Hi,Professor Edward Stalker designed many helicopter Projects in USA,began with 1930s,and he continued tothe 1940s,and he formed Stalker Development Co.,in Bay city,Michigan.
That google books link is broken. Maybe this will work...
https://www.google.com/books/edition/The_Michigan_Technic/FE3iAAAAMAAJ?hl=en&gbpv=1
We have here the latest in primitive technology.
Internet + Opinions = OMG we are SCREWED!
Many thanks,Pepper.
http://blog.modernmechanix.com/?s=stalker+wing-less