Author: Robert B. Liddell

Publisher:

Published: 1944

Total Pages: 124

ISBN-13:

Summary: An investigation was made to determine the aerodynamic effects of horn balances with various plan forms and of guards on a horizontal tail surface. The results indicate that rounding the adjacent horn and stabilizer edges caused neglibible changes in the aerodynamic characteristics, except for the changes resulting from the decrease in the area momeent of the horn. The use of guards mounted between the stabilizer and horn was found to increase the slope of the lift curves with angle of attack or with elevator deflection. The negative slopes of the curves of hinge moment against angle of attack and elevator deflection increased as the guard area was increased.