Spine Gurus,
If I were using a spine tester to show deflection on a 26" span, what should a 1916 shaft deflect using a #2 weight?
I have built a home made spine tester and I need a standard to check my accuracy. I have 1916s, 2016s, and 2117s.
Right now I'm getting .500 for a 1916 or roughly #52. I am not using any dials or swing arms, just a vertical drop-line pointed rod measuring against a 64ths measuring rule. I realize it is not precise, but so far I am pleased with my tests. I have a wood shaft that was spined at #52 by someone else. On my homemade spine tester it I got #52 also.
So far I have less than $5 in it.
If someone can direct me to an aluminum shaft chart using the 26" #2 method I'd appreciate it.
A real spine tester is on my long list of wishes.
Thanks.
1916-.623
2016-.531
2117-.407
Don't remember where I got this. I printed them out years ago.
These were at 28".
Hap
Thanks Hap, but I think that's based on the 28" #1.94 rule.
I hope someone who might have the shafts I listed, and a 26" spine tester, can measure them and give me some feedback so I can get me a baseline of reading this thing. If I can get closely similar readings I can then move to checking wood shafts with a little more confidence.
My check of that known #52 shaft was spot on, so I'm trying to double check.
Thank you Sir :)
Someone on here had a conversion no. Don't remember what it is. You might try a search.
Hap
From STU Miller on another site...
"Below are my number for Easton XX75 shafts measured with 2# on 26" centers....I think this is what you are looking for."
1416 1.386
1516 1.155
1616 0.883
1713 0.850
1716 0.726
1813 0.710
1816 0.619
1913 0.598
1914 0.542
1916 0.512
2013 0.495
2016 0.437
2018 0.384
2020 0.367
2113 0.437
2114 0.413
2115 0.380
2117 0.332
2213 0.380
2215 0.341
2216 0.309
2219 0.277
2312 0.351
2314 0.319
2315 0.279
2317 0.243
2413 0.299
2419 0.218
2514 0.249
2613 0.238
Yep. That's it!!
Thanks.
Can you PM a link from where you got that please?
Much appreciated.
Bud
Well Bud B looks like you did pretty good for 5 bucks according to coil springs chart, how bout a little more info. on that tester you made, sounds bout right for my back pocket.More room for arrows always feeling the need for a few mor.
Bud, PM Sent...
DP, What part of Killen are you from? :)
I live off brush creek road between hwy 43 and old hwy 47.
Scrap wood, perscription med bottle, coathanger, #9 lead shot - all free from other projects, reloading, and packratting.
I bought the two L brackets (can't remember price each) and the rule ($2.29 at Lowe's).
The lead in the bottle weighs exactly 2lb.
The rule has a slide on it and a fraction/decimal conversion chart on the flip side. I can adjust the rule at rest to be on an whole number. In the photo it was on 3" With the two # weight in place it is at 33/64ths, which converts to .515. So my first reading was off. My eyes are less accurate than the rule and wire pointer. I have a hole drilled at 13" so getting a good straight hanging pull is no problem. The wire hanger was made into a hook at the bottom, hooked near the top, and the top end ground to a nice heat treated purple pointed end.
Good enough for wood shafts, I'd say and my needs. Gotta keep the reading glasses nearby though
(http://i45.photobucket.com/albums/f94/Equismith/stuff727022.jpg)
(http://i45.photobucket.com/albums/f94/Equismith/stuff727021.jpg)
Blurry, but I think you can see the reading.
(http://i45.photobucket.com/albums/f94/Equismith/stuff727025.jpg)
QuoteOriginally posted by CoilSpring:
Bud, PM Sent... :)
Got it!! Thanks!
Thanks Bud I think I can handle that, probably got all I need laying around too.THANKS AGAIN
Here's a link to some charts that will make the conversions
http://www.rangersarchery.com/?q=chart
Include a digital caliper to measure the deflection instead of the "ruler". Easisest and cheapest and has a button to zero it.
Maybe later. But for my needs right now this is fine.
Double tapping again. Sorry