Primitive Archer
Main Discussion Area => Bows => Topic started by: Tyke on August 06, 2014, 08:53:31 pm
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Just finished tillering osage bow it came out 38#@30" and i want 45 will making it a recurve add weight
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Short answer: yes.
Longer answer: we need more info to make a good assessment whether recurving the bow is the correct measure to increase draw weight. Other options include, but are not limited to, heat treatment, reflexing, shortening the bow, adding a backing and starting a new bow.
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Yes. If it doesn't break it, or cause it to take a lot of set which offsets some of the gain, but yes you can add some weight. Design would be the key question here in my mind before answering whether you SHOULD add reflex.
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I've already heat treated after floor tillering to straighten the stave about I could take off about 2 to 3 inches off each end thanks for the advice
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Ill try them all except the backing thanks darksoul
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Before you cut anything give us some details about the bow and some pics because some of those options may not be best for your bow.
Grady
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Here is a photo of it. Osage, bendy handle. I'll leave the rest to Tyke.
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Doesn't look like the handle is bending much to me.... :-\
DBar
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Nope, My bad. From memory it is 72 TTT, and he was wanting to put an arrow shelf in after the tiller and knocks are complete. I also believe it is flat.
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Yes is not a bendy and i did put a shelf
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You could gain 5 to 10# from heat treating the belly and flipping the tips. The tiller looks pretty good.
Grady
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Can we see an unbraced profile pic and a back profile pic.
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Is you draw really 30 inches,if not you can cut it way down and flip the tips and gain lots of weight. What is you draw length ?
Pappy
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The best way to add weight is to start another bow and keep the draw weight higher. Adding weight is a real tail chaser, Ive tried enough to know.
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I am going over after work today to get some better photos. His camera is a bit messed up. Pappy, Tyke is about 6'4, so he really does have a 30 inch draw.
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I agree with PD. Start another. Jawge
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In that case,30 inch draw,yes I would also just start another. :)
Pappy
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You two old farts told me that 10 times before it sank in. Sure you can flip or recurve tips and add temporary weight, but the added stress takes about 60-70% away after 500 shots or so. You simply cant add wood and more wood means more draw weight.
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You are here on PA to learn how to build wood bows. On this one you came in under weight so get another stave and see what you learned. ;) You can make a purse out of a pigs ear but is that what you want?
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Tyke, I agree with what the other old timers are saying. That looks like a nice 38# bow. I'd leave it and move on to the next one. You'll find that is the perfect weight for anyone just starting out and there will be plenty of people around to shoot it when you get your heavier bows built. I have a few of them on my rack for friends to shoot and learn on.
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if the bow is long enough,, cutting some length,, is a positive option,, adding sinew will also bring weight as well,,,
but as stated above need a little more info
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I would not add sinew to a 72" bow, if anything I would heat treat the belly good and hope for the best.
Grady
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A light heat treating, recurves and sinew on the working portion will easily do the job.
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This is a first time builder. I think some folks are going to confuse him with suggestions of sinew backing, heat treating and bending recurves. IMO he should learn how to tiller properly and how to hit the draw weight he's shooting for before going on to "bow building 201".
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This isn't his "First" bow. A few weeks back he completed a 72 inch ttt Osage flat bow, it is 50# at 30. The lingo is there, just not the backing knowledge. He did recurve his tips on the last one. He had to heat bend an almost U shape out of one of the limbs of this one. He also heated in some reflex into this one.
http://www.primitivearcher.com/smf/index.php/topic,47429.msg647942.html#msg647942 .
That is the post of the first Osage build.
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LOL, PD. :)
No doubt about the old and the fart part.
I'm looking at a BL stave thinking the recliner sounds better now.
I spent sooo much time trying to increase draw weight years ago in the last century that it finally sunk in too.
As far as piking goes, 1 inch off each end will get ya 5#ish and more set. But at least it will be fun pulling a 5# heavier bow and getting the same cast. :)
Jawge
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well ok,, I agree with pretty much all the advice,,,and only know what I know,,
but increasing weight on a bow is not that complicated,,
there are times when a bow is overbuilt,, that reducing the length ,,decreases the mass so that the bow actually shoots harder even if tillerd to the same weight,,,,not always ,, but sometimes,,,,, and as stated,, you can increase weight,, and the bow will take more set and off set the increase in weight,, but thats how we learn,,, if the bow is 72 inches long,,, and a low draw weight,,,there is some room to fine tune,, without having to build a new bow,,,, that being said,, ,, building new bow is good experience as well,,,
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That's true, Brad. Fine tuning is always good to learn. Jawge
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Just got back from his house. He Piked 3 inches off of each end. Roughly 55 at 27. It is for his nephew anyhow (he thought he wrote that), who is about 5'5 and 15 years old or so. Still looks good.
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Thanks for all the advice ill post pics of my nephew shooting it hopefully he dosent grow anymore and it will be fine
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Glad it worked out,looking forward to seeing it all finished up and him shooting it. :) :)
Pappy