wood to alum deflection charts?

[AkDan]

I have these charts at home however they can't be found by my gooder half.

I'm looking for deflections charts from wood to alum.  Is there any online?

there was also a way to convert spine to deflection and I can't for the life of me remember how.

I have a few spine conversions along, but need to find a few more.  trying to get my lil bro's longbow tuned up.   He's shooting good, his bh's aint!

Any help would be greatly appreciated.

Thanks
Dan in Mn

[AkDan]

I know someone has this stuff.....  It was at one time posted online and I was also given some to fill in the gaps where needed so it's nothing new or secret juju  :D .    

Should clarify, I'm looking for the deflection charts for alum to spine in pounds.   Want to see if there is anything near the shaft we are thinking he needs to be shooting.  Just in case it doesnt work.

[John Nail]

I believe Kelly's spine charts are still around someplace.
Shaft Size XX75 Spine Old GG or 24SRT Spine
1616  32#
1716  38#
1718  42#
1816  44#
1818  50#
1916 53# 55#
1918  60#
1920  65#
2016 61# 63#
2018 67# 70#
2020 77# 80#
2114 64#  
2115 70#  
2117 81# 83/84#
2216 84# 86#
2219 95# 98#

[fyrfyter43]

Originally posted by AkDan:
there was also a way to convert spine to deflection and I can't for the life of me remember how.

To convert spine to deflection, the formula is: 26/spine = deflection

To convert deflection to spine, its 26/deflection = spine

This is assuming that the arrow supports are 26" apart, and deflection is measured using a 2 lb. weight hung at the midpoint (13" from either end).

There is a chart at the bottom of this build-along.  http://www.jamesmhill.com/Spine_Tester.html

[Tim Fishell]

Here is the link to the spine chart here on TradGang.

 http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=2;t=000028

Hope this helps with what you are looking for.

[AkDan]

Thanks guys, thats exactly what I was looking for.

[AkDan]

Just an update now that I'm back home.

We got him flying perfect before I left.   Again thanks for the info.  Kinda stinks being so far away and not having access to my notes.....and starting to get to old to remember it