problem is nasa went on a patent blitz of anything they could patent regarding not seen or implemented ideas such as a single wing wrap around, those fan mount wings begin to resemble a patented entity. It's not easy being first in anything, ohh the stories in my own life, just when I thought there was a ray of hope BAM along comes VTX. The nasa patent thing took place around 2014, of a single wrap around wing, one I discovered after making up a concept Chinook with one and stumbling across the patent in google searches for other aviation things of interest. Even nasa isn't original in that either.
Regarding the vtx reference, some time was spent reading about vtx's in the hf Mikado forum, a design borrowed in part from Sikorsky "X2" helicopter. The hf guru busts vtx a little right here https://www.helifreak.com/showthrea...t=784751&page=2
and after a little more reading and consideration (reading more vtx in the Mikado forum) I begin to see the marketing front ep of hf gets on about.
Breaking new ground in aviation costs BILLIONS at the fs level like the Airbus H160, the r+d and red tape alone.
btw, years ago, 2013, a hobby store had a mall copter with box art that when viewed from a different perspective, squinting. showed a heli with wings like the Mil24 and something like small turbine fans near the ends to make a compound heli, looked awesome and I have been slowly taking design cues from it and adding to my personalized helis (good for me) lol. Unlike Eurocopter x3 the wings were low, turbines allowing low wing placement on longer wings with less vibes than props. That allowed a smaller main rotor diameter. I think I kept an image of it in my photo files.