Its going to take you a while to make that plane work. The USAF rejected in real life in part because the plane has a mostly aluminum airframe with only titanium leading edges, not mostly titanium or steel like the SR-71/MiG-25/MiG-28/B-70. This means it doesn’t stand up to the sustained heat of speeds approaching mach 3 too well, though sustaining mach 2 is no trouble at all. Stuart is well aware of this, but chose to let it go ahead since the major development work fits with the bombers win theme of TBO.MariusRoi wrote: The Airframe is streached relative to the @ B-58
The USAF also considered the manufactures claimed range of 5200 mile to be implausible. It’s an estimate on my part, but 4000 miles is more in line with what could be expected. 5200 miles would mean range is increasing with four much bigger engines and very little extra fuel