HIGH-LIFT AND LATERAL CONTROL CHARACTERISTICSnOF AN NACA 652-215 SEMISPAN WING EQUIPPED WITH PLUG AND RETRACTABLE AILERONS AND A FULL-SPAN SLOTTED FLAP

摘要

A wind-tunnel Investigation was made at low values of Reynolds and Mach numbers to determine the high-lift and lateral control character-istics of a semispan wing of NACA 652-215 airfoil section equipped with e 25-percent-chord, full-span, slotted flap and plug and -retractable ailerons. The ailerons were located at the 70-percent-chord station over the outer 49 percent of the wing semispan and were fabricated in five spanwise segments.nThe results of the investigation indicated that large increases in wing lift could be obtained by use of a full-span slotted flap, and also that a 15° or a 30℉lap deflection would probably be more advan¬tageous than a 45℉lap deflection for best airplane climb and flight characteristics; whereas a 45℉lap deflection may be more advantageous for landing or as a glide-path control.