Muzzle energy?

[Camel]

Do any of you folks know of a website or program where I can imput weight and velocity and get muzzle energy? Is that even the correct term? Im kind of new to the whole ballistics thing.

 

[Vern Humphrey]

The correct term is "kenetic energy." Kenetic energy at the muzzle might be termed "muzzle energy," however.

The formula (developed by Issac Newton) is simple:

Kenetic energy = 1/2 Mass X velocity squared.

To convert weight to mass, you must divide by the gravitational constant, 32.2 ft/sec/sec.

The whole formula is:

Kenetic energy = 1/2 X weight X velocity X velocity DIVIDED by 7000 (grains per pound) X 32.2 ft/sec/sec.

You can easily plug this into spreadsheet -- like Microsoft Excell

 

[Camel]

I guess if I had studied a little harder that would make a lot more sense.

I found an equation that is simplified for people like me.

E=MV2/450400, where M is bullet mass in grains, V is the bullet velocity in ft/sec, and 450400 is a constant specific to English units of measurement.


14000 x 212.7^2/450400 = 1406.26 ft/lbs.

I found that here Muzzle Energy Calculator for anyone thats interested.