Main Discussion Area > Bows
short bow brace height
Woodbear:
Regarding brace height, for selfbows, I generally design the bow for a brace height that is close to 10% of the bow length. I measure both the brace height and draw length from the bow back, for convenience in determining the active length of draw. This gives a strain at brace height that is about 40% of the strain at full draw. It is generally enough that string slap on the wrist is not bad (i.e. I do not notice it). Perhaps this is just an appearance thing, it just "looks right".
It does bring up the question of tuning the bow for arrow flight. If you made the bow for a particular brace height, is there still room to "tune" for arrow flight?
Your draw weight and distance numbers look odd to me: you have a brace at 5"(0#), 30# at 22", and 50# at 24". That is 30# in ~17"(1.8#per inch), and then another 20# in the last 2 "(10# per inch). I can see why you might release at a particular weight (by feel) rather than at a particular draw length. So long as you can be consistent, it seems like a legitimate way to shoot a short bow.
Dave
feral:
thanks all.
It does release by itself at 22 inches. So I will go with that.
bassman211:
Just recently I made a series of 4 50 inch Osage bows. In the 35 to 40 lb range. All have some reflex. First 3 are ok though I had to patch 1 that lifted a splinter behind a knot on the bows back. The 4th one was a clean piece of Osage that was a nice bow until I tried adding more reflex with a form, and belly heat treat after I had it tillered nice at 23 inches with no reflex, but no set either.. I put to much reflex in it, and right at 23 inches it blew on the top limb. It was the nicest stave of all of them. I just pushed it to far.
BrokenArrow:
I do about 4 to 4 1/2 brace for all my short bows that are 41 to 44 inches in length
Mo_coon-catcher:
About 10% of the nock to nock length is a good starting point for brace. From there you can work up and down as needed.
Kyle
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