Junkers W 33

The Junkers W 33 was a German single-engine low-wing monoplane transport aircraft of the 1920s. Following Junkers practice it used corrugated aluminium alloy skin over an aluminium alloy tube frame, and it was developed from the similar but slightly smaller Junkers F 13 and evolved into the W 34. The prototype, registered D-921, first flew as a seaplane on the river Elbe near Dessau on 17 June 1926. One example, named Bremen, became the first aircraft to complete the difficult east to west non-stop crossing of the Atlantic. The W 33 normally used an inline engine, while the W 34 generally used radial engines.