Earlier quoted context omitted.
My dad told me that when he studied construction engineering in the late 70s at TU Munich one of their assignments was to calculate if the Isar nuclear reactors are built strong enough to hold off a Mach 2.2 impact of a Phantom II. If I recall correctly the correct answer was that they were quite a bit stronger than necessary for that. However, I always wondered if a large civilian plane like a 747 with a speed close…
This video shows an F-4 Phantom being slammed into a concrete wall using a rocket sled: https://www.youtube.com/watch?v=U4wDqSnBJ-k At about 2 minutes in they show the aftermath. The plane is just gone , while the wall is a bit discolored...
That concrete block was not ridged. It moved when the plane hit it.
So the strongest aspect of concrete, compression, was tested. But the weakest, flexion, was untested.
What fun though.