our tests of combustion engine driven crankshafts connected to a spinning mechanism can perform well in both transatlantic flights and cross country road trips.
Yes, but as the saying goes, anything can fly if you strap a powerful enough engine to it... so we've demonstrated basic capability, and the rest is now optimizing its performance a couple orders of magnitude.
Not at all. "Anything can fly", but not everything can fly without killing you. The fundamental problem is three-axis control with stability. A source of power does exactly nothing to solve that.
