Inside Out Library · ExploreFull Scale Investigation of the Drag of a Wing Radiator (1929)NASA Technical Reports Server (NTRS) · leaf 91 N.A.C.A. Tschnical Note No. 318 Fig. 9 & 10NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Full Scale Investigation of the Drag of a Wing RadiatorMore like this
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