Inside Out Library · ExploreTest of a model propeller with symmetrical blade sections (1926)NASA Technical Reports Server (NTRS) · leaf 15N.A-O.A. Technical Note No.246 Fig.4 nD Fig.4 Model propeller No.3NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Test of a model propeller with symmetrical blade sectionsMore like this
