One of the guys on the CNC zone has written a nice little flash
application for generating the G code for machine out a trochoid. We
just have an error in the appication of Offset in quadrants 2 and 4.
http://www.devincox.com/newsite/epitrochoid.html

There is also a guy who is making stirling progress in a modified SW92
model engine.
http://www.cnczone.com/forums/showthread.php?t=11562&page=1&pp=10
<http://www.cnczone.com/forums/showthread.php?t=11562&page=1&pp=10>

Paul, you have answered this question before - but I lost the answer,
what is the standard relationship between major diameter and
eccentricity on the practical wankel? How about the offset "a"?
regards,
Mark


I am not sure what the questions is. Does this help?

Paul Lamar