Primitive Archer
Main Discussion Area => Bows => Topic started by: cutty on September 17, 2017, 08:22:34 am
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How many out there make the upper limb longer?
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I have before on a number of bows.They still shoot fine.Like the way it carries in the hand too being front heavy through brush etc.
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Generally I have arrow pass 1" above geometric centre which gives a slightly longer upper limb.
BUT... I made a bows with the lower limb actually longer by a couple of inches (I made it without any measuring) and it performed very so well that I've made others the same (Hazel primitive, wide flat limbs).
I don't think it makes much difference if it's well tillered.
Del
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I always have. I prefer how they balance perfectly on my middle finger while carrying and pointing, and a longer top limb helps facilitate dynamic limb balance much earlier in the draw, and throughout, than a symmetrical design.
How much, or if, the center is offset determines in large part how the bow balances in the hand as the draw is begun... due to basic geometry. Limb strength, properly adjusted relative to our holds(tiller) can help overcome that geometry discrepancy and achieve dynamic balance more and more as the draw progresses in such a bow, but the farther from center our string hand begins the draw, the more harshly the bow wants to tip in the bow hand, and the more we have to make up for it in some way, if in fact we seek true balance. I prefer to design my bows so that the string is pulled closer to bow center, so that it's better balanced when the first ounce of pressure is applied to the string. My goal is balance, from carrying, to the point I lay my fingers on the string, throughout the entire draw cycle... not just at full draw. Discriminating folks should try it. It brings a more refined feel to the bow.
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I've made them every which way but see no difference in balance or anything else.
Jawge
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what Jawge said,, )P(
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I usually lay out my stiff handle bow with same length limbs, but the arrow pass is about 1 to 1 1/2 inches above center, I move up and down the handle a bit with my grip until I fine the sweet spot and that is where the arrow pass will go. I guess you could say the top limb is shorter because of where I hold my hand, with the bottom limb tillered a little stiffer. :) I have made a few with the top limb longer but never really seen any difference as some say they do. ;)
Pappy
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Some folks don't notice it, some don't care, and that's good. Sometimes I wish I couldn't feel it either :o but unfortunately I often know I won't like a bow before I ever get it drawn.
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I look at a Yumi and figure there is quite a bit of leeway in all that stuff.
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I tried a longer top limb a few times but could not feel anything different compared to equal length limbs. I tiller the last two or three inches to full draw by looking at my reflexion and feeling how it shoots. When it looks even and there's no shock I call it done.
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Pat, that's a different animal. There are things going on in a Yumi that disqualify (or overqualify) it from a simple limb length discussion. And besides, if you watch them being shot in video, they're not all perfectly balanced/timed either.
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Pat, that's a different animal. There are things going on in a Yumi that disqualify (or overqualify) it from a simple limb length discussion. And besides, if you watch them being shot in video, they're not all perfectly balanced/timed either.
There is no simple limb length discussion then.