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Comparative Performance of a Powerplus Vane-type Supercharger and an N.A.C.A. Roots-type Supercharger (1932)
NASA Technical Reports Server (NTRS) · leaf 20
50 Speed,r.p.n -Pov/erplus (displacenent, 0.544 cu. ft •/revolution) <rf2500 N.A.C.A. Hoots (displacement, .509 cu. ft./revolution … Pressure difference, in. of Hg Fig.7 Horsepov/er required "by Powerplus and N.A.C.A. Roots superchargers at various speeds and pressure differences.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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