For any interested parties, the attachment is a quick and dirty (non-rigorous) derivation of the shape of the chamber in the Wankel. By playing with the gearing ratio and the eccenric shaft offset you can make some interesting shapes.

 

Yow! If that's "quick and dirty and non-rigorous" I'd hate to see "clean, accurate and rigorous". I got a headache just reading that. Thank God I'm in sales!

 

Arrghhh, I think that just overloaded and fryed my already underdeveloped matematical brain center...


Thanks God I am in IT...

 

As one of my profs used to say, "Sometime, when you've got a slow Saturday night, you can derive this...."

Slow Saturday night, eh? <G>

I don't see any hand waving (non-rigorousness) at the last step where you combine the two motions - it looks pretty straightforward to me.

I'd like to chunk this into Excel and play with it (I tend to have a lot of slow Saturday nights - I'm old). Great fun - Thanks!

 

yeah..... What? The time that people have on their hands is incredible.

 

Try the oval shape

http://www.allpar.com/mopar/turbine.html

 

 

thats cool. just put it in a spread sheet. just to check it out.