The Bell P-39 �Airacobra� was one of the principal fighter aircraft operating around forces at first of World War II. It turned out 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 relating to the pilot's legs. A 37 mm T9 cannon fired through center through the propeller hub. Entry toward cockpit completed up being through a side door.A complete of 9,584 examples was certainly produced, with increased than half being sent to the Soviet Union in lend-lease system.