Mark 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.

Mark wrote:
Sorry Paul, we talked about this in the car leaving Diamond and I hadn't
written it down either. I remember being suprised how thick the coating was.
About 1.5mm (1/16") as I recall.

Mark Wrathall
www.wankel.org

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