The Mikoyan-Gurevich MiG-21 was one of the most widely used supersonic fighter aircraft in the world. They were and still are the backbone of fighter airforces of many nations around the world, and the MiG-21 will probably remain in wide spread service well into the next century.
The Soviet Union built a number of prototypes and experimental aircraft during the early 1950s to obtain information of the aerodynamics of a Mach 2 supersonic fighter. These prototypes were built with both swept and delta wings, both having powered slab tailplanes, and the delta was chosen for production. The true MiG-21 prototype, called Ye-6, made its first flight during early 1958, and the initial production run of thirty aircraft was completed during late 1958. These aircraft were designated the MiG-21 F and were given the NATO code name 'Fishbed-C’. Since then more than 10,000 remodeled types of this fighter have been manufactured and used not only by Soviet but by many countries.
The MiG-21 PF version was developed from its predecessor the F version. This new model had all-weather interception capacity newly added. The air-intake and large nose cone of the F version have been enlarged to install on the plane. The nose cone has R1 L 'Spin-Scan' radar system in it. The armament consists of a GP-9 23mm cannon, AAMs, rockets and upgraded electronic equipment, enabling an effective operational service in all-weather conditions.