You are probably right... I too seem to recall that there were several "prototypes" that never got off paper. One of them may have been made into a scale model that probably wound up on a director's desk.
You nay also be thinking of the Rockwell X-30... though it really wasn't meant as a Shuttle "replacement."
Honestly android isn't a terrible operating system, and neither is iOS, but they both have their flaws, and are polar opposites of each other. Now windows on the other hand.... That shit is the reincarnation of the worst out of both ios and android
You nay also be thinking of the Rockwell X-30... though it really wasn't meant as a Shuttle "replacement."