A flight investigation of the reduction of aileron operating force by means of fixed tabs and differential linkage, with notes on linkage design
This is a 1938 NACA technical note, a flight investigation by the National Advisory Committee for Aeronautics into cutting aileron control forces with fixed tabs and differential linkage, written for aircraft designers and engineers. Its pictures are plain engineering graphs with thin black curves on gridded paper, plotting aileron deflection against stick force and linkage travel. A designer might take from them the shape of the force curves and the relationship between differential deflection and control effort.
