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The Effect of Slots and Flaps on the Lift and Drag of the Mcdonnell Airplanes Determined in Flight (1931)
NASA Technical Reports Server (NTRS) · leaf 17
IJ.A.C-A, Techxiiicol ITotG: lIo.398 Fig- 1 Fig. 1 Three-view drawing of the McDonnell airplane.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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