I recently came across this excellent short film, A LONELY SKY. It's a 10 minute film which shows the life of the X-1 test pilots (in a nutshell). Music is well done by one, Nick Seymour...with the title theme being mindful of James Newton Howard's "Beautiful" theme from King Kong. Look for "Dave Bowman" as in in "Hello Dave. What are you doing, Dave?" from 2001: A Space Odyssee (Actor Keir Dullea) in this film.
You can watch the film below or go to the official website and download a 720p HD version. www.aloneysky.com.