Ehrenfried Günther Freiherr von Hünefeld was a German aviation pioneer and initiator of the first transatlantic aeroplane flight from East to West.

The Junkers W 33 was a German 1920s single-engine low-wing monoplane transport aircraft that followed Junkers standard practice making extensive use of corrugated aluminium alloy over an aluminium alloy tube frame, that was developed from the similar but slightly smaller Junkers F 13, and evolved into the similar W 34. One example, named Bremen, was the first aircraft to complete the much more difficult east–west non-stop heavier-than-air crossing of the Atlantic.