INTRODUCTION
In conjunction with the control-surface investigation by the National Advisory Committee for Aeronautics, the available data on unshielded horn balances have been summarized herein. The purpose of this paper is to correlate the available data and to present them in a form that may be of some assistance in the estimation of the balance characteristics for use in the design and alteration of control surfaces with horn balances.
The data used in preparing this r6sum6 include the results of wind-tunnel investigations by the NACA and by British experimenters and of flight tests by the NACA. The data were obtained from references 1 to 6 and from previously circulated restricted data obtained for the Bureau of Aeronautics, Heavy Department.
A bibliography that gives discussions of horn balances outside the scope of this resume also presented.