The Bell P-39 �Airacobra� finished up being one of the most significant major fighter aircraft operating around forces right from the start of World War II. It had been build by the Bell Aircraft Corporation Maiden journey April 1939. The aircraft's unusual design showcased its Allison motor mounted within the fuselage, just behind the pilot, driving the propeller through a driveshaft moving relating to the pilot's legs. a 37 mm T9 cannon firing through center connected with propeller hub. Entry toward cockpit completed up being through a side door.Total 9,584 instance was produced, with an increase of than half being brought to the Soviet Union in lend-lease system.