| From: HEXX
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| Date: 09-Apr-21 |
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What effect, if any, does brace height have on spine (?)
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| From: Dennis in Virginia
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| Date: 09-Apr-21 |
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raiseing brace height softens spine, lowering it stiffens spine. Can be used to help tune an arrow to the bow.
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| From: GF
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| Date: 09-Apr-21 |
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But does it actually “soften“ spine by increasing the actual poundage, or does it just change the effective spine deflection by changing the point at which the arrow separates from the string?
20 or 30 years ago, I was under the impression that it was the former, but I’m pretty sure nowadays that it is actually the latter…
I would love to hear what GFL, FDP, Viper or Aromakr would have to say about that…
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| From: Mike E
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| Date: 09-Apr-21 |
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My experience is that they go hand in hand. The correct BH, the bow shooting at it's most quiet will let you know what the proper spine/spines will work. For me anyway.
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| From: Viper
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| Date: 09-Apr-21 |
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GF -
Yes, increasing brace height will make an arrow act weaker. The two reasons are: first the slightly higher preload (greater initial push) causing paradox and second, the change in angle-off as the string moves forward (see pic).
Ya know this is all in my book, right ;^) ???
Viper out.
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| From: fdp
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| Date: 09-Apr-21 |
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"Ya know this is all in my book right?"
On page 73 of the 2nd Edition.
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| From: Jeff Durnell
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| Date: 10-Apr-21 |
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Common sense physics. The lower the brace height, the closer the string comes to the bow before the arrow comes off the string, and the more it has to flex to clear the bow.
The converse is true as well. The higher the brace height, the less arrow flex is needed.
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| From: EZ Archer
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| Date: 10-Apr-21 |
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Really good book!
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| From: aromakr
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| Date: 10-Apr-21 |
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The only thing that changes spine is length of shaft and/or point weight, that being said.
I agree with Viper that brace height changes the angle of the shaft when it is coming off the string which will cause a right or left impact of the arrow. the flex of the arrow remains constant unless length or point weight changes.
Bob
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| From: 2 bears
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| Date: 10-Apr-21 |
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If every one read Tony's book we wouldn't have any questions on here. It is truly a one book covers all read. >>>>-----> Ken
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| From: Pa Steve
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| Date: 10-Apr-21 |
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Jeff Durnell, that is the best explanation I've heard on this topic. Thanks.
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| From: HEXX
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| Date: 11-Apr-21 |
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Thanks for all your help, I have a lot to learn.
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