I'm with the fake aircraft theory. I remember my 1950s elementary school textbooks and workbooks were decorated with stylized artistic renditions of futuristic versions of everyday objects: glass dome enclosed cities, cars with transparent bubble bodies, Disneyland style monorails, steam locomotives with 15 drive axles, "Super Stratocruisers" with 6 engines, "Spruce Geese" with no water hull and B-19 style landing gear, etc.
In my 7-year-old technocratic arrogance, I had nothing but loud and outspoken contempt for such fanciful distortions of reality. I KNEW what the REAL stuff was, Damn it!!
Y'all have fun now, hear?
Wes