One of the hidden advantages of the rotary is you
can use an old
fashioned large diameter super charger directly on
the e-shaft.
The classic direct drive low RPM aircraft engine
required a
step up gear box between supercharger and
crankshaft. No gears
required at all. Simple and very reliable with no
wear points.

If turbo compound the blow down turbine is now
divorced from the compressor.
This is the configuration used by the CW R3350 TC.

Paul Lamar

Louis Bigelow wrote:

this is an impeller we made for a bmw-801d engine
(restoration part for a fw-190) I had the same
thoughts some time ago. using something similar
this was gear driven to run 6-7,000 rpm.
Louis

Wow that is nice.

Paul Lamar
 
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