I just got this from SunPerformance.com
It looks like you can fill up a 5 gallon tank in 4 minutes with a QA2

Quote:
Code:
FLOW RATE - 2.18 CFM
MAXIMUM PRESSURE - 105 P.S.I.
DUTY CYCLE : 40 MINUTES @ 40 P.S.I.

TIRE	RIM	VOLUME		TIME
31X 10.50	15 X 7	17.9 gal.		
			0-30 psi	3:15
			15-30 psi	1:28
			30-60 psi	3:40
33 X 12.50	15 X 8	23.8 gal.		
			0-30 psi	4:39
			15-30 psi	2:18
			30-60 psi	5:20
35 X 12.50	15 x 10	33.3 gal.		
			0-30 psi	6:00
			15-30 psi	3:00
			30-60 psi	7:05
TANK		5 gal.		
			0-30 psi	0:48
			60 psi	2:02
			80 psi	3:01
			100 psi	4:13
_________________________
I come from a land down under.