"Geyser" wrote

"Charles Zimmerman, to the amusement of his engineering peers, proved the
theory that rotors on the top (i.e. helicopters) are inherently unstable."
http://www.hiller.org/flying-platform.shtml

So, what would you expect an article to say, that is trying to build support
for a rotor on the bottom craft? Of course that is what they would say.

Also, it is taken out of context, since the next paragraph talks about the
fact that they believe a person over the rotor will be able to use shifting
body weight to make the rotor under craft stable.
--
Jim in NC