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Products in the second quality category are 100% functional, but they may have a minor defect that does not affect the functionality of the product itself. Each product is inspected and only then released for sale.
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For a very long time there have been discussions about how to properly measure the performance of replicas. With the advent of HPA-powered replicas, this topic has become even more hotly debated. Our most knowledgeable lead service technician, who has over a decade of experience as an independent player and as one of the most respected technicians in the country, decided to write up how it actually works. Many thanks to Racek of RacekCustomGuns for a very well written article on the performance issues of airsoft replicas.
Have a nice day, everybody. Today let's take a look at a slightly longer article regarding performance limits at events, gun measurements and the difference between AEG and HPA.
Personally I'm very glad for the limits on events, I remember the times when power was absolutely not a concern, so you could easily have 1J and 4J players in combat at the same time. The difference in range and play style was enormous.
Thanks to the limits, we have an upper limit on the power for the action, so it makes the game more balanced and personally, more fun. I would also like to mention that the power limits are purely a voluntary thing of the airsoft community and the organizers, as airsoft guns of category D are not restricted by law.
The limit can be used to restrict several parameters according to the space and thus adapt the game to the size of the space, limit the risk of injury, etc.
The standard measurement is with 0.20g and hop off. Unfortunately, this measurement is not at all indicative of the real performance of the gun. With AS weapons the power varies with the weight used, so with some weapons with higher weight there may be an increase in power, i.e. the kinetic energy of the shot, the so-called "joule creep" (often depends on the propulsion of the weapon), with some on the contrary a decrease in power. There is also a change in performance when the hop-up is set to different weight of BBs being used. For some weapons there may be a large drop in power of a few tenths of a joule, for other pieces the drop may be small, and for others there may be no drop at all. This also depends on the style of tuning of the gun and its propulsion. So how to get the most realistic data when measuring the weapon limit? (valid for all weapon types)
Occasionally, some organizers have different rules for AEG and HPA guns, where HPA guns have a lower limit or more limited weight. Even among the players there is still a tradition that "HPA hurts more" or "it shoots much further". So what is the "magic"? Well, nothing really - if we are comparing the same levels of weapons. If we compare an HPA gun and a basic or slightly upgraded AEG, the HPA gun will shoot much better and farther. If we compare an HPA gun and a full-up (and properly) tuned AEG, both guns will shoot the same. For a bullet with weight X, muzzle velocity Y, and rotation Z, it doesn't matter what propulsion shot it. Also, in the equation for calculating the stretch kinetic energy, there is no variable for the gun's propulsion.
So even though there is no "magic" in it, we can still find a big difference when shooting HPA compared to most AEG guns. That is the compressed air propulsion instead of the piston movement. So the BB gains more velocity from the start compared to the AEG, where it hops through at a low speed (as the piston in the gearbox is still accelerating). Furthermore, a bullet driven by compressed air is hardly braked by the contact area of the rubber band (while in the AEG this braking also slows down the piston and thus reduces the bullet's velocity). For this reason, there is almost no drop in performance with the HPA once the hop is set for a given weight. So if you measure 2J with the hop off, it is very likely that you will still get 2J after the hop is set.
And now we're gonna get a little confused!
So, is there a difference between them? Yes and no. As I wrote, if we compare the HPA to a basic or slightly upgraded AEG, there will be a difference, as there is no drop in performance with the HPA after the hop setting. However, if the AEG is well tuned (e.g. heavier piston, quality rubber with large contact area, soft pressure), there may also be no or only a slight drop in power after the hop-up setting. Then these guns can shoot the same.
So thank you to everyone who read to the end.
Author of the article - Racek Chief Service Technician - RacekCustomGuns You can follow his work on Facebook and Instagram