Inside Out Library · ExploreWind-tunnel tests of a Clark Y wing having split flaps with gaps (1938)NASA Technical Reports Server (NTRS) · leaf 51.4.0.A. Taobaical lot* Vo. 660 Tig*. 1,4NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Wind-tunnel tests of a Clark Y wing having split flaps with gapsMore like this
