A few years back, I saw a picture of the S-11 but it was parked behind another aircraft, and wasn't referred to in the write up. Since then I've tried to find out what it was and yesterday, I finally found it. A very nice looking plane and it's a great pity it didn't make it into production. I'm sure it would have been a winner in only they could have solved the problem that caused the second aircraft to crash (seniors moment)I've been thinking about your design for a while, and have come up with something similar for similar reasons. I am struck by how similar this is to the RANS S-11 Pursuit -- check it out!
Back in the day, there were not the computer power or the publicly-available software to do simulations of these vortex flows. Would it not be possible today to design a plane that could reliably take advantage of them, rather than have them make the plane difficult or dangerous to fly? And I know, I've seen the abomination of the vortex-breaker on the F/A-18, that was made necessary by exactly these same kinds of missed-predictions (even with the resources of Northrup to do the simulation and testing.)Everyone was excited about the S-11 when the proto started making the airshow and magazine circuit rounds. The big question was, "When are you going to release kits!??!?" The company played it cagey, saying "this is only a concept demonstrator" - for a transport airplane, of all things. Later it was revealed that the airplane was a real handful to fly, for the reasons Orion states above.