Stu Miller 3-15-2010 Dynamic Spine Calculator
Stu has just released an updated version of the Dynamic Spine Calculator 3-15-2010.
There are now more shafts available and strand counts for Fast Flight Strings.
You may download the new revised version and directions at http://www.heilakka.com/stumiller/
There are some cosmetic bugs if using Open Office but these will not affect calculations.
Please note the following windows of the calculator are dropdown menus, By clicking on them a down arrow will appear allowing you to make your selections
1. Arrow Shaft Size - allows selection of various shafts and OTHER if shaft not found
2. Footing – yes or no
3. Feathers – select 3" 4" 5" or vanes
4. Strike Plate - allows for both positive and negative calibration from center cut of bow
5. String Material – B50 or Fast Flight (strand count of 06 – 16)
I would like to thank Stu for his time and effort. I have found the calculator a very helpful tool.
If you have any problems with webpage downloads contact me through the forum.
Les Heilakka
ttt
Quote "I would like to thank Stu for his time and effort. I have found the calculator a very helpful tool."
I agree......
Thank you
thank you
rusty
I just downloaded the revision and I'm going to start playing with it now. Thanks Stu!
I hope it works better than the last one....it was waaaaaaaaaaaaaay off for me.
Thank you Stu. I have used your calculator as well and found it to be very helpful.
karim
Thanks again Stu for all your work!
(remember, GIGO :eek: )
For an archery enthusiast, the greatest thing since sliced bread. :clapper:
Thanks this has been very helpful in lessening my learning curve and more $ in my wallet!
QuoteOriginally posted by Biggie Hoffman:
...it was waaaaaaaaaaaaaay off for me.
Does that mean it will work for the rest of us then? :-)
QuoteOriginally posted by lt-m-grow:
QuoteOriginally posted by Biggie Hoffman:
...it was waaaaaaaaaaaaaay off for me.
Does that mean it will work for the rest of us then? :-) [/b]
Yes. :D
I always have to run 5-7# week, but after yet another little form adjustment I am now closing the gap.
You are all very welcome......I appreciate the all kind words!
-Stu
Thanks STU; this has saved me many dollars and I appreciate it it greatly.
Less money on arrow experiments = more money for bows and hunting.
Perfect !!!!!!!!!!!!!!
DD
Works great for me. The only thing I wonder about is why GT 35/55 which the GoldTip site says is a 500 spine does not result in the same output as any other shaft that's designated 500. Makes me wonder if Stu goes above and beyond by actually measuring the spine of the arrows he's got listed and the 35/55's are actually a bit weaker than they state. I don't have a spine tester so don't know for sure. Anybody actually do a spine test on these?
skarcher,
I can't remember now how much but my 35/55 GTs are weaker than my 3R Traditional 500s. I'll check them tonight and post the results if no one else has covered it by then.
I found GT 35/55 to be weaker than my Beman 500's. That as pre-calculator. Stu did measure them or someone did anyway.
Thanks Stu! It's helped me wrap my brain around this stuff. Question though, 3Rivers sells a FF string with 18 strands. Are you going to add this? Or is it not much a factor?
The difference between each increase of two strands is either negative 1.4 or 1.5 as you increase the bundles.
Seems to me if you used an 18 strand FF figure for 16 and subtract 1.4 or 1.5 from the total.
skarcher,
arrows of the same static spine change in dynamic spine due to differences in outside diameter and grains per inch. you can see the exact differences if you input an arrows info manually in the "other" arrow catagory.
What would 5.5" feathers add to the equation?
difference per inch is .4 so half that .2 is my guess