F-22 still makes breathing difficult

NY Times:

Oxygen Problems on F-22 Elude the Air Force’s Fixes


There seemed to be a step forward on oxygen flow problems last month, but then a pilot told of discomfort from intermittent airflow into his mask during flight.
I suspect it is a problem with the system for delivering oxygen rather than the plane itself.  It also could be in the software that monitors how the oxygen is delivered.  It may not be allowing enough oxygen to flow at times when it is needed most. I suspect this is calibrated by the altitude and maneuvers the plane is making.

It is a problem that must be fixed or the Air Force may have to convert these planes to drones.

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