A Caltech Library Service

Low Speed Wind Tunnel Investigation of High Lift Devices on a 65° Swept-Back Supersonic Wing of 3.44 Aspect Ratio


Thomas, John William (1949) Low Speed Wind Tunnel Investigation of High Lift Devices on a 65° Swept-Back Supersonic Wing of 3.44 Aspect Ratio. Engineer's thesis, California Institute of Technology. doi:10.7907/TYRW-TZ93.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. A low speed investigation was made in the Cal Tech-Merrill Wind Tunnel at Pasadena City College of a 3.44 aspect ratio wing, having a 65° swept-back leading edge and a symretrical double-wedge airfoil section, to determine the characteristics and effectiveness of various high-lift devices. The investigation included tests of trailing edge split flaps and extended split flaps, leading edge flaps and slats, and combined configurations. The tests were carried out using the wing with and without the fuselage and tail surfaces. The results showed that the split flaps increased the lift over the lower regions of the angle of attack only. The extended split flaps were more effective and increased the lift over the whole range. The nose flaps tested did not increase the lift when used by themselves, but the combination of a nose flap with the fuselage and extended split flap produced the greatest lift. The addition of the fuselage added to the lift by increasing the slope of the lift curve. The addition of the tail surface gave additional increments in lift in the upper regions of angle of attack. The maximum lift coefficient, [...], normally occurred at an angle of attack of 38°. The extended split flaps produced large variations in pitching moment, but had stabilizing tendencies except where there were irregularities in the lift curve.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:Aeronautics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Nagamatsu, Henry T.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1949
Record Number:CaltechETD:etd-02242009-092302
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:745
Deposited By: Imported from ETD-db
Deposited On:24 Feb 2009
Last Modified:29 Mar 2023 17:28

Thesis Files

PDF (Thomas_jw_1949.pdf) - Final Version
See Usage Policy.


Repository Staff Only: item control page