Just a simple question for those who think they are versed in the subject. What groundspeed do you think the SR-71 could fly at sea level? You will have to extrapolate its groundspeed from what you know about the subject because it never flew at sea level. Just as I have been extrapolating its groundspeed at altitude from what I know about the subject because it never officially flew with an orbital groundspeed. While some are saying that it couldn't fly into orbit, it certainly could fly at sea level. It didn't fly at sea level but what would its ground speed have been if it had?

For those who need the conditions described to a pedantic degree; the tempreture is 80 degrees F, no wind, pressure 29.92, altitude 0 ft above sea level.