Here is the state of the art in air cooled aircraft engine turbos.
This is a near brand new Piper Seneca.
They must be using a turbo oil scavenge pump.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site. Copyright 1998-2002 All world wide rights reserved.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org