Where do the input energy go, and can it be reversed?

[Low-Q]

I got an answer at www.physicsforums.com. The guides will apply torque as well. But I wonder if this torque can be considered as torque the guides does not move.

Edit: If we take away the guides and add a second gyro which spinns the opposite direction. Will that system be rigid in any way? I know that precession is not longer present due to the counter rotationg gyros.


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[Low-Q]

Found some information about counter rotating gyros that was used to stabilize the Gyro Cycle:
The Gyro Hawk was a gyro-stabilized vehicle which used a two-gyro counter-rotating system." So, I got an answer to this question. Counter rotating gyros provides rigidity regardless of which perpendicular direction the torque is applied. No precession, just rigid (to a certain extent).


So, if I analyze such a system, the counter-rotating gyros will resist any change in alignment. That also means that the second counter rotating gyro in the experiment with or without the guides will slowly move downwards. The question is how slow compared to the angular momentum of the gyros, and the applied torque.


Work has to be done in order to turn the gyro perpendicular to its spin. Where do this input work go if all bearings are frictionless magnetic bearings?


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