Determining spine of an arrow?
12-17-2007 | 06:27 AM
#1
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Typical Buck
Joined: Dec 2006
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From: Canning, Ontario. Canada
Determining spine of an arrow?
Is it trial and error or is there some math involved here? I have practice points flying great but my broadheads are drifting a bit, I have run out of other stuff to try so nowI am going to blame the shafts.
12-17-2007 | 01:54 PM
#4
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RE: Determining spine of an arrow?
If your feild points fly fine and paper tune fine then I would not blame shaft spine when using broadheads. There are broadheads that are known to not fly well, which ones are you using? If you want to know how shaft spine is determined, then it is the amount of deflection/bend in the shaft when it is supported at 2 points 28'' apart and made to bend by a 2 pound weight in the middle of the two points of support. Therfore a .340 shaft spine is stiffer than a .400 or a .500. There is video on youtube that shows this being done.
12-17-2007 | 04:53 PM
#5
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Typical Buck
Joined: Dec 2006
Posts: 974
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From: Canning, Ontario. Canada
RE: Determining spine of an arrow?
I use Slick Tricks, 100 grain. They fly absolutely awesome out of my other bows.
I am pulling about 65 pounds on a Jennings bow, a QAD drop away.
For arrows I have tried all that I have, and after finding a small fletching issue recently I am having great luck with practice points.
Arrows I have and tried with this set up:
Easton Axis ST's
Blackhawk carbon Vapors 4000's
Blackhawk carbon vapors 3000's
Easton LightSpeed 400's
The broadheads just seem to be drifting a little bit, and I was curious if there was math involved in finding the shaft I am after.
Redneck, that was very usefull information! I have great confidence in my broadheads, I have lots and they all do the same thing once my arrows are made and tested for wobble. I am using a combination of 4" vanes and 2" Blazers, they all do the same thing.
I am pulling about 65 pounds on a Jennings bow, a QAD drop away.
For arrows I have tried all that I have, and after finding a small fletching issue recently I am having great luck with practice points.
Arrows I have and tried with this set up:
Easton Axis ST's
Blackhawk carbon Vapors 4000's
Blackhawk carbon vapors 3000's
Easton LightSpeed 400's
The broadheads just seem to be drifting a little bit, and I was curious if there was math involved in finding the shaft I am after.
Redneck, that was very usefull information! I have great confidence in my broadheads, I have lots and they all do the same thing once my arrows are made and tested for wobble. I am using a combination of 4" vanes and 2" Blazers, they all do the same thing.
12-17-2007 | 05:21 PM
#6
Joined: Dec 2007
Posts: 6
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From:
RE: Determining spine of an arrow?
ORIGINAL: Pydpiper
I use Slick Tricks, 100 grain. They fly absolutely awesome out of my other bows.
I am pulling about 65 pounds on a Jennings bow, a QAD drop away.
For arrows I have tried all that I have, and after finding a small fletching issue recently I am having great luck with practice points.
Arrows I have and tried with this set up:
Easton Axis ST's
Blackhawk carbon Vapors 4000's
Blackhawk carbon vapors 3000's
Easton LightSpeed 400's
The broadheads just seem to be drifting a little bit, and I was curious if there was math involved in finding the shaft I am after.
Redneck, that was very usefull information! I have great confidence in my broadheads, I have lots and they all do the same thing once my arrows are made and tested for wobble. I am using a combination of 4" vanes and 2" Blazers, they all do the same thing.
I use Slick Tricks, 100 grain. They fly absolutely awesome out of my other bows.
I am pulling about 65 pounds on a Jennings bow, a QAD drop away.
For arrows I have tried all that I have, and after finding a small fletching issue recently I am having great luck with practice points.
Arrows I have and tried with this set up:
Easton Axis ST's
Blackhawk carbon Vapors 4000's
Blackhawk carbon vapors 3000's
Easton LightSpeed 400's
The broadheads just seem to be drifting a little bit, and I was curious if there was math involved in finding the shaft I am after.
Redneck, that was very usefull information! I have great confidence in my broadheads, I have lots and they all do the same thing once my arrows are made and tested for wobble. I am using a combination of 4" vanes and 2" Blazers, they all do the same thing.
12-18-2007 | 06:17 PM
#8
Joined: Jun 2007
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From:
RE: Determining spine of an arrow?
Well, I guess it may be a spine issue. You say you have tried other arrows that you have. Did that have a positive or negative effect on how they flew? Slick Tricks are good BHeads so I wouldn't doubt that they are not the problem. What was your fletching issue? Was that the problem? It could also be a small tuning issue in the bow setup that does not show up when you shoot your feild points.
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