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 13mm MG-131 machine gun and two 20mm MG-151/2- cannons. The tricycle landing gear from the Me-309 was retained, wich worked better on the 509 due to the lower weight on the nosewhell - the Me-309`s front landing gear had collapsed during trials. Visibility was also better with the smaller nose. The project was cancelled along with the Me-309, but the Japanese made a similar aircraft, the Yokosuka R2Y Keiun, wich sufferd from engine overheating.

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