Angles of Attack and Air Speeds During Maneuvers
A 1921 NASA technical report on aircraft behaviour during maneuvers, with data charts of spin angles of attack and air speeds and a photograph of a biplane test aircraft. Its plots of angle of attack against time, and of wing and strut positions, show measurement graphs rather than decoration, useful to a designer wanting the look of early engineering data sheets: fine grid lines, dashed and solid curves, and small serif labels.
