Buly, What a great idea, I'm wondering how that might be incorporated in an aircraft behind the pilot, without exhaust invading the cockpit area and maintaining low drag. It may also be a goer for the single Rotor - might even get 150 hp out of a single yet Rusty! George ( down under) > Rusty, here is the link for one of the companies using the gear pumps for turbo scavenging: > http://www.chevyhiperformance.com/techarticles/148_0502_turbo/ > Look towards the bottom. > Buly > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html