NACA-TN-728

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

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T18:14:34Z
date available	2017-09-04T18:14:34Z
date copyright	01/01/1939
date issued	1939
identifier other	HHYIYDAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/197521
description abstract	INTRODUCTION The National Advisory Committee for Aeronautics is conducting an extrusive investigation to determine the relative merits of various types 32 lift-increasing devices. For use in take-off, a high-lift device capable of producing high lift with low drag is desirable. For use in landings, however, high lift with variable drag is believed desirable. The slotted flaps being Investigated by the N.A.C.A. are apparently capable-of fulfilling these conflicting Requirements. The purpose of the present tests was to determine the aerodynamic characteristics of the N.A.C.A. 23021 airfoil with a 40-percent-chord slotted flap. The section aerodynamic characteristics of the present airfoil-flap combination are compared with those of an N.A.C.A. 23021 airfoil with a 25.6G-Ijerdcnt-c.ho-rd slotted flap and of an N.A.C.A. 23012 airfoil with a no-percent-chord slotted
language	English
title	NACA-TN-728	num
title	Wind-tunnel investigation of an N.A.C.A. 23021 airfoil with two arrangements of a 40-percent-chord slotted flap	en
type	standard
page	23
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1939
contenttype	fulltext