I think Jeff (jeff.doddridge@gmail.com) cut these down for Mazdatrix.
It does away with the round oil seals which I suspect we don't need.
The oil seals have unavoidable friction which in theory burns slightly more fuel.
My guess, based on these enclosed charts, is a 33% reduction in rotary engine
friction. The engine will generate more power at the same RPM as well.

Furthermore the side seals will get more oil for possibly lower side housing wear.

It also cuts the weight of rotors so the counter weights are slightly lighter
and the load on the rotor bearings is reduced at any given RPM.

My Mazda Cosmo had melted oil seal O-rings and I drove it for years.
It smoked like a radial engine when you started it up but then it stopped after a few
seconds. I never noticed higher oil consumption.

Mazda mentioned this when they were talking about the first engine they built.
It ran fine but they had to add the oil seals to solve the start up smoke problem.

I think they will work fine in a p-port aircraft or racing car engine.

Sorry about the cell phone pictures. I forget my good camera when I visited Mazdtrix.

Paul Lamar


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