Main Discussion Area > Arrows
spine tester
boo:
Sounds about to me. Im sure there is a way you can do it where you use either the same weight with an adjustable scale or the same scale with a different weight. I just think it would be easier to use the same weight and scale with adjustable arrow legs and different marks on the scale per length. The simplest spine tester ive made is two nails in the wall and a weight with marks marked on the wall for different spine deflection. Not as accurate, but works better than doing it by hand.
Swamp Bow:
One weight system = less stuff to loose. ;) I might make a simple tester like yours, just to get in the ball park when sorting shafts.
Swamp
CraigMBeckett:
Swamp Bow.
I would use 1 weight, one indicator scale and make up a table for different lengths if different lengths is the way you want to go. The beauty of the GNAS system is its simplicity, single table fits all, all you are interested in is weight of bow and arrow spine at your draw length. The US AMO system was designed for arrow manufacturers and is used primarily to compare shafts with each other.
Craig.
Swamp Bow:
Thanks Craig.
Swamp
Pat B:
Google James Hill spine tester. It will show you how to make a spine tester and he has the conversion table there too.
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