The D.V.L. Gliding-angle Control : W. Hubner Design
A 1933 NASA Technical Reports Server record, catalogued from a technical memorandum on gliding-angle control by W. Hubner, likely written for aeronautical engineers and researchers. The pictures are two grainy photographs of a dark flat vane or panel on a striped surface with hand-drawn lines and a third page of plain line drawings showing aircraft three-view and wing-rudder assembly with figure captions. A designer might take from them the spare, diagrammatic style of early engineering reports and their clean technical line work.
