xcal
You are right and it is right. But physics dictates that the force applied in a specific direction is what equates to penetration, not KE. KE is simply a measure of
all available energy at a given point of arrow flight, some of which goes into noise, vibration, rotation, flexion, and
momentum. Force is defined as the rate of change of momentum of an object, which is why one should use momentum when talking about arrow penetration, not KE. For a much better explanation than I can give, please read this. It is very clear and easy to understand.
http://www.alaskabowhunting.com/Ashby-O ... n-W19.aspx
By the way, the charts are for a 400gr arrow. What about a 500 gr arrow, or a 600gr arrow? What do the charts look like for those? How does momentum compare for those 3 arrows? You can find momentum calculators on the web. Messing around with those can help a lot in understanding how KE and P (momentum) relate. P = MV so two arrows can have the same momentum but one can get most of it from mass, while the other gets it from velocity. The one with higher mass will have significantly more terminal P than the one that derives it from velocity because the heavy arrow will slow down less than the lighter one over the same distance.
Hope this helps. I just come from a place where I think that more understanding always helps.
Keith
Stand by the roads and look, and ask for the ancient paths; where the good way is,
and walk in it and find rest for your souls. - Jer 6:16
Micro 335 & 355
deerboyarchery.wixsite.com/trinitystrings
[email protected]
<{{{><