Help Calculating time to recharge air tanks

[MrBasse]

I would go through and check all the math, but I learned a long time ago that with air storage it is faster and easier to just plumb it up and try it with a stopwatch to get an accurate measurement of time. I want to say that when we run our systems they charge from empty to full pressure in around 30-40 seconds. That is with reasonable hose runs and 4 stainless clippard tanks. From 60-90 would probably be in the 5-10 second range and 90-120 is at least 10 seconds.

With that said:

1. 2 seconds sounds fast to me, but when it is per tank it isn't as unreasonable.
   
2. as the pressure increases the compressor has to work harder to fill the tank, thus working slower.
   
3. compressed air is a tricky thing to measure with math, and fluid dynamics was never my friend
   
4. you'll likely never see 120 PSI in FRC