Originally Posted by
F4E Mx
The BAe Hawk, with the RR Adour engine, first flew in 1974 when BAe was still Hawker Siddeley. At least the original had an oxygen system that worked.
Both the airframe and engines are highly updated versions.
Plain and simple. Pointing out that the first flight of the original engine was in 1968 is meaningless.
OBOGS has had trouble in nearly ALL airframes.
Guess making breathable O2 out of engine bleed air isn't simple.
Your habit of always trying to make more out of a problem than there is makes your posts less and less meaningful in my opinion.