"Mark Rand" wrote in message
...
On Fri, 15 Apr 2005 00:15:50 -0400, "Shawn" shawn_75ATcomcastDOTnet
wrote:


"Tom Miller" wrote in message
...
When you say "radial", I take it to mean that you want a piston
compressor
with a number of cylinders radial to the crankshaft. The rest of the
group
appear to think "centrifugal".

I'm actually picturing a Nash type water ring compressor.

Shawn


My only experience of those is as steam turbine condenser air extraction
pumps, running at inlet pressures of 150mbar and outlet pressures of 1bar.
I
would expect that they could be designed for the OP's 40psi without any
major
problems. As for CFM, the ones I dealt with had 600hp motors on them... go
figure :-)


Mark Rand
RTFM

http://www.nash-elmo.com/english/pdf...L_500_E_Rz.pdf

Look at the HP models. The smallest will do 80 psi, 205 CFM at 100HP.
Granted, this is way more than the OPs 3/4 horse could do, but he did ask
for ideas.

Shawn