Note: given many questions rg spinning objects, this is NOT related to perpetual motion or other similar dreams… Q: How do I convert mechanical work (ie: energy from a battery) into a spinning force (torque) on a self-contained object suspended from a rope. I am looking for an alternative method to using a gyroscope with a single horizontal axis pivot, where one applies a force twisting the axis of the gyroscope causing a pivoting force on the system. I was thinking a possible solution would be to find the CG (center of gravity) of the object and moving a weight in a horizontal “D” pattern with the center of the straight portion passing through the CG. If this works, then I speculated that an off balance wheel would approximate the same effect having a weight on the wheel pass through the CG and would be much simpler to implement. http://img401.imageshack.us/img401/4561/torquedevice.jpg [Broken] Is this the best solution or is there a better way of doing this, and what formulas would I use to predict the net torque created from each revolution of the wheel so I can predict correct RPM and weight needed on wheel to produce a given resulting torque. P.S. Sorry if I have incorrectly used terms like torque as my physics classes were so long ago I struggle to remember much of the finer details.