Paul Your comments on this supercharger for rotary
http://www.camdensuperchargers.com/index.php?pag=403

Jean Prudhomme

Several  problems. Belt driven superchargers put a side load on
the front main bearing and a bending load on the e-shaft.

They burn more gas than a turbocharger as the turbocharger
recovers some of the waste HP in the exhaust to compress the intake
air. It always takes HP to compress air. Not just a bad idea...It is the law
of physics :)

They are heavier and larger than a turbocharger.

Paul Lamar