Peter Dohm wrote:
But the one builder that I knew
who actually started flying a Wankel powered Cozy MkIV finally gave up and
switched to a Lycoming O-360. From what I have heard, he was unsuccessful
at cooling the Wankel; but the Lycoming is running without problems.

That was Buly Aliev.. He was ready to FLY not to keep troubleshooting.
Cooling is a critical issue in a pusher, and you have to make changes
from stock cowling to really cool a wankel properly

John Slade has been flying his for 2 years or so, and while not perfect
is doing pretty good. www.canardaviation.com is his page. There is a
forum to be linked to from there as well.

Another forum, run by Jon Matcho (building, not flying) is Canardzone at
www.canardzone.com

If you are truly interested in rotary engines, check out Tracy Crook's
website, at www.rotaryaviation.com. There are two rotary listservs...

One is moderated and EDITED by Paul Lamar, an afficianado engineer who
has not yet built nor flown a rotary powered aircraft, and tends to be
more theory than practice, but highly technical at times. I unsubscribed
from his list years ago and haven't missed much; folks who disagree with
his findings are summarily dismissed.

The other is The FlyRotary listserv where you will find the majority of
folks who are building or have successfully started and flown homebuilt
rotary aircraft. www.flyrotary.com All are welcome. Webbased archives
available.

Dave