About stabilizing a space rocket with a pendullum

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The discussion centers on the stabilization of a rocket using pendulums, as proposed by team ARCA in the context of the Google Lunar X Prize. ARCA claims their rocket achieves passive stabilization in a vacuum through the swinging motion of pendulums in its lower stages. However, skepticism arises regarding the effectiveness of this method, as traditional stabilization typically relies on rotational gyroscopic motion rather than pendulum dynamics. Theoretical viability of the pendulum stabilization in a vacuum is questioned, with many asserting that it is not a practical solution. Ultimately, the conversation highlights the complexities of rocket stabilization techniques.
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About stabilizing a space rocket using a pendullum

There exists a competition called Google Lunar X Prize whose main objective is sending a rocket to the Moon. One of the contenders, team ARCA, is ready to launch a rocket (not a Moon rocket) about which they claim to be passively stabilized in vacuum by the swinging movement of some pendulums (the lower stages of the rocket).

A self explicative nice animation regarding the rocket of ARCA and its stabilization method can be downloaded from the following address:
VIDEO:
http://www.arcaspace.ro/

QUESTION: Do you believe that the stabilization procedure in the animation could work in vacuum, at least theoretically?
 
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One does not stabilize a craft by pendulum motion, and it should be obvious why.

Rotational gyroscopic motion is the appropriate means.
 

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