Author Topic: Spine question  (Read 1992 times)

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Offline Mafort

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Spine question
« on: April 11, 2019, 02:39:02 pm »
Soo say I have a few split timber shafts that is like to make into compound shafts. Would this change the spine of them? I’m only hollowing the first 3 inches or so maybe less. If it does weaken then how high or low should I spine them to work with a bow?

Offline Pat B

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Re: Spine question
« Reply #1 on: April 11, 2019, 04:01:58 pm »
If it adds weight to the front end it will reduce the spine, by about 5# for every 25 grains added. Just adding a stiffer 3" to the front end shouldn't make much difference other than it's weight. Spine testers check the deflection in the center of the shaft.
Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC