The Messerschmitt Me 509 was a project underway in Germany during World War II based on the Me 309 but with the engine located behind the cockpit like the US Bell P-39 Airacobra. The engine was a Daimler-Benz DB 605B driving a three-blade propeller and armament was to consist of two 13 mm (.51 in) MG 131 machine guns and two 20 mm MG 151-20 cannons.
Made by Messerschmitt.