As you can tell, I'm no High Altitude Hybrid. The thought process prolly went something like -- it hangs from the rotor like a Christmas Tree ornament so make it like those inflated boxer toys with the weight in the bottom. So much for reasoning by analogy.
I also notice that I argued past the sale, assuming an electric autogyro.
If the mass of the batteries was a spinning gyroscope you could use that for attitude control.
