From: BobG
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Date: 05-Feb-17 |
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When you shoot a D bow that bends through the handle does the arrow pass true center of the bow or above like a laminated bow?
Thanks for your replys. BobG.
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From: Jim Davis
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Date: 05-Feb-17 |
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All depends on where you put your bow hand.
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From: Orion
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Date: 05-Feb-17 |
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Bowyers cut their arrow shelfs anywhere from 1 1/4 to 2 inches above the center of the bow. Arrow never passes through the center of the bow.
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From: Orion
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Date: 05-Feb-17 |
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Perhaps I should rephrase that because in a country the size of ours, one can find at least two examples of anything. To my knowledge, I don't know of a bowyer who positions the riser grip to have the arrow shoot through the center of the bow. Every self bow that I've seen ( and that's a lot) has positioned the arrow shelf above the center of the bow.
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From: bradsmith2010santafe
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Date: 05-Feb-17 |
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yes it can go to center, usually the bow balances a bit better for me with the arrow above center,, but a d bow can do either,,
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From: PEARL DRUMS
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Date: 06-Feb-17 |
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Arrow passes are quite often on center, especially if you build a lower limb 1-2" shorter than the top. No rules, just balance and tiller. That's just one bonus to building your own rigs. You can make them anyway you want, and then make a few more.
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From: George Tsoukalas
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Date: 06-Feb-17 |
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No rule but if the handle is bending I would not cut in a shelf. Jawge
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From: Michael Schwister
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Date: 06-Feb-17 |
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I build for the dynamic fulcrum point to be where the arrow passes the bow. For my 67" ntn bows the upper limb is 1 AND 6/10" longer.
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From: Stick Bender
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Date: 06-Feb-17 |
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On most bendy handle or rigid handle self bows there is usually a sweet spot & it depends on how much positive tiller is in your bow & it depends on how you shoot ,for me its usually 1 in to 1 1/2 above center I dont mark a index mark untill a bow is well shot in its never the same for every bow but as you exsperment you will defently find a spot that gives you the right arrow flight and smoothness but if you dont shoot off your knuckle and cut a shelf on a rigid handle bow your pretty much stuck with standard tunning.
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From: Jeff Durnell
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Date: 06-Feb-17 |
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No, I'm not stuck. Quite the opposite. I mark the exact spot my shelf will be from the onset and build, tiller, and balance limb strength and fulcrums with respect to it. Very predictable shooting characteristics that way, inherently tuned, and THAT is the same for every bow. Nock points are set where I predict as well. I don't 'experiment' for a sweet spot when it's done. I predetermine its location, build the bow around it, and FULLY expect it to be there when we're done.
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From: bradsmith2010santafe
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Date: 06-Feb-17 |
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yes that will work for sure,,, most of the bows I make,,,, as I shoot them in,, if it starts shooting really great I will stop there,,marking the spot that gets the best arrow flight, (because that it where the tiller is at that point) since I have had guys win state national and world shoots,, shooting my bows,, there seems to be more than one way to skin a cat,, right:) i dont llike building my bow to a predermined shelf,, I dont even like a shelf,,
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From: bradsmith2010santafe
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Date: 06-Feb-17 |
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also I will add ,,, having the flexibility to move the arrow rest up or down can indead reveal there is a sweet spot that is shooting a few fps better as the arrow is coming off the bow a bit better,, your bow might shoot great with a pre determined rest,, but it might shoot greater ,,,a little up or down and you would never know,,:)
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From: Stick Bender
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Date: 07-Feb-17 |
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Yes there is different ways to skin a cat but with natural material self bows they can change over time, this was something the original TBB authors exsperienced I had a osage bow I built last year that gained a addtional weight over a year ended up retillering a bit , same with a sinew /hickory bow I built it is pretty easy to see the difference in knocking points makes if you have access to a chronograph you can easely see the exact point where your arrow shoots best. With wood bows I never like to have a fixed knocking point, to each his own.
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From: Jeff Durnell
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Date: 07-Feb-17 |
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I don't carve shelves into wooden bows, I build up a rest with leather and put it where I designed the shelf to be for shooting in, then after the finish is dry, I put it back on with two-sided tape at that location. It could be moved in short order if needed, it just hasn't proven necessary.
The shelf is at the top of the handle, and the handle is placed in a spot coordinated with fulcrums and balance points. Then the bow is tillered so the limbs load equally and send the arrow straight away without porpoising. Moving the shelf or the nock point one way or the other would depart from the above considerations, move toward imbalance, and I doubt create a gain in velocity... but it sounds like something I could verify easy enough.
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From: Orion
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Date: 07-Feb-17 |
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Probably should have used the term "placed" rather than "cut" in my first response above because a lot of self bowyers don't cut arrow shelfs into the bow.
Most of the self-bowyers I know, myself included, build by initially positioning the handle in the center of the bow, even with bows intended to bend through the riser. Have to start somewhere. Then perhaps flipping it one way or the other to accommodate the natural tendencies of the wood/tiller, which usually results in the shelf/arrow pass two inches above the center of the bow. Granted, at this point, it's also possible to move the "shelf"/arrow pass up or down to change the tiller, or accommodate the existing tiller.
That could place the arrow pass directly through the center of the bow, but, I've seen no examples of it in my neck of the woods. Doing so results in sort of a Yumi bow with asymmetrical limbs (either right side up or upside down) as Runner points out. Possible, yes. Typical, I think not. Regardless, I shouldn't have been so definitive in my denial. I apologize.
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From: Jeff Durnell
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Date: 07-Feb-17 |
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Yep, a lot of people do it that way. Unfortunately, the way many folks tiller and flip symmetrical bows leaves little opportunity for the wood to reveal its natural tendencies, or for them to accommodate them.
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From: Stick Bender
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Date: 07-Feb-17 |
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This is a very interesting thread thanks for posting there is some very interesting insights into floating knock points /Arrow rest/Performance written by Steve Alley with testing 1000s of bows if any bodys interested with out chronographing the arrow its just a perception of good arrow flight thats why the chonagraph is a good truth detector.
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