We all know about the 'peak horsepower' lie... but what about CFM?
My $100, 8-gallon HF compressor is rated at 4.5 SCFM @115 psi.
There are 7.48 gallons per cubic foot meaning that my 8 gallon
compressor is just a little over 1 cubic foot.
Assuming I am basically at standard pressure & temperature conditions,
this would seem to imply that my compressor should fill in under 15
seconds, i.e., (8/7.48)*(1/4.5)*60
But it takes more like 2 minutes to fill...
What am I missing here?