Amosgreg:
What I was trying to say was that penetration isn't necessarily liner with KE. This didn't show in Norb's tests...as he really didn't go very light. Even in the Modern Bowhunting article they only went down to 400gn yet the faster/lighter arrows out penetrated the heavier slowers arrows in both mediums...even though the lighter arrows had LESS KE.
KE goes up with velocity, but I think penetration would be more curvlinear than linear. In otherwords, ALL else being the same as you add speed, you will start to see a progressive increase in penetration, not linear.

To go along with the ping pong vs. golf ball thing. You guys are 100% right. Some bows work better at a certain end of the scale than others. But for penetration (read cutting) BOTH will need to go VERY FAST to "cut" anything.


In answer to the original question. "Does KE=penetration?" I say No....but it's close enough for government work.

Edited by - Stealth_Force on 08/23/2002 03:30:52