Joules is the unity of the International System for measuring the Energy, Labor and Heat, in this case we are using the conversion to measure the Energy of a BBS fired by an AEG.
Many Airsoft sites and equivalents measure the velocity of projectiles in feet per second (FPS), this measure is a bit inaccurate at the time of providing information. The FPS may vary by climatic changes such as rain and wind, or by personal issues, such as those who prefer to use BBS 0.12 grams or 0.30 grams.
The advantage that gives us the Joules is that we have an accurate measure of what we need to know about how our AEG shots, if an AEG shots a BB at 400 FPS with a force of 3 Joules, is likely to shout louder than at a 400 FPS with a force of 2 Joules. We can say that the pain is directly proportional to Joules.
When measuring, we can be confident that our BB will always have the same Joules at shooting, either on a rainy day, gusts of wind and even in a vacuum, all types of atmosphere and the weight of BB.
Due to the laws established by the various Airsoft clubs regarding the limits of the FPS, I think it would be a little more conscious change FPS by Joules. It would be sad if a BB shooted by someone at 400 FPS hit harder than your AEG at the same speed. |