Excel Joules/FPS Calculator

[Eyes On]

I created a simple .xls file to calculate safe velocity with any airsoft BB weight.

The maximum allowable energy under AP rules is 2.81 Joules using a bolt action replica. (.2g @ 550 FPS)

The maximum allowable energy for an AEG is 1.49 Joules. (.2g @ 400 FPS)

Using heavier BB's slows the velocity down, so if your replica complies with the applicable standard with .2's, then it should also comply with heavier weights as well... at least in theory. You should always chrono your replica before entering the field, or after upgrading/repairing internals / cleaning the barrel, or adjusting the hop-up significantly.

The file is available HERE.

[Drix]

It may be my computer, I am not sure. But when I click the link I get some FDA food website. Even when I copy the URL into website bar it does not work??

[Nox]

http://home.comcast.net/~jtbelcher001/J ... ulator.xls
is the address, the link has an additional 'http://url' in it.

[AKbandit]

...So can I legaly use a semi auto sniper rifle that shoots 500 fps??

[Eyes On]

...So can I legaly use a semi auto sniper rifle that shoots 500 fps??

Not at an AP game. That's a "N0ob Cannon".

However, I believe that PSAC allows even faster shooting Semi-Auto Only's.

[iocane]

if i have a bolt action that is a little over 580 fps with a .2g what wieght do you think would bring it down to legal power

[Eyes On]

You need to bring the VELOCITY down to 550, not the weight. 550 is the max velocity with .2's. Anything heavier will travel slower, but hit with the same (or slightly higher) force depending on factors like range, hop-up and some other more technical ones like temperature and humidity.

The max allowable velocity is 550FPS with .2's.

[fightingfish18]

When i go to the url it tells me that the url can't be found, what do i do?

[Beran]

try this

http://www.cimmerians.org/FPS_Converter.html?action=joules

its a different associations website, but the math is the same. i didnt check yours out gunny so i dont know if its the same calculations but it works for determining fps/weight/joules and all that good stuff.

[Eyes On]

Crap, that account got deleted a few weeks ago. I will upload another copy when I find it.

[Matt]

I can upload it to the AP server if you want to send it to me.

[DeathkillerCOBB]

How many joules are in a PDI !50 and 140 spring?

[Family Jewells]

It depends on the bb weight, if i have that correct. More experinced players correct me if i'm wrong.

[ShadowSniper]

It doesnt have to do with bb weight at all. the amount of force (Joules) stays the same whether you have a .20 or a .50, all that the weight of the bb affects is the velocity, range, etc. So, for example, the standard limit is 400 fps for .20's, and say your gun shoots at exactly 400fps with .20's. If you use .25's, then they will have a slower fps when they leave the barrel, but, they will have the same force as the .20 at the same range.

So, what they're trying to say is that if it shoots at 400fps with .20's then it should be good with heavyer bb's.

If any of this is wrong, please correct me.

[Eyes On]

Shadow, you are a "Go" at this station.