Inside Out Library · ExploreRelation of "Lilienthal effect" to dynamic soaring flight (1925)NASA Technical Reports Server (NTRS) · leaf 18Figs ^7,8&9- T Fig.8 … Fig.9NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Relation of "Lilienthal effect" to dynamic soaring flightMore like this