Thank you Hank.....very informative. What you have described sounds very similar to prop de-icing, with the added hazard of rotor imbalance and bits of ice flying off into who knows what. I've experienced the disconserting feeling of hearing ice coming off of turbo-props and impacting the side of the aircraft.
Is rotor de/anti-icing used on tail rotors also?
Any pilots with experience of such systems care to comment?