Originally Posted by
megan
He means it's unforgiving terrain in which to pull off a successful auto, as in, the same as going into tall timber.
At any normal tour altitude you would never be in the avoid side of the HV diagram. If it was just an engine out, there would have been plenty of time to autorotate to an acceptable spot for a zero speed landing.
Worst thing would be then rolling to its side. Which of course could theoretically start the fire we have seen.
I can’t see why it would be similar to autorotating into tall timber.