John,
After posting the cliffhanger message last night, I went back to Youtube and found episodes of "Winslow of the Navy" and had nice shots of biplanes being shot from battleship's catapults. Curtiss Seagull??
There was a Bruce Gentry episode that I remember, where they used a scale model of a bomber (AT-11??) That, on the episode, dropped "real" exploding bombs.
As for Whirlybirds, have you tried Acorn media? They sell DVDs of old serials and TV shows.
https://www.acornonline.com/?websource= ... gIWL_D_BwESaludos,
Tulio