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Calculate draw weight?

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Aksel:
Pat, I am making a replica of a stone age bow so I donīt know what weight I am aiming for...! Thatīs one of the things I am looking to find out, aswell the full draw profile. I am following the measurements with a caliper and doing a bit evening out of the tiller as I am working my way to full draw.

Badger:
Put a very long string on the bow so it hangs loose to about 24" and see what it weighs at that point. That will give you a fair idea.

Del the cat:
45# divided by 13.5" gives you the pounds per inch. Multiply that by the draw length you want gives a good approximation.
So 45/13.5 = 3.33 multiply by 27  gives 90#
Del

willie:

--- Quote from: Aksel on March 02, 2025, 05:08:53 am ---Pat, I am making a replica of a stone age bow so I donīt know what weight I am aiming for...! Thatīs one of the things I am looking to find out, .

--- End quote ---

if you share more specs about length and width and species and something about the handle, and anything about arrow length of historical era which might  help set a target draw  length.....

you might get some good estimates of reasonable draw weights to tiller for.

sleek:
If I know the surface area of the bows working limb, and what wood, or the specific gravity of the wood, I can tell you what the draw weight can be with minimal set, depending on tiller.

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