
Just off the bat, the wreckage isn't close enough together to indicate a collision. The aircraft also aren't angled in a way that suggests a collision, as the trailing aircraft is to the side of the lead aircraft and not behind it.
If your theory is that the trailing aircraft hit the lead aircraft which had landed and was holding on the runway, why is the lead aircraft angled 45 degrees away? If the collision was severe enough to punt the lead aircraft that far askew, the wreckage of both aircraft would have been basically intertwined.
While the runway might have been gravel, there was no apron.
What likely happened is that aircraft had to go onto the shoulder of the runway to turn around, where the lead aircraft got stuck. Trailing aircraft had to hit the brakes.
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