This is really interesting, but I'm curious about two things: 1. How power-efficient is this compared to a similar-sized quadcopter drone? 2. Is it possible t

This is really interesting, but I'm curious about two things: 1. How power-efficient is this compared to a similar-sized quadcopter drone? 2. Is it possible to scale this up to the size of a small airplane (for 2-4 passengers) or even a large commercial airliner?