Main Discussion Area > Bows
Looking for a 400 yard shot
sleek:
--- Quote from: RyanY on June 10, 2025, 11:50:31 pm ---Great update Kevin! Looks awesome.
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Thanks Ryan! Just trying to beat the bow you built years ago that won the contest for longest draw for its overall bow length! Haha.
willie:
I think if the crossection wants to cup, there is nothing you can do to prevent it, but consider a flat back that cups creating high edges. those edges will have a bit more tension than the middle of the back, so if the back is crowned some any cupping might not raise the edge enough to cause trouble.
or just plan around the cupping effect.
sleek:
--- Quote from: willie on May 14, 2025, 06:14:46 pm ---
--- Quote from: sleek on May 13, 2025, 10:58:40 pm ---If you build a 64 inch version of the bows I make, and pull it to 35 inches, you will absolutely blow way past 264. Arrow shafts will be your hardest part.
--- End quote ---
can we see the unbraced side view of that design? sounds radical.
--- End quote ---
It didnt turn out as radical as I would have liked. Its split lengthwise in several spots while tillering which prevented me from applying the heat treat process I typically do. Its kept some reflex but none of the extra ai put into it. I blame the wood being likely too damp and not heat treated enough to hold the shape. It should have held the inch I put in it, it already had 1 inch naturally.
The reduced reflex is hurting my string tension and early draw weight. So, I dont expect much from this bow. But I will finish it and test it, trying again on a new stave.
Hopefully I'll figure out how to stop it from splitting.
sleek:
--- Quote from: willie on June 11, 2025, 03:09:14 am ---I think if the crossection wants to cup, there is nothing you can do to prevent it, but consider a flat back that cups creating high edges. those edges will have a bit more tension than the middle of the back, so if the back is crowned some any cupping might not raise the edge enough to cause trouble.
or just plan around the cupping effect.
--- End quote ---
Not bad ideas. This seems to be the only hurdle I have to test this design, so I'll give that a try too.
mmattockx:
--- Quote from: sleek on June 11, 2025, 12:01:24 am ---Another more simple idea is to remove the crown completely so its flat as a board on both sides. That may reduce the tendency for cupping as well.
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Flat rectangular cross sections cup very noticeably, so I doubt that will solve your problem. I think a slightly crowned back will give you the least amount of cupping, but that is just a gut feeling.
Mark
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