Paul
  I ran across this patent "Internal combustion engine with compounded air compression"
what caught my eye was the application of the idea to a rotary engine in Fig 3.  in the patent they are using a turbo charger and a rotary compressor which is mechanically linked to the rotary engine.  Very interesting and maybe a good approach as maybe the smaller rotary compressor could be directly linked to the main engine and therefore no need for a clutch assembly?  Anyway, wanted to see what you thought.

Mike C.

Looks interesting but I don't see how we can use it in an aircraft.
As a compressor it will suck more HP than a turbo charger.

Paul Lamar
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I agree with that but I think the claim was that

"unexpected results were obtained when both sides of the rotary Wankel-type unit were used as a compressor and driven by power from the engine shaft.  At lower speeds of operation, the turbocharger delivers no compression and all of the compression is provided by the rotary compressor operating as a blower.  At mid-range speeds both turbocharger and the rotary compressor contributed and develop an enormous compression.  At High speeds, the turbocharger develops sufficient compressed air to not only power the engine, but drive the rotary compressor which operates as an air motor."

It was the last sentence that got me thinking about direct coupled rotary compressors to the e-shaft with a set up like this.  Since we operate mostly at higher speeds... do you think there is anything to this?

Mike C

I don't really know. I think it would need to be built to test it.


Paul Lamar