A prototype design for a drone rotor that can be 3d-printed and assembled - the rotor fits around a 27mm motor while fitting into a 48mm duct for a ducted fan to power high speed quads/drones with a ducted fan/rotor system - recommended to print in PETG, mechanically fit for over 30000rpm or a 500 gram high speed quad or 1kg impeller powered jet model model could of course be scaledd and fit any holding mechanism or larger motor for large impeller powered jet scale models