Junkers J.I Blechesel / Tin Donkey

Professor Hugo Junkers (1859-1935) became convinced that all metal structure was the ultimate answer to successful aircraft design, he produced the experimental J.1 "Blechesel" (Tin Donkey) to exemplify his 1910 patent for a cantilever all-metal wing.

The J.1 first flew on December 12, 1915, giving unexpectedly stable performance.