Pete D said:Using the Energy Calculator at Handloads.com, I came up with a muzzle energy of 142,948 ft.lbs. (using a 6096 gr. projectile at 3250fps. Bore 30mm/1.18 inches)
Wonder how many rounds the 30mm barrels of the A-10 are rated for? It seems like traditionally the larger the bore of a barrel, the less rounds they will take. An example:the 16" naval guns were rated for around 275-400 rounds depending on model before they needed to be replaced compared to the 5" naval guns were rated for around 5,000-10,000 rounds depending on model before they needed to be replaced. Just curious.
The formula is: f=mass x velocity squared
I worked on them some in Europe back in the day. Awesome beast.
If you're impressed by 150,000 ft-lbs of energy, go watch a few pickup trucks or SUV's drive by at 30 MPH. They'll each have about 150,000 ft-lbs of energy! On the freeway at 70 MPH, they're at about 850,000 ft-lb.
Even easier, go pick up a flashlight that uses 3 D-cells. You'll be holding about 180,000 ft-lb of energy! The D cells have about 60,000 ft-lb each.
To end up with units of force, we have to convert mass to force.
Wrong way.
Weight is force.
Mass is mass.
It is easier to just use slug (weight/g) if you do not have significant changes in gravity/acceleration.
Ought to be enough for deer.