Similar to the flying boxcar, but even weirder (in my opinion) was the
Blackburn Beverley.
I used to visit a chemical works in the town of Beverley - standing on top of one of the outdoor chemical tanks I could view the remains of one of those beasts in the military museum next door.
Sadly there are no longer any flying examples. I saw this model flying at some shows around 10 years back (only 13% scale!) but even that model is now defunct.
(Website about the model version)