Paul,

I was reading on the EPS Graflight 8 engine and noted the CGI (Compacted Graphite Iron) process to produce their weight reduction for the Aviation 350+ HP Diesel Engine they are developing.

Upon reading some articles listed below, it appears that Wankel Engine Rotors and Housings could  be made with this material, for improved Heat control and Weight reduction in the Wankel 3 or 4 Rotor Engines.  As I read it the machining of parts in addition to design deliver weight reduction to the engine.

The heat aspect of using CGI factors in using iron vs aluminum, going back and engineering the components of the Wankel with CGI material may deliver the solution to heat and weight to both the Rotor's and Housings. In the news letter I read that rotor weight reduction opens greater horsepower production opportunities.

CGI A New Material for Highly Stressed Cylinder Blocks and Cylinder Heads <http://www.sintercast.com/file/documents/pdf/library-2/technical-publications-1/cgi-a-new-material-for-highly-stressed-cylinder-blocks-and-cylinder-heads-1.pdf>

Why Compacted Graphite Iron - Cutting Developments Make Application Now Practical <https://www.competitiveproduction.com/articles/why-compacted-graphite-iron/>

CGI breakthrough - An advanced third-generation compact graphite iron process, called Graphyte Flow, is transforming engine production <http://www.enginetechnologyinternational.com/cgi_breakthrough.php>

Guesser-Compacted Graphite Iron for Diesel Engine <http://www.tupy.com.br/downloads/guesser/compacted_graphite_iron_for_diesel.pdf>

Thanks,

George F. Curtis Jr.

The problem is single stage PSRU planets appear to be limited to 3:1. So we are at the practical
limit of RPM.


Paul Lamar

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