Paul and all,
We would be bleeding pressure from the 45deg ATDC big push on the rotor.

But my problem is with the original premise... that we should divert the
hurricane flow.
And secondly that we should add surface area... both of which are a
detriment to the Rotary.

The spark kernel needs turbulence to develop quickly.  It is also helped
by compression and temperature.
Attached is a quote from Sir Harry Ricardo.

On the GM patent I think if we could change the stainless by-pass
inserts to non-bypass vacuum SS inserts (think thermos bottle) to
minimize heat loss it would be a great help.

Barry Bordes

Why do you think surface area is a problem? There will be no combustion
under
a metal plate on top of the rotor. I am sure General Motors checked that
before they
applied for their patent. The area  is too thin at .1 inch to support
combustion.

A very important part of this idea is to relive the high pressure in
the area where the aft part of the rotor is in close contact with the
wall of the rotor housing. That will reduce the velocity of the wind storm.

There is also not a reduction in pressure due to squish flow under the top
plate on top of the rotor. There is a slight reduction in compression ratio
but that could be made up  with a shallower bath tub.

Turbulence is fine but a wind storm on top of the rotor blowing the
mixture down stream
is something else. That blows the combustion away from the optimum
e-shaft angle.

Yes I agree about a vacuum's ability to insulate but ceramic rotors have
been built
with no significant improvement in BSFC. I suspect  GM found that out
when the
tested the 2 piece rotor.

It is called the adiabatic Wankel but it was a big disappointment.

The flow in the combustion chamber is the only really significant difference
between the Wankel and a piston engine.

---------------------------------------------------------------------------------

BTW if your planing on direct injection it may be better
to inject up wind.

Paul Lamar

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