Well, first of all, they don't take off and land like an airplane.
Additionally, as I understand it, if one engine fails, the props are interconnected through a shaft that allows the good engine to move both props...obviously with less power. So not only do they land and takeoff like a helicopter, but they don't have asymmetric thrust.
Please correct me if I am incorrect about the asymmetric thrust, but that is what was explained to me
Roger! My point was I am guessing the Powered Lift folks who are seeking a AMEL ATP will have to do a Vmc demo, and won’t have the ability to waiver it!