WOOD ARROW SPINE TESTINGS ?

[SAVIOUR68]

I HAVE A HOMEMADE STYLE JIM HILL SPINE TESTER TO MEASURE A 26" SHAFT AT 13" CENTER. QUESTION IS IF USING A 10" REAR TAPERED WOOD SHAFT DO YOU STILL MEASURE AT THE 13 CENTER OR DOES IT HAVE TO BE MEASURED AT THE END OF THE 10" TAPER TO GET A PROPER SPINE READING ?
         :confused:

[camodadd]

I dont have the scientific answer but, I would say spine with the taper included since it is gonna come out of the bow that way. The experts should chime in before long.
Scott

[JO_EZ]

I just built a set of tapered arrows for my son. My tester has a 26" span. I put the nock end of the arrow right on one support and, basically measured the last 26" of the arrow.

I don't think it matters too much as long as you do each arrow in the batch the same way. Consistency is what matters.

I started with the shafts slightly stiff according to Stu Millers calculations. Then I fletched half of them.  I'd shoot a couple of groups and sand the arrows, testing the spine every time, until at 7 yards I was getting a both bare shafts and fletched shafts to hit in one group. When I sanded and tested, I made sure that each arrow spined within one or 2 pounds with the index of the nock pointing up (just another consistency thing). When I put the nocks on I tried to line the stiff side up with the index.

Last night we took them out and shot them at longer ranges and the arrows were right on, just needed a little brace height and nock point adjustments and we were all set.

This was the first set of arrows I have made actually using the spine tester, so I am not necessarilly an expert. There are probably better ways. I just tried to treat each arrow exactly the same way at each step.

I put my drill in a vice, then chucked the arrows in the drill and did my sanding that way. I don't think the tapers are all exactly the same. I didn't use calipers to check it. However, that might be a good thing to check. I just thought the spine was more important thatn the taper.

Good luck and good shoot'n,
Doyle

[SAVIOUR68]

I thought this would be a easy question  with all the custom wood arrow builders on this site. Feel free to chime in custom builders.
 

[Flying Dutchman]

I am a pro, but I let my supplier spine them for me