Inside Out Library · ExploreSimplified propeller design for low-powered airplanes (1925)NASA Technical Reports Server (NTRS) · leaf 15N.A.G.l.^ Technical Notre Mo. 212 Fig. 5NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Simplified propeller design for low-powered airplanesMore like this
