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Author Topic: How much does arrow spine change if a shaft is shortened??  (Read 4681 times)

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Offline Ifrit617

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How much does arrow spine change if a shaft is shortened??
« on: April 06, 2012, 03:13:13 pm »
Hi guys,

I am curious to how much a shafts spine will change when shortened... I have a couple of cedar shafts which are spined 40-45# and are 32" long... How much would the spine change if I cut them down to say 25" for some short bow arrows? Any input would be great.

Thanks.

Jon
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Offline Pat B

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Re: How much does arrow spine change if a shaft is shortened??
« Reply #1 on: April 06, 2012, 03:49:17 pm »
Jon, the effective spine weight will increase by 5# per inch. The arrows are spined for a 28" arrow so the effective spine of them at 32" would be 20#-25#(5#x4"=20# reduction) Cutting them to 25" would increase the effective spine weight to 52# to 57#.  Having longer arrows doesn't hurt anything. Most of my arrows are cut to 29" to 30" for my 26" draw.
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Ifrit617

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Re: How much does arrow spine change if a shaft is shortened??
« Reply #2 on: April 06, 2012, 04:05:14 pm »
Okay thanks for the input pat... I figured around 5# an inch...

Jon
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