I guess what I meant by 'crazy' was the 'pushing the envelope' think tank mood which was exploring the options until the inevitable dead end hit them. You only have to look at the list of weird and wonderful projects and prototypes that abounded in the latter stages of WW2 and the immediate post-war period. Once the dead-ends had been sifted and sorted it kind of settled down into a conventional design paradigm with the occasional "outside the square" advance.