posted
I was just wondering if the length of the broadhead has a direct affect in the dynamic spine of the arrow itself. Any thoughts or opinions? -Steve
-------------------- Groves Mag II 66# @ 28", Groves Mag II 55# @ 28", Groves Magnum 44# @ 28" Posts: 79 | From: West Tennessee | Registered: Apr 2012
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posted
No, I don't think so. Spine is the bending of the shaft, the BH doesn't bend as part of the shaft when the arrow is shot. The shaft only sees the weight of the head, not it's shape.
By the way, BH length doesn't affect FOC much either. A Majority of the weight of the BH is in the length of the ferrule. Very little mass or weight is out past the end of the ferrule.
-------------------- 9 H Hill bows 3 David Miller bows 2 Black Widow bows USA Archery, Level 4 NTS Coach Posts: 1372 | From: Grand Rapids, Minnesota | Registered: Feb 2009
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posted
I think the weight is what has the effect, the width of a BH could cause it to plane. I shoot Howard Hill heads(they are long 160gr) and see no difference in spine.
-------------------- Some people live an entire lifetime and wonder if they have ever made a difference in the world, but the Marines don’t have that problem. —President Ronald Reagan Posts: 7953 | From: NJ to GA back to NJ =Lost ;) | Registered: Sep 2009
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posted
I don't believe so. Nothing has seemed to change when I go from a shorter/fatter 125 VPA to a longer/wider 175gr Simmons. I do believe it's just the weight also.
-------------------- "The bottom line is, if you shoot something, be proud of it. If you can't be proud of it, don't shoot it. God didn't create any "justs." Neither should bowhunters." -Dwight Schuh Posts: 1591 | From: Freetown, Indiana | Registered: Dec 2005
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posted
I have never detected any differences due to broadhead length as long as the weight is the same, and I'm a bit of a tuning nut.
-------------------- Braveheart Archery www.braveheartarchery.us The web home of Firefly Bows. Shipping rates start at just $1.99! Trad Gang Sponsor since 2006 Posts: 2596 | From: Kansas City, MO | Registered: Jun 2003
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posted
There is some effect; it's just very, very minor. Since the broad head is rigid, the effect come from its center of mass being moved further from the string because it is longer. With the center of mass further from the string (a lever effect) it weakens the dynamic spine minimally, but not enough to make a hill of beans.
-------------------- Coil Spring Posts: 383 | From: North Alabama | Registered: Jul 2008
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quote:Originally posted by CoilSpring: There is some effect; it's just very, very minor. Since the broad head is rigid, the effect come from its center of mass being moved further from the string because it is longer. With the center of mass further from the string (a lever effect) it weakens the dynamic spine minimally, but not enough to make a hill of beans.
boom
-------------------- If some animals are good at hunting and others are suitable for hunting, then the Gods must clearly smile on hunting.~Aristotle
..there's more fun in hunting with the handicap of the bow than there is in hunting with the sureness of the gun.~ F.Bear Posts: 3893 | From: Shelby, Michigan | Registered: Oct 2008
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