I found this site. in it are some articals out of the 30's - 40's etc.
http://blog.modernmechanix.com/2006/03/22/
it offers old modern Mechanix mags and other more fimiliar mags
Some old trailers and inventive ideas that never happened but it might spark something on this forum.
one drawing is of a motercycle with a built on teardrop. a 3 wheel.
A car that's roof risies etc.
Memories injoy
Ron