VTbowman Posted March 16, 2005 Report Share Posted March 16, 2005 Ok folks I am still seeing some people in here that are hung up on KE (kenetic energy) as being "THEE" factor of penitration. I feel its MO or momentum after my testing... I did some testing with a chrono last fall and used my 55#@28" recurve with 29" carbon arrows at different weights. I found that the heavier your arrow the more MO you gained and KE basically stayed the same even as your arrow speed dropped. Here are some numbers: 371grain arrow, 175 fps, KE=25, MO=.2878 398grain arrow, 170 fps, KE=25, MO=.2984 423grain arrow, 165 fps, KE=26, MO=.3094 485grain arrow, 152 fps, KE=25, MO=.3268 510grain arrow, 147 fps, KE=24, MO=.3324 I did this tesing because I was told my bow was not strong enough for white tails. I was told that a KE of 25 is the bare minium I should use. Then the folks at TradGang.com told me about going heavy on my arrows no matter what my spped was. They were right. My bow hits like a hammer! Quote Link to comment Share on other sites More sharing options...
JimT Posted March 16, 2005 Report Share Posted March 16, 2005 Re: KE vs. MO -Field testing numbers... I use heavy arrows for the same reason. They hit like a train. KE means nothing to me. Never really has. My 2315 arrows at 29" with a 100gr head going 245 fps do the job. I agree with your results 100%. Quote Link to comment Share on other sites More sharing options...
Chrud Posted March 16, 2005 Report Share Posted March 16, 2005 Re: KE vs. MO -Field testing numbers... 400 grains at about 275 FPS (hopefully!). Good enough in all categories. Quote Link to comment Share on other sites More sharing options...
VTbowman Posted March 16, 2005 Author Report Share Posted March 16, 2005 Re: KE vs. MO -Field testing numbers... I am not bashing KE, it does factor in too, but MO is the more important factor when your talking about penitration. KE is the energy, MO is the force, you need both but the higher the MO the hard and deeper your arrows will hit and drive... The funniest part is that people think if you pump up your arrow speed, that they will get higher KE. Dropping or lowering speed will do so but you need to increase or decrease by about 25 to 30 fps to see just 1 KE higher or lower. I think KE is just another catch phrase to sell bows as is FPS... Quote Link to comment Share on other sites More sharing options...
mitrrophybowhunter Posted March 16, 2005 Report Share Posted March 16, 2005 Re: KE vs. MO -Field testing numbers... You can not sperate MO with velocity (ie fps) They are fundamental elements of the equation. In terms you are arguing velocity against KE again. Not that you are wrong but your findings suggest that velocity is not everything! You must find a balance. Quote Link to comment Share on other sites More sharing options...
VTbowman Posted March 16, 2005 Author Report Share Posted March 16, 2005 Re: KE vs. MO -Field testing numbers... Oh yea I know that for sure and rest assured I am using a wicked 2 blade head from Magnus on those arrows. Of coarse with a recurve my range is under 20 yards too. 15 being optimum... Thanks bro... Quote Link to comment Share on other sites More sharing options...
VTbowman Posted March 16, 2005 Author Report Share Posted March 16, 2005 Re: KE vs. MO -Field testing numbers... So its even better MO then bowjackson gave me. Thanks bro!! You da man! I know my compound will blow and arrow threw a deer and keep going, and I have seen my recurve sink an arrow much deeper into a cedar tree then my compound did. D-OH!!!! But the point is I feel my recurve will hammer a deer at 15 to 20 yards no prob. Given I get a good lung shot. I was just amazed that MO kept going up as weight did and speed went down. Then even more amazed that KE basically stayed the same in a 25 to 30 fps swing... Thanks again! Quote Link to comment Share on other sites More sharing options...
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