A possible explaination for the crash. I received this from a friend:
"Here’s the theory of the crash from experienced racers.
In 1989 this type of thing happened to another pilot but he lived to tell the story. When flying a P-51 at
450+mph you need to have full nose down trim to keep the plane level. The elevator trim tab broke off and the aircraft immediately went in to a 10G climb, confirmed by the G-meter. The pilot came to, from the sudden blackout and realized he had slipped through the shoulder harness and was looking at the floor of the airplane. He was able to reach the throttle and pull it back to slow down and was able to recover and land.
In a picture from this month’s accident, you can see the P-51 upside down with a missing left elevator trim tab, and all you see is the back of the pilots head indicating he is being forced down in the cockpit. In another photo of the plane with the wings nearly level, and nose down c.80 degrees, the tail wheel has extended and there is no view of the pilot. The tail wheel is held up by hydraulics only with no mechanical uplock, thus indicating a high G-force causing it to extend. In all the pictures the pilot is bent down, head near his knees."