Effect of length of Handley Page tip slots on the lateral-stability factor, damping in roll
This 1932 NASA technical report, as catalogued, presents wind-tunnel test results on how the length of Handley Page tip slots affects roll damping in aircraft wing models. The pictures are plain engineering graphs with black lines on gridded paper, plotting lift and rolling-moment coefficients against angle of attack and slot length; a designer might borrow their restrained chart layout, dashed-versus-solid line coding, and labelled axes for technical diagram work.
