May 172016
A 1977 Rockwell concept for how to expand the utility of the Shuttle system: move the payload from the Orbiter and put it in a shroud ahead of the External Tank. This would have allowed for much larger-diameter payloads to be carried. The ET would of course have had to go into orbit with the Orbiter itself. More info and diagrams of this are in US Launch Vehicle Projects issue 1.
