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01-24-2004 | 10:21 PM

#3

Arthur P

Giant Nontypical

Joined: Feb 2003

Posts: 9,175

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RE: formula for kentic energy?

Speed X speed X arrow weight (in grains) divided by 450240

Example: 400 grain arrow at 280 fps.. (280 X 280 X 400)/450240 = 69.65 ft lbs.

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