I have seen that. The A-12/SR-71 wasn’t purposely built as a launcher - it was a retrofit. I think dropping the vehicle might be a better way.
Boeing seemed to think they figured it out in 1989:
Aviation Week’s version, for what it’s worth, also had the spaceplane being dropped:
The Chinese seem to think its viable. Although, I’m. Little suprised by how close the vertical fins are spaced on their concept.
I guess if the Chinese manage to pull it off, we’ll know supersonic TSTO is a viable concept. Whether the US pulled it off 20 years ago, who
knows... There were quite a few sightings of something large and loud from that time frame (including my own) as well as mystery sonic booms, and
rocket-like rumblings over the desert southwest (Circumstancial but interesting).
I’m struck by the similarities in the Chinese video and the Blackstar and RASCAL rumors. I guess form follows function.
Here’s an intersting tidpit from a retired aerospace engineer in response to whether RASCAL was feasible:
“Quite feasible for “"second stage” that was light enough for the F-106 to get to altitude and speed. It was only going to be the “"first
stage” of the launch. In other words, the F-106 would have mounted the launch vehicle on the centerline or under the wing. It would take off,
perform a zoom climb to altitude and launch the missile carrying the satellite. The basic launch events exactly parallels the process used by the
Pegasus launch system, except that Pegasus uses an L-1011 as the launch platform.
Pegasus (rocket) - Wikipedia
So the basic answer to your question is a resounding YES it is feasible.
In the mid-80s when I worked for Martin Marietta we investigated the same concept but for a larger payload and booster than an F-106 could possibly
carry. Our concept was to use a B-58 Hustler as the launch vehicle. It had the advantage if a very heavy duty centerline pylon, long spindly landing
gear, and four J79 afterburning engines. That could get it and it's missile payload to a high supersonic speed at altitude. Unfortunately when we
looked deeper into developing a proof of concept, we found that all B-58s had either been relegated to pedestals at USAF facilities or converted into
scrap metal! The big advantage of the B-58 was the weight of payload (booster and satellite) that could be delivered to the highest possible altitude
and highest possible airspeed at release.”
edit on 19-11-2018 by TheHans because: (no reason given)