Al, generally an oscillator, ugly or not, will only provide limited power due to losses on the "valve" face. There were a few designs that used conventional valves, some of which were used for commercial purposes, but that was rare. Having seen the pictures, I dont reckon your is ugly anyway. Alan In reply to your other comment, an early morning!! ----- Original Message ----- From: "Allen Messer" <al_messer@xxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Wednesday, September 07, 2005 2:44 AM Subject: [modeleng] Re: Tr: Re: Steam engine RPM ? I do not know what I would use it to power, but the Ugly Vertical Oscillator Engine is 1.625" Bore x 3.00" Stroke. I just wanted to build a BIG oscillator is all. Al MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.