Keep 'Em Flying

Not their best, but by far not their weakest, the film provides the viewers with the duo in the Army Air Corps, or at least a training facility.

While there has been some comment on the wood and fabric airplanes in the film, filmed shortly before the U.S. got involved in World War II, many training facilities taught their students initially on such aircraft, just so they could learn the rudiments of flight. Later, the fledgling pilots would graduate to more state-of-the-art trainers.

Minor spoiler For the aero gags, the fabric airplanes worked well: in the "inverted" sequence, Costello's head wouldn't have been able to break through a metal skin.

I had this on VHS, and finally was able to locate it on DVD, in an A&C collection.