A wind tunnel model of that was tested in the Ames 40x80' tunnel. It was a legend among the old-timers when I worked there. Why? It threw some blades that passed through the walls of the test section. Happily, no one was injured or killed.
Just read about this. It wasn't a model, it was the #10 prototype. They screwed up the vehicle constraints and got a rotor oscillation that led to the rotor striking the tail boom. That must have been one Hell of a show!
You know the guys at Ames had to be absolutely thrilled with Lockheed over that.
When I was at General Dynamics we had an F-16 model that lost a wingtip AIM-9 during a transonic run at Calspan. Tore the tunnel up pretty bad downstream. I thought my butt was in a sling because I did the stress analysis and signed off on the drawing. Turned out the machinist had used the wrong size drill, so when they tapped the hole for the missile rail attachments, they had hardly any threads at all. Talk about relieved!
They still watched us like hawks for the next three tunnel tests.
