tailed-delta fighter was in production for more than twenty years. Early MiG-21's were simple
good-weather interceptors with a simple ranging radar, inadequately armed and with a very short operational range.
Later versions were vastly more capable. They could be recognized by larger nose cones, housing radar (more and more
powerful), and enlarged fuselage spines. They were also equipped with new and more powerful engines, and blown flaps.
'Mongol' is the trainer version.
Recently a series of upgrades of MiG-21's has begun, usually with Western electronics.
India did build MiG-21 until 1987; China still builds MiG-21, exporting them with the 'F-7' designation.
Over 10000 must have been built.
Ye-4 - tailed delta fighter with disappointing performance;