KE Formula

[Black Lake]

I know I have seen it here before, Whats the K.E. formula?

[fairfax1]

KE=SxSxW/450,240

or,

Speed squared times weight divided by 450,240

[Black Lake]

I am 278-280fps shooting a 29.25" maxima 350 (8.2 GPI) and a 100gr head/point, how much do you think the blazers, bulldog collars, inserts and knock adds? I am coming up with 340 gr not considering the above mentioned. Seems light?

[mich7mike]

1/2 * (mass) * (velocity)^2

[Joe Archer]

KE=SxSxW/450,240

or,

Speed squared times weight divided by 450,240
This formula has the conversion factor to go from grains to pounds.

...how much do you think the blazers, bulldog collars, inserts and knock adds?
They probably add a total of around 30 grains of weight. I would etsimate the knock to be 10 - 15 gr, The insert to be 10 -12 gr, and blazers to be about 2 - 3 gr. each.
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[archerjustin]

Somewhere in the neighborhood of 65 -67 lbs of ke---roughly. What's your poundage and draw weight? Seems a little slow for a light arrow.