Turns out that the “Museum of Flying” has on display a large model of the Douglas Model 2229 supersonic transport. This design was studied for the FAA in the early 1960’s, and would have gone up against the likes of the Lockheed L-2000 and the Boeing 2707… had Douglas not determined that SSTs were economically infeasible and dropped out early. Consequently, the 2229 is one of the more difficult designs to get any good data on. I’d love to get a bunch of photos of this model from every conceivable angle (especially orthogonal views) and, it at all possible (very likely not), I’d also love to get measurements.
Someone visited back in 2015 and posted a few photos:
For all I know the museum may also have a nicely detailed engineering study document tucked away in their archive, but I have no “in” there to find out.