I know I am a simpleton on these matters but so f--king what the Hp of the rotor is ! All you have to know is the bit that turns it whether it be a piston, turbine or a donkey stops what you need to do !
I can certainly vouch when Mr Lycoming threw his toys out the pram at 30 kts and 80 ft I didn't give a flying f--k for the hp on the rotor in fact I had never heard it spoken about so what does that tell you ? By the way I didn't hurt myself and only put a smile on a 300's rear cross beam ( Thank you Mr Hughes )