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Author Topic: kenetic energy?  (Read 371 times)

Offline joe ashton

  • TG HALL OF FAME
  • Trad Bowhunter
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  • Posts: 4298
kenetic energy?
« on: January 28, 2008, 11:14:00 PM »
Hi all.

Could someone run through the math used to calculate the  foot pounds of energy an arrow has please. I just read Chuck Adams' article in Bugle Mag' on penetration. It made me curious. The math he outlined did not work.
Joe
Ps 5 mo, 3 weeks and 4 days 'til Elk season.
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Joe Ashton,D.C.
 pronghorn long bow  54#
 black widow long bow 55#
 21 century long bow 55#
 big horn recurve  58#

Offline T-Bone

  • Trad Bowhunter
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  • Posts: 67
Re: kenetic energy?
« Reply #1 on: January 29, 2008, 12:26:00 AM »
fpsxfpsxarrow weight/450240=ke   Ke is not too important when your talking about trad gear.  Momentum is a much better penetration indicator IMO.  If your going for elk with a lighter setup, it's best to shoot heavy arrows to get penetration.  At least 500, and preferably 550-650 grains.
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Offline Pete W

  • Trad Bowhunter
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  • Posts: 951
Re: kenetic energy?
« Reply #2 on: January 29, 2008, 11:37:00 AM »
use the calculators at   www.bowjackson.com
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