Main Discussion Area > Bows
calculating poundage at X drawlength
bradsmith2010:
I do this weird thing where I dont even pull to target weight but under,,,till I get close to full draw,,I calculate where it will be,,so I havent pulled to full weight till I get to end of process,,
Aksel:
Thanks for replies. I suppose length of bow must also play a part in weight gain per inch, right?
2-3# per inch sounds reasonable and I think I am heading for about #50 in this case, but Iīm working on a bow which is 8 inches longer than I usually make so I find it slighter harder to assess..
Del the cat:
40/24 = 1.6667
multiply that by 28"
1.6667 x 28= 46.66
I've tried making this simple calculation more accurate by just using the actual draw (e.g draw minus brace) but it doesn't make much difference.
Simply draw length divided by draw weight gives a very usable approximation of pounds per inch that can then be extrapolated to any reasonable draw length.
Del
George Tsoukalas:
I think that procedure is pretty good, Aksel. I do something similar. That way there is much less stress on the bow. I roughly figure 3 inches per inch also. Jawge
Aksel:
Del, thatīs brilliant and it actually turned out pretty accurate in this case. The bow finished at 45 at 28 (it was #39 @ 24 to be precise). Then I piked it 1 inch on each end. Now at 48#.
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