RabidAlien
1st Lieutenant
Haven't heard of "Dark Blue Sky" either, but I found one called "Dark Blue World" at a local video store that was going out of business, it follows two Polish pilots from the days of the older pilot training a group of younger pilots, Germans invade and their base gets shut down by the Nazis, the instructor and his best student make their way over to England and join the RAF. Good movie, with some excellent dogfight scenes. Not sure off the top of my head if they were CGI or real, but I enjoyed the movie. I found it in the foreign films section.