Do Opposite Rotating Discs Cancel Precessional Forces in Motorcycle Wheels?

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SUMMARY

The discussion centers on the mathematical analysis of gyroscopic precession, specifically whether two opposite rotating discs of equal speed and mass can cancel precessional forces. The inquiry is linked to a motorcycle wheel patent aimed at facilitating high-speed steering. Key insights include the importance of angular velocity vectors and the role of external torque in precession. Participants emphasize the necessity of vector math to resolve the question definitively.

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  • Understanding of gyroscopic precession and its mathematical principles
  • Familiarity with angular velocity vectors and their representation
  • Knowledge of external torque and its effects on rotational dynamics
  • Basic proficiency in vector mathematics and cross products
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Trying to find the vector math for gyroscopic precession - all web sites I've seen that deal with analysis don't include direction of rotation as a vector and I can't find a discussion in my texts on the subject.

The question I'm trying to answer is whether two opposite rotating discs of equal speed/mass will cancel precessional forces. This is being looked at in terms of a motorcycle wheel patent to make steering easier at high speed.

Everybody seems to have their own opinion on the subject and so it seems the only way to settle the question is with the math.

Thanks for any help
Robert
 
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Your angular velocity vector lies along the axis of rotation (perpendicular to the rotating wheel) in the same direction as the angular momentum vector (cross product of the radius vector and the linear velocity vector at some given instant of time).

What force is providing the external torque that's causing the precession?

Here's a link on precession that may help: HyperPhsyics - Precession Torques
 
Thanks Bob - the references mentioned will give me a little more info as well
 

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