ORIGINAL: NEW61375
Since Kinetic Energy is determined by the formulaMass x Velocity = Force or kinetic energy what is the difference? I mean I understand shooting fast, light arrows for 3D but those same arrows produce almost = amounts of KEwhen compared toheavyier, slower arrows. Now consider the fact that it takes about 25-30 of kinetic energy to pass through a whitetail, unless you are dicussing hunting heavieranimals with thicker skins and bigger bones or you are a child/women or in some other way limited in your draw weight kinetic energy is important only if you are worried about how far your arrow sticks in the dirt after it passes through the deer you shot.
For example some numbers::
330 grains at 310 fps=70.44 ft lbs. of ke
450 grains at 270 fps = 72.86 ft lbs. of ke
I'm not seeing the difference as being very significant, both are close and well above what you would need to kill a whitetail.
Here is a KE calculator from Easton:
Bowhunting Info Kinetic Energy Calculator
And another with an article I found interesting:
Arrow Penetration - much ado about nothing?
Hm, ok.....well, here are some real world numbers for you.....This is from my set up, nothing changed except the arrow. Draw weight and length remained static....
355 grain arrow flying 318 = 79.7 ft pounds
490 grain arrow flying 282 = 84.8 ft pounds
That's over 5 pounds, which is a significant increase. That's almost an 11% gain in KE. Does that matter a whole lot in THIS case? No, not really.Not when figuring KE alone, but all the other benefits make it worth it.
A 10% gain in KE on a lighter set up though, say a youth bow, is significant, and could make a tremendous difference.
And dubbya, that's not opinion brotha....that's GOSPEL!
I still have nothing against light/fast by the way. It's just not for me anymore is all......I'm married, I'm allowed to change my mind.....You'll see soon enough if you keep up the way you are....
