Problem of the slotted wing : a communication from the Aerodynamic Institute of the Aachen Technical High School
This is a 1922 technical report from the Aerodynamic Institute of the Aachen Technical High School, issued through the NASA Technical Reports Server, presenting engineering research on slotted wings for aircraft designers and aeronautical engineers. The two pictures are scientific plots and drawings: a lift coefficient curve against angle of attack with many labelled test series, a plan view and front elevation of a slotted wing, wing section profiles, and a lift-to-drag graph. A designer might take their clean line-graph and technical drawing conventions, with dotted and dashed curves and fine labelled leader lines.

