All of the miniature aircraft sequences in the early part of the film are a series of take-offs and landings with an early model B17 miniature. Later sequences have some miniature attacking fighter aircraft shots and then the film really ramps up with a massive model ship sequence.
The ship models look like the same ones from Action in the North Atlantic another Warner Brothers production released in the same year. This film is set in the Pacific region so the enemy ships are Japanese. Readers of the modelshipsinthecinema blog thought that the ships in Action in the North Atlantic looked strangely Japanese given that they were supposed to be German. It would seem that perhaps indeed, as one commenter suggested, the ship miniatures were built for use in Air Force and then re-used for Action in the North Atlantic.
