NJ: “A helicopter that suffers an engine failure will "auto rotate"….It's rather like a fixed-wing aircraft gliding after loss of engine power.”
Eddie: “ They can not glide as a fixed wing aircraft can.”
So who is right?:
https://en.wikipedia.org/wiki/Autorotation
An extract: “The most common use of autorotation in helicopters is to safely land the aircraft in the event of an engine failure or tail-rotor failure. It is a common emergency procedure taught to helicopter pilots as part of their training.”
It could be argued that a helicopter suffering an engine failure is actually better placed to land safely than a fixed wing aircraft. A fixed-wing aircraft has to maintain forward speed to avoid stalling and needs a far greater clear and reasonably flat surface on which to put down. A helicopter can land on any reasonably flat open space not much bigger than the aircraft itself. In both cases much depends on a suitable landing area but a helicopter will not "drop like a stone" unless its transmission is seized.