I wish I still had that movie, is one of my favs....
I love this quote -
There was a demon that lived in the air. They said whoever challenged him would die. His controls would freeze up, his plane would buffet wildly, and he would disintegrate. The demon lived at Mach 1 on the meter, seven hundred and fifty miles an hour, where the air could no longer move out of the way. He lived behind a barrier through which they said no man would ever pass. They called it the sound barrier.
Then they built a small plane to try and break the sound barrier, they called it the X-1
Men came to the high desert of California to ride it, they were called test pilots, and nobody knew their names.
— Ridley in the 1983 movie 'The Right Stuff
Theuns