The Bell P-39 �Airacobra� was one of the principal fighter aircraft operating around forces in the beginning of World War II. It turned out build by the Bell Aircraft Corporation. Its maiden journey was at April 1939. The aircraft's unusual design showcased an Allison motor mounted throughout the fuselage, just behind the pilot, driving the propeller through a driveshaft going involving the pilot's feet. A 37 mm T9 cannon fired through center through the propeller hub. Entry toward cockpit finished up being through a side door.A complete of 9,584 examples was indeed produced, with increased than half being delivered to the Soviet Union in lend-lease system.