I am wondering if the following device produces a forward thrust. 

[![enter image description here][1]][1]


Setup explanation
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The North (red) and South (blue) poles of a permanent magnet are fixed to the cart as well as the copper spokes (brown) on the insulating disc (with orange). The disc rotates in the constant magnetic field $\vec{B}$. Only half of the disc rotates in the field. Note the position of the field is vertical. and the disc is horizontal. This is similar to the setup of the unipolar generator in Faraday experiment. 

Reasons for the question
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In this situation I think that the Lorenz force, $\vec{L}$ pushes the electrons in the conduction layer of the copper towards the edge of the disk creating a potential difference from the middle of the disk. In this situation, the electrons are accumulating in the copper spoke at the end of the spoke farthest to the disk center. Once enough of them are accumulated there, since there is now where for them to go, the potential eventually grows large enough such the repel forces become greater than the Lorenz force, hence no electron is moving anymore in the copper spoke, which is in the magnetic field.  
 
The question:
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What happens to the electric charge accumulated at the tip of the copper spoke while the spoke rotates in the contant perpendicular magnetic field? I think that Lorenz force continues to act on each electron, although is no longer able to move them due to electrostatic equilibrium. Is the cart then going to move forward? 

Looking at the electron as to a physical ball and at the copper spoke as to a tube and at the Lorenz force as to the centrifugal force, in this situation it seems that there is a centrifugal force only in the half of the disk.     


Device 2
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On the same lines of though, the following device is also considered:
[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/Qm5qD.png
  [2]: https://i.sstatic.net/QMsRb.png