I was thinking again Doug and I decided if Paxton does not need gears neither
do we. At first I rejected the idea as the balls would be too big and heavy
for the reduction ratio we need then I realized they don't need to be balls.
They could be disk with radiused edges. We already have a source of force to
keep everything in high pressure contact. No springs needed. Namely the engine
oil pressure annular clutch throw out cylinder. This means it does double duty
by keeping the CVT in contact and the friction planetary in contact.
Also when the engine oil pressure is released the planetary is disengaged along
with the CVT. This reduces the inertia load on the turbo charger allowing
it to spin up faster in automotive use.

I suspect the oiling will work better as you don't have a bunch of teeth zinging
around in several circles at supersonic velocities.

This should cut the cost greatly. No need for expensive high precision gears.

Paul Lamar

This series of Paxton blower curves says it all. Notice the max HP capability of this drive
is 21 HP. Right in the ball park for what we are looking for.

This is an excerpt from the book called Street Supercharging by Pat
Ganahl 1984 and 1992 ISBN 0-931472-17-3 S-A Design Books North Branch Mn

By removing the Paxton impeller and feeding the output of a turbo charger into this device
through a small shaft you would have a complete turbo compound unit with variable speed 
belt drive to the e-shaft. At a power level of 150 HP out of a 13B you could up
the HP to 170 HP at the same fuel burn. The BSFC would go from the current
.47 to .42 right up there with the best of any aircraft engine on the market
today. It would do much btter than this when optimized for our needs.
After all this is a 50 year old design.

BTW The efficiency island is rather poor for this compressor because of
the crude impeller design. A modern impeller with inducer could up
this to 70 or 80%.

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.