The Bell P-39 �Airacobra� was among the principal fighter aircraft operating around forces in the beginning of World War II. It proved build by the Bell Aircraft Corporation. Its maiden journey was at April 1939. The aircraft's uncommon design showcased an Allison engine mounted through the entire fuselage, simply behind the pilot, driving the propeller through a driveshaft going concerning the pilot's legs. A 37 mm T9 cannon fired through center through propeller hub. Entry toward cockpit completed up being through a side door.A complete of 9,584 examples had been truly produced, with additional than half being delivered to the Soviet Union in lend-lease system.