Oh, I should also say, for a helicopter autorotation is only particularly helpful if you have enough forward airspeed or height to initiate it. Helicopters come

Oh, I should also say, for a helicopter autorotation is only particularly helpful if you have enough forward airspeed or height to initiate it. Helicopters come with an HV diagram indicating safe flight envelope, such that autoration could be initiated in case of an engine failure, or you are low enough for a crash to be survivable if you do not have enough height or airspeed for autoration. https://en.wikipedia.org/wiki/Helicopter_height%E2%80%93velocity_diagram https://en.wikipedia.org/wiki/Helicopter_height%E2%80%93velo... In an eVTOL, if you have enough height or velocity, you should be able to glide on the wing. So you'll be wanting to keep yourself in the appropriate region of the HV curve, and your emergency engine out procedure will be much more like a conventional fixed wing aircraft, rather than a helicopter.