Originally Posted by
Sir Korsky
If you try and hold a stationary hover with a 30 knot tailwind, your collective will be up in your armpit as that little tail rotor tries to keep you straight.
I'm not sure I fully got your point. If you are in a stationary hover vs the ground while facing a 30kts tailwind your main rotor will be merrily working at 30kts relative airspeed. Silghtly above ETL, below high drag area. That is the spot where it will need about the lowest power throughout the whole envelope. So for the collective this will be the opposite of armpit.
That said, at the tail the situation will be vastly different. If not super quick on the pedals you will quickly have to test the stops in order to avoid playing sun and have the Earth rotate around you.