This might have been mentioned already, but I had not noticed it on the list:

http://www.wankel-ag.de/seite1_e.html

Click "development" on the navigation bar. The claim is a 4-rotor
multi-fuel engine designed for Diesel/Jet-A/JP4/etc producing 260hp
for a dry weight of 152lb. Again, my apologies if this is old news.

-Chris

Vapor ware.

Paul Lamar