On the Wankel engine bit I recently saw a brochure (i'll have a looksee if I can find it) on a new type of aero engine, I blieve that it was of a rotor type but with developments over the origonal wankel engines. The engine type is, according to my dad (aeronautical engineer) emminently suitable for turbo-compounding, and if properly developed could be the way forward. I think the engine has been fitted in a single verision to a Microlight for testing (as it is as of yet uncertified). The most interesting point about this engine was that you could run it on virtually anything, avgas, avtur etc. The main advertising point was that it was a repalcement for the ancient tech in Lycoming style engines.
If you're looking for ducted fans why not......
http://www.flickr.com/photos/29126266@N00/3022580624/
http://www.flickr.com/photos/29126266@N00/3029826972/
BTW these aren't my photos, mine aren't any where near as good as these. However I did do some work on the resotration of this particular aircraft.
The Optica is a cool design. There was someone making it at FreeFlightDesign.com
You got to work on it? How cool. Wasnt it made in Great Britain? Must be wild sitting in that all glass cockpit. Pretty wild design.
Bill