Paul wrote:

With aluminum end housings the piston engine can't come close on
power to weight ratio of the Mazda rotary either. I think Mazda
aluminum end housings are inevitable sooner or later. The Diamond
engine has them and it is putting out 115 HP while weighing under 160
pounds (as I recall) PSRU included.

Fred Osborn wrote:

Does anyone know what the inner surface of the Diamond aluminum end
housings is made of or coated with?

They told us and I did not write it down. Mark Wrathal wrote it down I
think. Mark?
It is flame sprayed something or other. Not Nicosil. The rotor housing
is Nicosil.
It is quite thick as there is a slight recess machined in the end
housing to accept
the coating. If it were me I would just put hardened and ground sheet
steel in there.

Paul Lamar

Wow, that is quite a bit smaller than the Mazda.  Are there any plans on
a 4 rotor version?

Chris C.

As I recall we talked about that and they said no.

Paul Lamar
 
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