"What does the pilot say when he enters the cockpit?"
Baffles me. It's absolute gibberish. But never mind that; Aces High would benefit greatly from the very next sound, which is the loud whine as the propeller starts spinning.
I can't imagine what effect that aircraft's ancestor would have had on the audience, back in 1935, after decades of biplane-dominated air forces. It must have stunned them.