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

Keith Moore wrote:

Paul:

Another thought;  use the exhaust turbine (90,000 rpm) to direct drive a two
pole generator and rectify to DC electric power.  Then power a DC electric
motor/generator connected to the rotary shaft (direct or by belt)

Perhaps you have seen Capstone located in Chatsworth?  Very interesting
tour!

Capstone Turbine was started by a couple of out-of-work engineers who
configured a Garrett turbocharger connected to a rotating magnet.  They then
added "air-bearings" (no lube and no wear), a burner and heat recovery HX.

Voila! - 30 KW at +30% efficiency, and very low emissions.
http://www.capstoneturbine.com/technology/techUnderHood.asp

Regards,

Keith Moore
LEZ

 
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