Tesla's Flying Machine

"Not the airplane, the flying machine," responded Dr. Tesla.

In Motion - Rotating

Allow a moment for the 1.2 megs of images to load. Watch 2 that are opposite each other, then the other two. observe that each opposite pair sets up a back and forth motion on a plane and the 2 oscillations combined describe a circle. photographed on Fri., March 24th, 2006

Collectively, the center of orbit of the four "eccentrics" defines a circle for which the center point is the center of mass for the frame the eccentrics are built on. That creates the force field. There is no need to get "hung up" trying to accomplish great precision. Just make it as accurate as you can, like within a milimeter, and make adjustments after you have put it together. Eventually, this will be the centerpiece of a "flying machine" and this whole framework will be adjustable - to control the speed and direction of the craft.