Well Nicosil has given problems. The guys at Diamond said there were
two
suppliers in England. One of which put out some bad coatings. Probably
the
downfall of Wankel Gmbh. Maule refuses to do it for aircraft engines.
Silicon carbide detonation coatings are very reliable but expensive as
they must be diamond ground.

I still think thin steel liners are the way to go. Both rotor and end
housings. If it
were me, considering the prospects for getting Cessna or Piper to
convert to rotary
engines I would say certification was not worth the huge gamble. Stick
with the
experimental market and use Mazda parts.

I still think that building a certified engine with their housings, and
your own or racing beat end housings.  I think you can get a great TBO
with Mazda rotor housings.  Risk of manufacturing defects is much lower
with all of Mazda's experience.

Either way a good aggressive port job is something few seem to do on
the aviation side.  Listmember Brian D. Cain of Grand Prairie Texas
does beautiful half bridgeports that would be great for a plane.  I
recall seeing some dyno results showing 480 RWHP on a Turbo 13B.  What
kind of boost levels at what RPM do you need with a half bridgeported
13B to reach 480 HP Brian?

Hans

 
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