I have this dream that someday we'll build a SR-710 that's 10x the size and carry a BIG payload. And then putting stuff into orbit will basically be strapping

I have this dream that someday we'll build a SR-710 that's 10x the size and carry a BIG payload. And then putting stuff into orbit will basically be strapping your thing to a "big" upper stage (but small relative to a whole rocket stack), loading it into the cargo bay and then some fancy flying. I know it'll never happen for a variety of reasons. But it's such a cool plane and when you think about cruising at mach 3 (2000mph+, 15% of escape velocity (http://www.sr-71.org/blackbird/sr-71/) http://www.sr-71.org/blackbird/sr-71/)) it seems like it could make the rocket equation for a plane-launched rocket much, much more forgiving.