Gentlemen,
I see your point when you read the technical definition of "ground loop", as for example on
http://en.wikipedia.org/wiki/Ground_loop_%28aviation%29
When you read Major Chrichton's report, the "
A/C ran off runway, causing A/C to flip over on back and nose over, props tearing into ground. Pilot knocked out. We hanging by belts
upside down. S
lapped pilot's face; he came to. Smelled gasoline. Both jumped out and ran but airplane did not catch on fire"
It seems to me that this incident must have caused some degree of (major) damage, even if the word "ground loop" was perhaps not applied correctly in Alain's initial post about this accident.
Of course it would be nice if a picture shows up, bringing us back to the question what B-17 "588" was involved.
Regards,
Leendert