Junkers Ef 61
The Junkers EF 61 airplane was based on the Junkers Ju 49, and was one of the few German high-altitude bomber and reconnaissance projects before the World War II. Actually the project starts in September 1935. The maiden flight took place on March 4th 1937, but in September the plane crashed and was destroyed. The second prototyp was ready in in late 1937 but also crashes in december 1937, even before high altitude testing starts. After that the project was abandoned, but leads to the high altitude recon aircraft types of the Junkers Ju 86 in WWII.
