Orionblamblam said:I've seen that design before. I *think* it's a Hiller.
Jemiba said:Found in the AHS Newsletter June 1956: "Vertol announces military contract for development of
VTOL-type aircraft" and this artist impression (post #4 to #7). I hope, this riddle is solved.
Jemiba said:Just fund a civil tilt wing project with four engines ...
(from Aviation Week 19/1968)