Influence of Cut-outs in Elevator on the Static Longitudinal Stability and on the Static Elevator Effect
This is a 1934 NASA technical report on aircraft elevator cut-outs and longitudinal stability, issued as a research paper for aeronautical engineers and test pilots. The plates pair a three-view line drawing of an aeroplane with control force and elevator displacement graphs, and photographs of a tail unit before and after modification. A designer might take from them the clean technical plotting style, with thin black curves over fine grid lines and labelled axes, and the crisp contrast of the photographic tail views.
