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Some of the earliest experiments in this area were for the US army in the 1950s: https://en.m.wikipedia.org/wiki/Hiller_VZ-1_Pawnee https://en.m.wikipedia.org/
by throwawayben 3y ago
Some of the earliest experiments in this area were for the US army in the 1950s:
https://en.m.wikipedia.org/wiki/Hiller_VZ-1_Pawnee https://en.m.wikipedia.org/wiki/Hiller_VZ-1_Pawnee
https://en.m.wikipedia.org/wiki/De_Lackner_HZ-1_Aerocycle https://en.m.wikipedia.org/wiki/De_Lackner_HZ-1_Aerocycle