200 fps revisted
I feeling very confident right now that the 200 fps barrier with 10 grains of arrow weight at 28" of draw or less will be broken in a very short time from now, using Marks heat treating methos, my low...
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Tim, just for the record, I have never argued the mantra of no set at inner limb, little set at mid limb and narrow tips, I live by that, I do express it different when I say as narrow as possible,...
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Steve: Agreed: well designed, well tailored straight bows are so simple to make and as fast as all but the most extreme recurred or reflexed designs. Designs much, much harder to make and harder to...
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As much fun as a chrono bow contest is it still wont be conclusive, just mean someone had a better bow that day, but it is fun and if one or both of the bows happen to stand out for some reason it...
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Here is a theoretical comparison of short and standard draw similar bows.This started out as verification that the shorter draw bow has lower stress at full draw in spite of being thicker. I think it...
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Dave at 20" of draw your figures are pretty close, I am getting a peak at about 23" or 24". by 24" hystresis or what i feel like is a softening of the wood is well into play, Using very light arrows...
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Woodbear/Dave: Your posts are unusually valuable, and much appreciated by many here. It's like you're channeling Hickman. Please keep it up. One comment for the mathlexic among us. You leave half of...
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Dave, your modeling is some of the best i have seen, I am having trouble interpeting the colored lines and stress lines. Is there anyway to figure into a model the rate of wood breaking down or...
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SteveWhat is to much reflex, 2", 3", 4"? If I remember right Dan said he likes having about 3" of reflex in his bows.Marc
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Steve, I have been pondering the same thing about deflex. If wood does not "bend harder" as it bends farther, how much is reflex an advantage? The farther you bend wood the weaker it is in stiffness?...
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mark, you might be right, I was thinking it might be about 2" most likely varies with the wood, I am sure that sinewed bows could stand more reflex as the wood is a little tinner. Steve
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The amount of reflex itself is not the problem. Surface belly strain is the problem. Several techniques reduce surface strain:A, Making limbs wider/thinner. B, Perry Reflexing, which 1, puts belly...
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I think the issue is not so much it being a problem as much as when do you fail to see any more returns from it. The old point of deminishing returns logic, Steve
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SteveI believe sinewed bows need more reflex to get the sinew to do it's work.Marc
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There is no limit. You will never fail to see increased return with increased reflex as long as enough wood is made available to store the increased energy load--you can't pour two-gallons of water...
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The problem I have with excessive reflex gets bigger as the reflex goes up, at 1" or 2" of reflex stiff tips cant pretty well level out the force draw curve to where you can maintain the high early...
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Steve: Make a bow with a foot of reflex, the limbs curved as if at full elliptical draw in reverse. Assume that once tillered the bow material will maintain that degree of reflex when unbraced, that...
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SteveI have a bit of trouble understanding that one as well. Reflex should make no difference in string angle if the bow is tillered out the same as a bow with no reflex. Now it's true that adding...
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I can see where reflex can add to string tension at brace height and allow more predraw energy storage in the limbs. However, I think I can see where Steve is coming from due to his recent short draw...
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