"the key point is that we intuitively know that smaller craft require exponentially less power than larger craft."
This is where your intuition has let you down. Think about a normal helicopter's lifting capability and range as you go between models and full size aircraft. Or why you see bees walking.
This is where your intuition has let you down. Think about a normal helicopter's lifting capability and range as you go between models and full size aircraft. Or why you see bees walking.