An Experimental Investigation of Wind Tunnel Wall Interference on Rolling and Yawing Moments Due to Deflected Ailerons

Author: Koch, Walter Louis

Year: 1940

Degree: Master's thesis

Advisors: von Kármán, Theodore; Millikan, Clark Blanchard

Committee Member: Unknown, Unknown

Option: Aeronautics

DOI: 10.7907/MN6W-EB71

Abstract

Wind tunnel tests were made on a model wing with deflected ailerons in both open- and closed-jet configurations of a small wind tunnel. Rolling and yawing moments and lift were measured at various angles of attack. The wind tunnel wall interference on rolling and yawing moments is determined by comparison of the open- and closed-jet results. An approximate comparison with available theories is included. It appears that the interference effects measured are somewhat smaller than predicted by the theories.

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