Hi!
I just wanted to inform you about a recent video on Youtube that replicates the Thornson principle.
A student have made a device in Lego and used a balance weight to prove the Thornson inertial drive force. He also explains the simple concept....
And wow, the thing moves....The only explanation would of course be movement of air by the rotor....But, but... the rotor moves the air equally in all directions, so I don't see that as the explanation...
I'll have to build one from my son's Lego and test this wrapped in plastic...
Here is the link;
http://www.youtube.com/watch?v=q-f6-6GSyZ4