A New De Havilland Commercial Airplane : the D.H. 66 with Three Bristol "jupiter" Engines
A 1926 technical report issued by a NASA-archived aeronautics series, describing the de Havilland D.H. 66 commercial airplane with three Bristol Jupiter engines, aimed at engineers and aviation researchers. The first picture is a line drawing of a wing structure, the second is a pair of photographs of a large biplane's framework in a hangar, and the third is a technical sheet with side, front and plan elevations, dimension figures and a wing area table. A designer could take the crisp hatched linework, dimension callouts and lettered plate layout as reference for industrial diagram styling.
