Ian Andrew Bell wrote:>
> FYI, I knew that’d draw Rich out of his shell.
>
> Josh Gardner wrote:
>
> > remember hearing about such a concept, and I think (maybe) that is was
> > being called “XB-70” at the time.
>
> Yep.
Oops. Nope. Thought you were referring to the payload, not the powerplant.
-Ian.