Wes wrote:

Only doable with CNC. No such thing here.

Did they have CNC when they built the first Wankel engines?

I don't think so in 1957. Â*http://en.wikipedia.org/wiki/Wankel_engine


There does exist an approximation with some circles. But I think I lost the
formula.

Nick
--
The lowcost-DRO:
http://www.yadro.de