Paul,
I don't know if you have seen this video or not but I think it is
excellent in explaining
the rotary engine.  It was made by Mazda.  There are two parts.

http://www.youtube.com/watch?v=lyItjvs8nvI
Jim Brewer



Looks like a remake of this video that was done in the late
60's by NSU.

http://www.youtube.com/watch?v=yvri-fUNRyk

This has been on Youtube for years.
The problem with Youtube is somebody decides what videos
are brought up in the search engine. The possibilities
of corruption and discrimination are rampant.

Paul Lamar