Avro 642 commercial airplane (British) : a high-wing cantilever monoplane
This NACA aircraft circular from 1934, issued by the US National Advisory Committee for Aeronautics and preserved through the NASA technical reports archive, documents the British Avro 642 high-wing cantilever monoplane airliner for aeronautical engineers and researchers. The plates pair photographs of the aircraft in flight with three-view general arrangement drawings and detailed structural diagrams of its engine mountings and detachable wing trailing edge truss framing.
