Makhonine Mak-10
…the rear one sometimes faired in, and faired, fixed landing gear. It was powered by a 480 kW (644 hp), three bank, W-configuration, twelve cylinder Lorraine 12Eb engine. The first flight of the Mak-10 was on 11 August 1931. During four years of development the Mak-10 was re-engined with a 600 kW (800 hp) Gnome-Rhône…