Inside Out Library · ExploreTest of an adjustable pitch model propeller at four blade settings (1930)NASA Technical Reports Server (NTRS) · leaf 21Pig.5 N.A.C.A. Technical Note No.333NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Test of an adjustable pitch model propeller at four blade settingsMore like this
