MiG-21F-13M2
The MiG-21F-13M2 was an upgrade program made by East Germany and Czechoslovakia. The maiden flight was in 1978. It was developed to counter the F-16 and to bridge the time till MiG-29 arriving.
The Czech were responsible to integrate leading edge flaps and two additional hardpoints on the wings. They also installed the R-25-300 engine, which had the same dry thrust as the older R-13-300, but the afterburner gave 69 kN and it had a special dogfight regime which gave enormous 97.1 kN thrust for 5 minutes. With this thrust the MiG-21F-13M2 accelerates faster as any other fighter plane in Europe. With the new designed wing and the strong engine the maneuverability of the plane was dramatically increased.
The East Germans integrated a small but powerfull radar in the nose cone, which had a maximum detection range of 45 km and were able to detect a fighter size target at 22 km. They gave this bird the ability to carry a SPS-141 jamming pod. And they integrated the R-60 missile into the weapon system. In the late 1980th the missile R-73 became part of the weapon system. At the same time the plane was fitted with a helmet mounted sight for the pilot.
Positive was: The plane was agile, nimble and highly maneuverable. It accelerated very fast and had a very good climb speed.
Negative was: The plane had a short range and a short flight time. It was not able to use radar guided missiles.