Hi everyone, and thanks for reading my very first post in Physics Forums! I have been researching a way to construct a single person aircraft with vertical take-off and landing using a propulsion system similar to that of an RC-blimp. I found a video on youtube that illustrates the principle of how I would like the system to work, but on a much larger scale. Please view the following video before reading on: As you can see in the video, it is a "ducted fan" system with a motor underneath each prop. My question is, how large (hp/torque/displacement) of a motor and what type would I need to fit under a prop that would be able to lift not only the relatively small (<=300lb) aircraft body/frame, but also the pilot (<=250lb)? I look forward to hearing your input!