Gunner Asch wrote:


I had a brand new Marathon Elect 10hp 3450rpm motor kicking around so
I decided to breadboard it up into a bigger RPC and see if it would
run the Airco. Getting it up to speed was the problem, as I couldnt
spin it fast enough with a rope wrapped around the shaft, so micky
moused up a 1/2hp 110vt 3450 moter, pulley and flat belt to spin the
big motors shaft directly, before applying single phase power to it.
Which worked just fine.

God that big 10hp motor is loud when it runs....I could hear it 200
yrs away, Of course..bolting it to a pair of I beams, then sitting
loose on the top of my welding bench turned the bench into a sounding
board....aaaaack!!

I bet if you worked on it you could get that idler to run a lot quieter. Make
the feet *right* so nothing is twisted, nothing is loose, everything's just
solid and no teeny warps. Then rubber-mount the whole bidness. I bet that would
knock off at least 15 dB right there. A little enclosure would help a lot too.

GWE