Kinetic Energy

[Fattony77]

How does one figure out the KE produced by one's set-up? I know there's a formula, but haven't found it as of yet. Thanks in advance.

-Tony

[Stumpkiller]

1/2 mass x velocity squared.  Mass in kilograms and speed in meters per second = Joules of energy.

But why bother?  It will be somewhere between 42 and 46 ft pounds of energy and STILL depend more on shot placement.

[Pheonixarcher]

http://redhawk-archery.com/ke.php

Hopefully the link works. I used to use this back in my wheel days.

[Looper]

A better indicator of how a bow will perform is momentum, not kinetic energy. Here's an article that really gets into the technicality of it all:  http://archeryreport.com/2009/11/arrow-kinetic-energy-momentum-archer/

And here is a quick calculator:  http://archerycalculator.com/archery-kinetic-energy-and-momentum-calculator/

[Yellow Dog]

Formula for kinetic energy. (Speed X Speed) X arrow weight / 450240.

What Yellow Dog said^^^^^^^

Bisch

[Caughtandhobble]

What Bisch said.   :D

[hybridbow hunter]

Originally posted by Stumpkiller:
1/2 mass x velocity squared.  Mass in kilograms and speed in meters per second = Joules of energy.

But why bother?  It will be somewhere between 42 and 46 ft pounds of energy and STILL depend more on shot placement.

You need a lot of bow to reach those KE #. Real world # are much around 30-35 ft.pound and less for most of bowhunters.
KE= 43 is a 600 gr arrow at 180 fps. Far from the average set up...

[**DONOTDELETE**]

Originally posted by looper:
A better indicator of how a bow will perform is momentum, not kinetic energy. Here's an article that really gets into the technicality of it all:   http://archeryreport.com/2009/11/arrow-kinetic-energy-momentum-archer/  

And here is a quick calculator:   http://archerycalculator.com/archery-kinetic-energy-and-momentum-calculator/  

Great info Looper, I agree with the article written that both KE & momentum should be considered with equal importance.

[Fattony77]

Thanks very much, guys!

Looper, fantastic articles to be read there!!! Very informative, and a fun little "rabbit-hole" to go down.