Caproni airplane Ca 73 (commercial) and Ca 73 ter (military)
A 1927 NASA technical report, drawn from a U.S. Aircraft Circular, giving three-view drawings and dimensions of the Caproni Ca 73 commercial airplane and its military Ca 73 ter variant. The pictures are plain line drawings with dimension lines, showing a twin-engined biplane flying boat from side, front, and above. A designer might borrow their clean technical labelling, with figures such as 47.8 ft length and 82 ft span set against simple outline views.
