Pretty interesting subject. The original idea went through Garrett in the seventies before my time. The original airframe was supposed to be a DC8, the chief engineer at the time was a guy named Ben Prusek.
I had a friend who worked there as an engineer and every once in a while we'd cruise over to document control and look in the back for cool stuff, part of which was the Project Orbis file.
So old Ben, had retired and one day he comes to the place to have lunch with the fellas-I remember the occasion quite well. Shortly thereafter we hear through the grapevine that he's set himself up as an aerospace consultant and that he was working on a revival of Project Orbis...so me and my pal go out to document control and the entire file on Project Orbis had disappeared. Ben had checked it out that day and never returned what was, after all, not his property to dispose of.
If you believe in coincidence, you haven't looked close enough-Joe Leaphorn