"Jon Elson" wrote in message
...
Jim Stewart wrote:
Tim Wescott wrote:

http://www.setzstock.de/motor/

And here I thought I couldn't build motors because I lacked metalworking
skill -- obviously it's 'cause I don't speak German well enough!

I wanna see the plane this is going into...


It's probably too valuable to ever leave the
earth.


Yes, but I've seen some of these engines run at the NAMES show.
There was a guy with a 4-cyl in-line Bentley model that ran nicely, but
another guy had a 4-cyl rotary of his own design that was a total
screamer, turning a 12"+ prop at over 7000 RPM.
I was worried that people were standing to the side of this thing and if
it lost a prop blade there would be a BIG mess to clean up. Fortunately,
no such thing happened.

Jon

Hi Jon

I was under the impression that Rotary (radial) engines needed to be an
odd number of cylinders. Have I remembered this wrong??

Jerry