The intake does "droop". It allows more airflow at high angles of attack.
In addition to that, it limits the volume of air at high speeds to slow down the air and prevents a stagnant buildup in front of the compressor. It can only be effective up to a certain speed......most high speed aircraft need that ability to control the incoming flow......variable intakes and variable exhausts are reported to be responsible for very high thrust levels at increasing Mach numbers.....
The intake does "droop". It allows more airflow at high angles of attack.
In addition to that, it limits the volume of air at high speeds to slow down the air and prevents a stagnant buildup in front of the compressor. It can only be effective up to a certain speed......most high speed aircraft need that ability to control the incoming flow......variable intakes and variable exhausts are reported to be responsible for very high thrust levels at increasing Mach numbers.....
Regardless of the airspeed of the aircraft in question, it is vital that the speed of the air entering and then passing into the engine never exceeds that of the speed of sound.
Matt
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