Green-dot
With a bit of tweaking using current technology in a proven concept of 50 years ago this could be reality sooner than the Airbus patent. . . .
That futuristic Pan-Am concept aircraft aircraft actually few. It was called the XB-70 Valkarie.
A great project with high promise, until some maverick in a chase-plane ran into the back of it. A bit like TSR2, another great project with high promise, until the Labour Party ran into the back of it. And they destroyed the jigs and tools, so no future government could restart the project. That was just pure spite.
