Gyroscopic precession with dual counter rotation

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Discussion Overview

The discussion revolves around the effects of dual counter-rotating flywheels on a metal rod, particularly focusing on the resulting precession and the manipulation of the rod. Participants explore the theoretical implications of this setup in terms of gyroscopic behavior and the forces involved.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant describes a scenario involving a meter-long rod with a single spinning flywheel and questions the effects of adding two counter-rotating flywheels of equal size, mass, and speed.
  • Another participant seeks clarification on whether the setup involves the same rod with two counter-rotating flywheels and prompts others to consider the implications of the video explanation.
  • A participant reiterates the initial question about the effects of dual counter-rotating flywheels, emphasizing the potential for precession and manipulation of the rod's weight.
  • One participant speculates that counter-rotation might prevent the rod from rotating like a wagon wheel and suggests it could lock onto its axis, resisting axial movement against the rotation.
  • A later reply expresses concern over a previous comment and emphasizes the intention to foster discussion rather than offend.

Areas of Agreement / Disagreement

Participants express varying opinions on the effects of counter-rotating flywheels, with no consensus reached on the outcomes or mechanics involved. The discussion remains open and unresolved regarding the specific behaviors of the system.

Contextual Notes

Participants do not provide detailed mathematical or physical frameworks for their claims, and assumptions about the system's behavior are not fully explored. The discussion relies on anecdotal observations and speculative reasoning.

jonatron5
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I watched an interesting video on YouTube by veratisirm where he had a meter long metal rod with a huge metal fly wheel on the end of it. Long story short he could barely lift the thing but under full spin he could just about swing the thing like a sword. the only thing was the precession wanted to keep the whole thing moving around him in a circle. My question is what would be the result if there where two counter rotating equaly placed equal in size equal in mass equal in speed flywheels. Would there be precession along any axis? would he still be able to manipulate the bar as though it where light weight? or is that purely an action of the asyemetry of it?
 
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You mean if you had the same rod but two, counter-rotating, flywheels?
Watching the video - the effect was explained right?
So, before anyone explains, what do you think would happen?
 
jonatron5 said:
My question is what would be the result if there where two counter rotating equaly placed equal in size equal in mass equal in speed flywheels. Would there be precession along any axis? would he still be able to manipulate the bar as though it where light weight? or is that purely an action of the asyemetry of it?
If you cannot come up with the answer yourself, have you tried to google "counter rotating gyroscopes" ?
 
Ok I have many responses but ad per requested I didn't look at any of them and am going to give it my best guess.

I would imagine that the counter rotation would stop the rod from wanting to rotate like a wagon wheel. (because I saw some exotic helicopter without a tail roter one time using this principle.

I also think it would tend to lock itself exactly onto whatever axis it was oriented on and resist being moved axial against the rotation.

However as to lifting it along a different axis I have no opinion or idea whatsoever if it would resist that assists that or be indifferent
 
A.T. said:
If you cannot come up with the answer yourself, have you tried to google "counter rotating gyroscopes" ?
Hey buddy I'm sorry if I offended you or broke some forum rules. I just figured it would be an interesting place to discuss it here
 

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