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Wind tunnel tests on airfoil boundary control using a backward opening slot (1929)
NASA Technical Reports Server (NTRS) · leaf 11
N.A.O.A. Technical Note No.333 Fig.6 … -2 0 2 4 6 8 Wing prebsure Dynamic pressure Fig.6 Change in minimum drag due to slot at various widths and'pressures.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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