Today I was looking at the design of the mag and was working on my pneumag and notice my efficiency was bad. I thought oh Im dry firing that must be why. But then I thought some more. Mags use a dump chamber and as such they are always using the same amount of air per shot. So dry firing shouldnt produce any difference in efficiency should it?
The next thought then was about how I remember some spool designs being exponentially less efficient the higher the fps got. So my next question is in general what is the efficiency(meaning shots per tank) curve for a mag when adjusting pressure/fps? When I say pressure I mean at the rear of the mag valve while keeping the input pressure constant. I would be very interested in knowing this. I really dont have a cheap access to air or I would try it myself. It would seem like you wouldnt even need paint to test it out.
To test it I would think you would need to have a good chrono and also properly lubed and functioning guns. I dont know what the difference would be between a classic or an RT valve if any. I would try it by chronoing the gun in ten fps adjustments and then with a full tank(something with a gauge on it more precise than we normally use and also on a room temperature fill measured by a wrap on thermometer). Obviously this would require a very consistant setup to produce meaningful results. Take a counter and count how many shots from a fill at given fps(an average would be needed as a single test could easily show error). Then run the test from 200fps up to 330 or whatever number you want. Run it three to five times at least at each pressure making sure pressures are equal to start with as with temperatures. And then graph the results.
You could also change the input pressure to the gun which would be an entirely different variable.
Im not sure what you would see result wise. I would love to know if dropping my fps by 5 would increase my shot count by a large margin or by a small amount not worth the loss in fps.
I know to many this is a moot point as they have all day fill but I dont and not only is there no all day fill but if I play at home instead of at college I have a good hour+ drive each way to fill up my small 68/3000 tank. To me it is something that would be interesting to know and take into account when setting my gun for play.
I also realize that no gun is the same as another and results will be different for each user. Still they should be close and if it is tested on multiple guns an average could be found that would be the general rule.
The next thought then was about how I remember some spool designs being exponentially less efficient the higher the fps got. So my next question is in general what is the efficiency(meaning shots per tank) curve for a mag when adjusting pressure/fps? When I say pressure I mean at the rear of the mag valve while keeping the input pressure constant. I would be very interested in knowing this. I really dont have a cheap access to air or I would try it myself. It would seem like you wouldnt even need paint to test it out.
To test it I would think you would need to have a good chrono and also properly lubed and functioning guns. I dont know what the difference would be between a classic or an RT valve if any. I would try it by chronoing the gun in ten fps adjustments and then with a full tank(something with a gauge on it more precise than we normally use and also on a room temperature fill measured by a wrap on thermometer). Obviously this would require a very consistant setup to produce meaningful results. Take a counter and count how many shots from a fill at given fps(an average would be needed as a single test could easily show error). Then run the test from 200fps up to 330 or whatever number you want. Run it three to five times at least at each pressure making sure pressures are equal to start with as with temperatures. And then graph the results.
You could also change the input pressure to the gun which would be an entirely different variable.
Im not sure what you would see result wise. I would love to know if dropping my fps by 5 would increase my shot count by a large margin or by a small amount not worth the loss in fps.
I know to many this is a moot point as they have all day fill but I dont and not only is there no all day fill but if I play at home instead of at college I have a good hour+ drive each way to fill up my small 68/3000 tank. To me it is something that would be interesting to know and take into account when setting my gun for play.
I also realize that no gun is the same as another and results will be different for each user. Still they should be close and if it is tested on multiple guns an average could be found that would be the general rule.
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