Inside Out Library · ExploreCollection of wind-tunnel data on commonly used wing sections (1930)NASA Technical Reports Server (NTRS) · leaf 11600 REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICSNASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Collection of wind-tunnel data on commonly used wing sectionsMore like this
