Waspy, i reread post #87. Not knowing your background, your knowledge can only be judged by these posts - recanting newtonian physics is not a good start!
The problem in your analysis lies in the fact that you have not included the reaction to the mass tangential acceleration force in the central thrust bearing. So the forces acting at the central thrust bearing should be:
1. Motor torque to drive rotational accel/deccel.
2. Centrifugal reaction force.
3. Linear reaction to tangential accel.
Force 3 in combination with the tangential accel force is what creates the need for there to be torque 1. Rerun the analysis with this in place and you will find all the force impulse balances out over a cycle. The single rotor machine just sits there and shakes...
Physics makes you pay for everything!
Last edited by Graviman; 19th July 2007 at 08:49.