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Wind-tunnel investigation of an N.A.C.A. 23021 airfoil with two arrangements of a 40-percent-chord slotted flap (1939)

NASA Technical Reports Server (NTRS) · leaf 16

An illustration from Wind-tunnel investigation of an N.A.C.A. 23021 airfoil with two arrangements of a 40-percent-chord slotted flap, 1939, leaf 16 — 1.0.A. Taotmloal lot* Ko. 788

NASA Technical Reports Server (NTRS)

Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.

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