Gravity wheel of Mikhail Dmitriyev

[Omnibus]

-The motors are used to create a permanently  unbalanced state of the system.

This is another way of saying that you're using external energy to create unbalanced state of the system. Such system is not OU. The permanent unbalanced state of the system, causing the wheel to spin, has to be created by the construction itself without spending of any external energy.

[dmfed]

This is another way of saying that you're using external energy to create unbalanced state of the system. Such system is not OU. The permanent unbalanced state of the system, causing the wheel to spin, has to be created by the construction itself without spending of any external energy.

Is the gravitational  force is not an external force relative to the device? Or magnetic force  (in devices that use magnetic force)? Or electric ...
Any device can not operate without an external force. Even a car with a gasoline engine will not run in the absence of friction, for example.
Another issue is the ratio of energy output (P out) to the energy expended
(P in). If this ratio is more than 1, this device is certainly consistent with OU.

[Omnibus]

Gravitational, magnetic and electric forces are external to the device but they are forces, not energy. A running device needs to spend energy, not force. Energy can be produced from force only if there are conditions for this force to cause spontaneous displacement. Spending external energy to give motors so that force of gravity  can cause displacement doesn't make that displacement spontaneous -- external energy has been spent for that displacement to occur. That's not an OU machine.

Further, it isn't at all obvious that expended energy is less than the putput energy in the device shown. Experimental data are needed to prove such claim and there are none for this device.

[dmfed]

Let me remind you that any amplifier with k>> 1 can easily be transformed into a generator at the expense of positive feedback.
Experimental data for this device are available and are shown in the chart here:
http://www.youtube.com/watch?v=XgKVnch4pdg
In principle, you can get any output power of a large quantity at any low input power. This should be done via summation of the input actions in  the system with a large number of elements . These conditions are provided with design features of the device in question. As example:
http://www.youtube.com/watch?v=aJ_yR_-VMRc

Similarly, even the ants can (hypothetically) to raise the  weight of several tons, accumulating counterbalance weight on one grain of sand. My hypothesis construction of the pyramids without using a powerful technique here:
http://mikhaildmitriev.com/piramid/
Please use Google translator.

[Omnibus]

http://www.youtube.com/watch?v=XgKVnch4pdg

The above device will only make sense as an OU device if it turns without spending external energy.