Paul,

You were talking about that friction drive for using the 100,000 rpm turbine
with the turbo compound.  I've never seen one of these things.  How does it
work?  How efficient is it?  Do you have any diagrams showing how it works?
I know I was talking about designing a special, lower speed turbine but it's
often better to use something off the shelf if possible.  On top of that, it
might package better.

There was some discussion of turbocharger durability on one of these
threads.  I was thinking about a marine style turbine with a coolant jacket.
That might help durability and it would reduce the heat in the cowling from
the plumbing.

Steve

It is basically a planetary. Here are some pictures of an off the
shelf version called a Rotrex super charger.

http://www.rotrex.com/
http://www.rotaryeng.net/turbo.html