You're obviously right, Ned. I believe it's something like 4 cfm @ 90 psi
equals 1000 watts based on what you can get out of a 1.5 hp compressor.
I have also sadly lost my copy of Halliday and Resnick, so I am not inclined
to do all the physics calculations to get a better answer. Obviously, the
temperature and barometric pressure will play a part too.

Grant Erwin

Ned Simmons wrote:

Ned Simmons writes:

CFM X psi for a compressible gas is not analogous to volts
X amps.

Actually, it is analogous:

CFMC amps
pressureC volts
power = CFM * pressure : volts * amps.

Ya think? If that's the case there should be a general
conversion factor such that cfm X psi X constant = watts.
What would that factor be?