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Adams spine tester question

Started by Tyler C. Moore, November 29, 2016, 12:44:00 PM

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Tyler C. Moore

November 29, 2016, 12:44:00 PM
I have a vintage Adams spine tester. It used a 2lb. weight, and is marked as 26" measurement. im confused, should I adjust it to 28", or is the 2lb weight specific to 26" testing... Any help would be greatly appreciated
Tyler C. Moore

wapiti

#1
November 29, 2016, 01:55:00 PM
The 2# weight is specific for a 26" span. This was the AMO standard set up for measuring arrow deflection for wood arrows. AMO standards were the result of AMADA (Archery Manufcters and Dealer Association). Today ATA has a modified standard for measuring arrow spine deflection for carbons and aluminum. It is measured at 28" span and a 1.94# weight. There are charts and various formulas to convert these from one to another. I have a spine tester by Oak Creek Archery which shows AMO in pounds and ATA in measured deflection. Had an Adams but "upgraded" because of the spine scale on the newer one. Works the same as an Adams.
"Diplomacy is the art of saying 'Nice doggie' until you can find a rock."-Will Rogers

#2
November 29, 2016, 01:56:00 PM
2# is for 26"

1.94# is for 28"

Bisch

Fletcher

#3
November 29, 2016, 03:20:00 PM
The 2 lb weight is used with 26" centers.  The spine reading applies to a 28" BOP arrow.

IMO, we would all be better off measuring spine in deflection in thousandths of an inch, but most of us aren't going to change at this point in our life.
Good judgement comes from experience.  Experience comes from bad judgement.

"The next best thing to playing and winning is playing and losing."

"An archer doesn't have to be a bowhunter, but a bowhunter should be an archer."

#4
November 29, 2016, 04:23:00 PM
QuoteOriginally posted by Fletcher:
IMO, we would all be better off measuring spine in deflection in thousandths of an inch, but most of us aren't going to change at this point in our life.
I totally agree! 1/1000th of an inch is so much more precise!!!!!

Bisch

Tyler C. Moore

#5
November 29, 2016, 05:33:00 PM
You guys rock, thanks...
Tyler C. Moore
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