People around the world are continually improving the
rotary engine. The latest from Hurley Engineering is grinding
the rotor slots. Jeff Spitzer mentioned a long time ago on here
how important it was to have a smooth surface finish inside
the apex seal slots.                                        

Quote from Hurley's web page. http://www.hurley-engineering.ltd.uk/

"Hurley Engineering can grind your rotors for 3mm or 3.5mm with corner pins.
 Only £50.00 / $80.00 per rotor.
 The best way to machine the rotor apex seal slot is to grind them on a surface
grinding machine.
 This method is far more accurate than using a milling machine and only takes a
little longer, also you can grind the  slots in the corner pins at the same time.
 The quality and accuracy of the tip seal slots is one of the most important parts of
a rotary engine, especially for  good sealing on turbo and racing engines where
blow-bye will quickly lead to detonation."

End of quote.

Paul Lamar
 
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