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For Experimenters - Determining Weak side of Shaft
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<blockquote data-quote="Super 91" data-source="post: 501195" data-attributes="member: 31217"><p>Fine testing and analysis. Seems your trial and error method is getting your some results, even if they were not what you were thinking to start with.</p><p></p><p>I am waiting on more TAC shafts to begin testing more myself. I have modified my RAM arrow tester to me more accurate and will be putting that to the test in the next couple of days when I pick up my parts. </p><p></p><p>Dorge has told me as well as others that a RAM tester or any spine tester will not work on the TAC shafts because the TAC shaft is tapered inside, making the spine different from front to back of the shaft. In other words, the spine for the first 1/4 of the shaft might be 80, then next 1/4 might be 100, then next 1/4 might be 120 and the tail end might be 140 spine. Put that on the spine tester and the machine might show you 140 each time, but only because you have the arrow suspended from 80 to 140. It will flex as much as the weakest spine, I would think.</p><p></p><p>It will still work to a certain degree, but not with the perfection you might get from testing a standard shaft. The bar clamp tester is a superb idea. But as you have mentioned, a high speed camera would tell all. </p><p></p><p>We may have to stand back and design a new type of spine tester to accommodate these new shafts with multiple spines. I think you are on the right track and I appreciate the work you are doing.</p></blockquote><p></p>
[QUOTE="Super 91, post: 501195, member: 31217"] Fine testing and analysis. Seems your trial and error method is getting your some results, even if they were not what you were thinking to start with. I am waiting on more TAC shafts to begin testing more myself. I have modified my RAM arrow tester to me more accurate and will be putting that to the test in the next couple of days when I pick up my parts. Dorge has told me as well as others that a RAM tester or any spine tester will not work on the TAC shafts because the TAC shaft is tapered inside, making the spine different from front to back of the shaft. In other words, the spine for the first 1/4 of the shaft might be 80, then next 1/4 might be 100, then next 1/4 might be 120 and the tail end might be 140 spine. Put that on the spine tester and the machine might show you 140 each time, but only because you have the arrow suspended from 80 to 140. It will flex as much as the weakest spine, I would think. It will still work to a certain degree, but not with the perfection you might get from testing a standard shaft. The bar clamp tester is a superb idea. But as you have mentioned, a high speed camera would tell all. We may have to stand back and design a new type of spine tester to accommodate these new shafts with multiple spines. I think you are on the right track and I appreciate the work you are doing. [/QUOTE]
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