4. Douglass A-4 Skyhawk – U.S.A., Israel, Argentina
The Lockheed P-80 Shooting Star provided the US Air Forces with numerous advancements. The new planes lacked propellers and operated in a different manner than prior planes. In their preparation for the P-8-s, the propeller-driven trainers failed terribly. Finally, the fuselage of the P-80 was expanded to accommodate a second tandem seat. This is how the Allison J33-A-35 turbojet for the T-33 Shooting Star was created. It was the first jet fighter training aircraft for the United States Air Forces!
3. Mikoyan-Gurevich MiG 21 – Soviet Union
The Mikoyan-Gurevich MiG 21 became a standard plane in several military air units after its launch in 1959. The Indian, Libyan, and Soviet air forces were the primary users of this system. In the Soviet Union, this aircraft was the first to be capable of both combat and interception missions. It held a number of world records, including the record for the most supersonic aircraft ever built. Even if it is still in operation in other countries, this military aircraft can be purchased for civilian use. Over the last four decades, the Soviet Union and its allies are thought to have created around 10,000 units.
