The Mitsubishi Ki-20 is a Japanese bomber variant of the Junkers G.38 airliner. Mitsubishi manufactured six aircraft under license from Junkers. These aircraft, designated Army Type 92 Heavy Bomber, served through the 1930s. During World War II, the Ki-20 served in a variety of transport and support roles.
Mitsubishi Ki-20
The Junkers G.38 was a large German four-engined transport aircraft which first flew in 1929. Two examples were constructed in Germany. Both aircraft flew as a commercial transport within Europe in the years leading up to World War II.
Junkers G.38
Junkers G 38s.
D-2500 at Schiphol, showing the windows of the wing cabins
First prototype at Berlin Tempelhof Airport showing spatted tandem main wheels, the aileron section of the "double wing" and—most unusually—retractable oil and water radiators