What was the first monoplane airliner with a full cantilever wing (no struts)? By Towpilot - Own work, CC BY-SA 3.0, Image source

By the mid 1930s, the gold standard of airliner construction was achieved: the DC-3 was a full aluminium aircraft with monocoque construction and a cantilever wing. But which aircraft was the first airliner with a full cantilever monoplane wing, no struts?
I nominate the Junkers F.13. All metal, transport, and monoplane.


  It was the world's first all-metal passenger aircraft and Junkers' first commercial aircraft.


First flight was June 25, 1919. 322 were built for various military and civilian operators.

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