I had a look inside Kermit's B-17 when visiting Polk City. Climbing up through the aircraft from the rear door to the cockpit, I remember remarking to an American fellow visitor "what an incredibly cramped space to go to war in...". He agreed! For some reason "Memphis Belle" had given me an impression of quite a lot of room inside...
I've got 1/48 scale kits of most Allied WWII types which I might build one day - the B-29 has been "tape assembled" in the past and it is big! I believe there was a vacform 1/48 B-36... Friend has built a
1/48 C-133 which is... big enough...