mig21 engine airflow picture. explanation what some switches do on the fuselage. anti-surge doors etc...
i had some trouble finding out what the derumble doors are. also called anti shutter doors, anti-surge doors. couldn't figure out what the nozzle 2 position was too.<br />
after searching i found what these witches externally do on the fuselage. i made a picture with the explanations written on the picture. they all have to do with the engine airflow and engine and emergency settings and checklists. <br />
1:Engine compressor anti-surge doors<br />
control switch (automatic/manual)<br />
2:Nose cone control switch<br />
3:Emergency nozzle 2 position switch