Inside Out Library · ExplorePreliminary biplane tests in the variable density wind tunnel (1928)NASA Technical Reports Server (NTRS) · leaf 23Fig.7 Profile drag coefficients. 30 Atnospheres. Average Reynolds No. 3,500,000.NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Preliminary biplane tests in the variable density wind tunnelMore like this
