# What is the type of nozzle used on the MiG-21 and MiG-27? [duplicate]

Generally supersonic fighters have convergent - divergent nozzles. What is type of nozzle used in MiG-21 and MiG-27?

Also please explain that how in a convergent nozzle where the max velocity in the nozzle is limited to one mach , how can the ac still go supersonic??

## marked as duplicate by Peter Kämpf, fooot, kepler22b, Firee, SMS von der TannFeb 14 '16 at 13:52

In theory, the aircraft speed is not limited by the exit speed, but the extra speed imparted to a mass of air by the engine (more the $\Delta v$, more the thrust). Basically, there is nothing that prevents an aircraft with convergent nozzle from attaining supersonic speeds, albeit the system is very ineffecient.