JPL is planning already much bigger copters: > The current MSH concept has a mass of about 31 kg and a total diameter of just over four meters, with six rotors

JPL is planning already much bigger copters: > The current MSH concept has a mass of about 31 kg and a total diameter of just over four meters, with six rotors each sporting a quartet of 0.64 meter blades https://spectrum.ieee.org/the-next-mars-helicopter https://spectrum.ieee.org/the-next-mars-helicopter