Intense Gravitational Pull
SAS, I have to begrudgingly admit that is the most creative explanation for whacking a tail off!
Kind of mysteriously technological.
In late 1962/early 1963 the Ft Rucker school for boys had both straight and droop tail H-19's that one flew. Students flew both interchangeably. Instructors were very adamant about the non-use of aft cyclic in both, but almost manic about the subject in the straight tail. The two maneuvers that caused the problem were running landings and touchdown autorotations. Trouble was that this was early in the day of wheeled helicopters and there existed an instinctual tendency for pilots to slow up by dropping collective and bringing the stick aft. That was the underlying reason for the droop tail on the later H-19's. Surprisingly, though, the lesson wasn't absorbed fully and the early experience in the USN SH-3A provided further lessons along the same line. The solution in that case was a control system mod.
Thanks,
John Dixson