View Single Post
  #96  
Old 12-06-2018, 06:09 PM
AndrewM AndrewM is offline
 
Join Date: Sep 2008
Location: NW Calgary
Posts: 2,785
Default

Quote:
Originally Posted by Stinky Coyote View Post
Maybe? You call it momentum I call it sd. End of day it’s still frontal area x mass. Bit tricky to calculate on the Broadhead alone but the heavier arrow from same bow goes slower so it stops slower and the sd is higher so that helps it go deeper too, no expansion there. I believe Andrew pointed out a quadratic relationship? I love that btw, sounds about right for that increase in velocity to penetration and also recoil energy vs impact energy...inefficient and largely useless figures but that’s a good term to help explain it.😉
Momentum is not frontal area x mass and neither is SD. Lol