The Hanriot H 431 military airplane (French) : a general purpose biplane
This is a 1931 technical report from the NASA Technical Reports Server, a catalogue record for a French general purpose biplane, the Hanriot H 431, issued for aeronautical engineers and aircraft researchers. The pictures show the aircraft and its build: a plates page of engine and wing structure photographs in a numbered aircraft series, and a three-quarter view of the biplane on grass beside a plan drawing with dimensions. A designer could take the crisp black-and-white engineering layouts and the staggered wing silhouette as period technical imagery.
