Hans Grade (1879-05-17[1] - 1946-10-22) was a German aviation pioneer.[2]
In 1907 he began to build his first triplane. The first flight with this triplane was on 28. October 1908.
In 1910 he established the first aviation school in Germany.
In 1921 he established an automobile company called "Grade Automobilwerke AG", which produced small, 2 seater personal cars.
In 1939 May 14 he re-flew his original monoplane from 1909, then 30 years old, at Berlin Tempelhof Airport for about 550 metres to celebrate his sixtieth birthday.[1]