I'm a sucker for films set in the 1930s-era, and The Rocketeer is an old favorite. Disney totally blew it by not giving this franchise a chance to succeed and piled on the error by releasing both the DVD and Blu-Ray editions with no special features that show how the filmmakers brought the story to life.
I went looking for anything that might give some insight into this great film and uncovered a few tidbits.
The first is the page of Michael John Cummins, who did effects work on the Nazi zeppelin used in the film. He provided a few behind-the-scenes shots of the model.
Next up is a segment showing the stop-motion work done on the film from YouTube. It appears to be from a TV show (hosted by Christopher Reeve) and it is from the scene in the film featuring a Ford Tri-Motor airplane - one of my favorite planes.
Finally, a 'making of..." show made to promote the film, titled Rocketeer: Excitement is in the Air. While only part of this show is focused on the effects, there are some interesting bits.
Rocketeer Nazi Zeppelin
Rocketeer Stop Motion Props - Behind the Scenes
Rocketeer: Excitement In The Air