements.
It's at the armchair stage at the mo' ::)
Del
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Wow PatM nice looking hook........cant wait to see this one finished up.
DBar
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Wow those are some tight curves
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Looking forward to seeing this one finished.
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I am excited to follow this. It sure has the right look!
Alan
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Heat treated.
(http://i399.photobucket.com/albums/pp78/pat_05/IMG_0178_zpsq2lpomcz.jpg)
(http://i399.photobucket.com/albums/pp78/pat_05/IMG_0179_zpse2q4h3ku.jpg)
(http://i399.photobucket.com/albums/pp78/pat_05/IMG_0180_zpso0u4smvk.jpg)
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Looking good Pat
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Very promising, super clean stave, heattreated the limbs? Recurves are steambent?
Michael
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Looking very good
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Oh ya !
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One problem I have had with that style is maintaing the profile through tillering and shooting in. It really is critical for top performance. Light arrow flight bows suffer the effects of hysterias much more than heavier bows and even small amounts of set add hysterias. If you can get it out to 23" without taking set it should be a strong shooter.
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Looking great! I have simple way to calculate how fast sinew dry - total thickness in mm sguared - results in weeks. For example 3 mm of sinew dry in warm and dry conditions about 9 weeks , I check this with very sensitive scale few times and it works good for me
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I agree Lukasz - this rule of thumb is dead right.
I also agree with Badger,I've made quite a few like this and without deflexing the fades you will likely lose a fair bit of that shape. I feel that once the wood starts to break down you are fighting losing battle for a good flight bow. I've found it better top add the deflex for less net reflex but you keep more of what you start with and more importantly the wood isn't breraking down.
Good luck - it will be nteresting to hear what distances you get with it.
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I agree Lukasz - this rule of thumb is dead right.
I also agree with Badger,I've made quite a few like this and without deflexing the fades you will likely lose a fair bit of that shape. I feel that once the wood starts to break down you are fighting losing battle for a good flight bow. I've found it better top add the deflex for less net reflex but you keep more of what you start with and more importantly the wood isn't breraking down.
Good luck - it will be nteresting to hear what distances you get with it.
Maybe so but none of the 500 plus yard wood/sinew bows from the past appear to have been deflexed in any way.
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Hey PatM,
Have you braced that sucker yet. Bet it's tough to string..... ;D
DBar
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I have to confess that I don't have enough sinew at the moment to proceed. :(
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Ok you'll see ;)
I've made a few like this from elm and was just relaying my experience. I hope you manage to keep this profile. How many of these old bows were made from elm?
500 yds is a good challenge.
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The point is that nobody is coming close with ANY wood.
Remember back in the day only Osage and Yew actually worked for bows. ;)
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Pat, to be fair to the current generation of flight archers we are playing by slightly different rules. The elevated rests and vanes they were using make a huge difference in distance. I agree that holding the profile is critical, if the wood can stand up to it and the tillering is good he will have a good bow. It is a well proven design. I have built several bows that have a capablitiy of 500 yards, it is really not that big of a trick. Getting the arrow out clean and keeping it straight is the big trick.
I had one las year I was practing with, not a flight bow just a run of the mill osage abow about 66" long. I got an arrow out very close to 400 yards because the flight was so clean. It just so happens that the string didn't line up very well on this bow and the arrow was about 1 1/2" to the right of the handle, there was a huge jump in the distances when elevated rests and fortisan fletches started being used.
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Steve, can you explain about the elevated rests?
Thx
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An elevated rest is collapseable. Feathers, long hair, brushes etc would all fall into the elevated rest category. I am in favor of allowing any natural material for a rest in the all wood division, changes are hard out of respect for past record holders. I don't see it that way, I believe if a rule is unduly holding back distances it should be changed and the sooner the better but thats just me and I respect the other opinions as well.
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If you want some sinew Pat just let me know, I have plenty
P.S. I agree completely Steve
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Thanks. I appreciate that. I'll pm my addy.
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Challenging project here to say the least.Good so far.I'll be watching.I've got a bit of extra elk leg sinew too if you need it.
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Thanks for using objects in your images to provide scale perspective. Good luck!
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So, PatM, what was the outcome? I didn't get to see the pictures, so if you have some, i would be delighted to see.
Its an interesting design!
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looks great... it will be fun to watch this one for sure.
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It should make a solid flight bow, I don't have any real practical experience with sinew outside of making a handful of them. I never really did any testing to speak of. I think a good portion of the draw weight on this type of bow needs to come from the sinew, it won't be so critical that the belly holds up if it has less responsibility. Almost impossible to over work the sinew.