Re: Snapey's 1935 Racing Biposto

Posted by Ross On 2011/6/22 5:00:41

Thanks for the info on the Commer Knocker; I followed it around a bit on youtube and even found a working cutaway. Fascinating. What a wonderful sound under load.

A far as crossflow flatheads are concerned, they are called "T-heads" with a valve on either side of the piston, and that is actually a very old design used by Mercer and others. That layout causes a huge combustion chamber and thus low compression.

Point of fact, I cut my lawn yesterday with a "crossflow flathead" in my 1954 Gravely L tractor. Those are greatly beloved lawn tractors over here. My father bought it new; I have cut grass with it for 46 seasons. Sorry for the hijack.