Dornier Do Y / Do-15

The Do Y medium bomber had a high-set wing and and three engines, two on the wing leading edge and the third on struts above the wing. The Do Y was built in Switzerland in 1931 and possibly 4 were built. The first 2 models (Werke No 232 and 233) were powered by Bristol Jupiter VI engines with 2 bladed wooden props were ordered and delivered to the Yugoslavian government in October 1932. They were later captured by invading German forces in 1941.
The next two models again ordered by the Yugoslav goverment were powered by Gnome Rhone Jupiter 9 Kers engines with 3 bladed metal props offering a better all round performance.