Wind-tunnel investigation of NACA 23012, 23021, and 23030 airfoils with various sizes of split flap (1939)
NASA Technical Reports Server (NTRS) · leaf 9
REPORT NO. 668—NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS Section lift coefficient, c, (a) The 0.10cw split Hap. (b) The 0.20c spilt flap. Figure 0—Section aerodynamic characteristics of N. A. C. A. 23021 airfoil with various sizes of split flap.
NASA Technical Reports Server (NTRS)
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