double shaft spine?

eric-thor · June 23, 2010, 03:44:00 PM

anybody have an idea what a 2514 filled with a 2216 would spine out to . im looking for a log for a log thrower 100+ lb bow.

Old York · June 23, 2010, 04:27:00 PM

I'm coming up with 187 pounds static spine, now that's provided the shafts have practically an interference fit, i.o.w., t-i-g-h-t!

eric-thor · June 23, 2010, 04:33:00 PM

they r a nice vacume forming fit not to tight to force in or out but a better fit than the 2117 for sure. wow thats alot of spine !!!!did u actually put the combination on a spine tester or use some form of ccalculation?

Raging Water · June 23, 2010, 05:00:00 PM

Eric,

I am really interested in the answers.

But, why do I think this post is about me? LOL

eric-thor · June 23, 2010, 05:01:00 PM

eric-thor · June 23, 2010, 05:02:00 PM

im putting something together for my friend...

but dont tell anyone its a secret.

WESTBROOK · June 23, 2010, 06:27:00 PM

A 2219, 29", 125g pt has a dynamic spine of #107.5

A 2419 has a dynamic spine of #140.9

Eric

lpcjon2 · June 23, 2010, 07:13:00 PM

Save yourself time and just use a piece of re-bar.

eric-thor · June 23, 2010, 09:52:00 PM

ok thanks

Lucas K · June 23, 2010, 11:47:00 PM

Easton used to make a 2440 shaft, that would be close to what you are describing

Looper · June 24, 2010, 03:46:00 AM

If you use a 30" gt7595, a 8" sleeve of 2216, a 300 grain point, and a 200 grain insert, you come out with an arrow that spines around 125# and weighs around 950gr. You could adjust the spine up or down by changing the length of the sleeve.

I guess it wouldn't be too hard to create a 200 grain insert.

The FOC would be around 29%.