Yeah, I wish they explore the rotation close to a turbocharger but there's no way in the hell you can engineer an overdrive and spin it at 90,000 rpm (40,000 rpm @ turbo territory)....still, the system at the mercy of the belt and pulley size. The turbocharger are free wheeling system, some compressor in the hi-performance can go as much as 150,000 rpm.
This Rotrex system simply produced air by ratio -- like my tuna fishing reel lol:: -- 15:1.
I think the same concept. lol: