Wind-tunnel investigation of ordinary and split flaps on airfoils of different profile (1937)
NASA Technical Reports Server (NTRS) · leaf 8
231 ORDINARY AND SPLIT FLAPS ON AIRFOILS OF DIFFERENT PROFILE greatest increment in maximum, lift were both given by lift above that of the plain airfoil of more than 100 flaps on the N. A. C. A. 23021 airfoil. In this case an percent. The highest speed-range ratio CLmJODmin was given, however, by… … .8 1.2 2.0 /.6 a,degrees Cx. FiouBE 20.—Lift, drag, and center of pressure for the N. A. O. A. 23012 airfoil with Fiodbe 21.—Lift-drag ratio and pltchlng-moment coefficient for the N. A. 0. A. 23012 0.20c full-span ordinary flap. Flap gap sealed. airfoil with 0.20c foil-span ordinary flap. Flap gap…
NASA Technical Reports Server (NTRS)
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