Inside Out Library · ExploreAn Instrument for Estimating Tautness of Doped Fabrics on Aircraft (1939)NASA Technical Reports Server (NTRS) · leaf 14N.A.C.A. Technical Note No. 739 Fig. 3 Figure 3.-Application of tautness meter to a wing section.NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from An Instrument for Estimating Tautness of Doped Fabrics on AircraftMore like this
