Inside Out Library · ExploreThe Performance of a Depalma Roots-type Supercharger (1936)NASA Technical Reports Server (NTRS) · leaf 13N.A.C.A. Technical tfote No*558 Figs. 1,2,3NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from The Performance of a Depalma Roots-type SuperchargerMore like this
