.....or a simple way,so to develop this old "dream",can be expressed based on theory,as a "gravity unstable equilibrium".
The state of unstable equilibrium,can be your pencil,standing on its tip (inverted pendulum) on the table.
Whereas a normal pendulum is stable,when hanging down,an inverted pendulum is inherently unstable.
A simple game,in the line of stability,with an inverted pendulum (cart with a pole) ,made possible the development of robotics.
A simple game,in the line of unstability,with an inverted pendulum equivalent (lever with an hinged arm ) can open an unusual way-out for PM?!
Even more: inverted pendulum games,can be a common starting point for next steps /energy and transport !?
All the best! / Alex
....as a simple game with gravity,you can see and "exercise",if you take a look at : http://www.backshop.co.za/products/inver_table.htm
Really,it's a special "see-saw" ,that plays the gravity unstable equilibrium,via an inverted pendulum "equivalent"...so that you can swing,but more interesting,you can rotate continuously,also
All the best! / Alex
.....playing the idea of "gravity unstable equilibrium",can develop a torque/moment arrangement.
Moments can be viewed as a rotational natural action/flow.
Moments cause a body to rotate,or change angle.
Moments can arise when gravity action do not act through the center of gravity (equilibrium) of a body.
A moment is created by the offset between the support and the center of mass.
In a body-tail configuration(fish,bird),the tail/empennage plays an important role in the dynamics (unstability of the body vis-a-vis medium).
Because the basic medium is the inertial property of space,we must take into account not only the gravity fall/flow...
All the best! / Alex