A screen door on a submarine

Say, what's a great idea for a military toy? If you asked that question in 1932, you would have two hot answers: submarines and biplanes. So why not come up with some idea that combines them? How about a biplane-launching submarine!

The British tried that one. It didn't seem to work out too well for them. Something about not closing the doors on the sub.

"The Brits were the original pollacks."

(Courtesy Chris B.)