stus calculator???

[karrow]

where is it??? i have heard lots about it just cant find it. sorry for the goofy question.

[Shawn Leonard]

Kevin, just experiment for yourself. Do a search on line and you will find it. Stu's calculator has most people I know who have used it, myself included over spined by at least 15#s ecsp. when recommending carbon. Shawn

[Outwest]

Try this.
 www.heilakka.com

John

[karrow]

thank you shawn. i read a post of yours the other day where you mentioned that you thought it had people over spined. i will do a search and experiment

[Outwest]

Sorry thats not it.
On my favorites it says that is where I got the calculator.

John

[rastaman]

http://heilakka.com/stumiller/

Download the instruction sheet also.

[Hoser1268]

I have used Stu's calculator for all of my bows and I have never had better arrow flight.  I have heard some have had trouble with it but I guess I'm just lucky.

[Night Wing]

Stu's calculator is a great "what if" virtual program. I've tuned my last 4 bows using his calculator. It always gives me a tunable arrow to start off with.

[xtrema312]

The comments about spine issues is with carbon. I have yet to see any issues raised with aluminum or wood. If I went 20# under spine with aluminum, I would have a wet noodle for an arrow.  I think the calculator is on when only looking at spine deflection number as they relate to other materials. However, from what I have seen, carbon reacts so fast it can have issues clearing the bow, and will not plane of line as much as other materials. So I believe the dynamic spine of carbon is different than the measured deflection spine.

[Hoser1268]

I am using carbon for all of my bows as of right now and like I said everything turned out great for me.  Especially since I like a EFOC arrow. My main arrow is coming in at 29%.

[cbCrow]

I use the calculator to look at scenario's and it has always got me real close to perfect!

[Friend]

**Speaking w/respect to carbon**

Have found Stu's calc to be a valueable tool for getting you in the ball park and for keeping track of my final set-ups.

My final set-ups typically end up from ten to 30 pounds below the recommended spines. The extreme upper range FOC's may even call for more than 30 pounds. These findings have been observed when achieving final tuning of my shafts tipped with a large dia. 3 BL BH; shot from both 3 yards and 25 yards. Actual observations utilizing BH's is always my final verification.

[hayslope]

Most folks just do not measure and weigh as precisely as this tool requires........remember "garbage in equals garbage out"?

The easiest way to find your calc output throwing a number at you that ends up overspined is to put your "best guess" in for center cut.

The next time you have the calc open, play with some of the input numbers....by + or - 5 or 10%.....and see what it does to your dynamic spine output.  Bottom line....weigh and measure everything.....twice!

[Shawn Leonard]

Agree that it is mostly carbons that the calculator has people overspined with, by alot! I mean 20-30#s overspined but a bit overspined on other materials too. xtrema312 is correct about carbons and their ability to recover from paradox. Shawn

[daveycrockett]

I may be wrong here. I just reread the instructions for use. It says spine must be entered at amo or 26" centers. It gives .825 to divide by to get this. The carbon I've been shooting is under by 15 lbs.But, when I do the conversion using the instructions it is perfect! The spine of my carbon goes from 92.7 to 112.36 using the conversion instructions. Is this right or wrong?

[JamesKerr]

Davey if you are using a shaft that the program recognizes than the conversion is not neccesary as the computer does it for you.

[daveycrockett]

That's what I thought but it don't. Run them as other and input the other spine in at 28" it matches with what is input to the arrow choices. It's not converted yet unless I"m missing something.

I have found that when pairing up wood shafts for the guys that some of the Bear and Howatt bows are way over classed.  The ten to fifteen under the recommendations apply when going for the Howatt Hunter especially.

[String Cutter]

Thank goodness. I thought I was the only one??? the Calculater does a great job on alum. for me but on carbons it  says my arrows are underspined by 22#'s. Even though I have them shooting like darts, bare shafted thru paper..  

[Night Wing]

I can definitely say the calculator does an excellent job with aluminum arrows.