What is the minimum gyroscope speed to yield force precession?

In summary, the minimum speed of a gyro is dependent on the initial angular momentum and input torque, with any non zero speed resulting in a 90 degree offset for a small input torque. The magnitude of the procession effect is also affected by the moment of inertia, which is determined by the mass and its distribution. Using a box fan, the aerodynamic effects may have played a role in the lack of noticeable precession.
  • #1
richengle
26
1
Does anyone know what the minimum speed of a gyro to make it so a force at 0deg will yield a movement at 90deg... or even better, what the angle is wrt speed... see http://www.copters.com/aero/gyro.html for pictures.
-thx,
rich
 
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  • #2
richengle said:
Summary:: min gyro speed to yield force precession

Does anyone know what the minimum speed of a gyro to make it so a force at 0deg will yield a movement at 90deg... or even better, what the angle is wrt speed... see http://www.copters.com/aero/gyro.html for pictures.
Any non zero speed will have the 90deg offset for a small input torque



While the offset is always 90 deg, the noticeably of the procession effect depends on initial angular momentum vs. input torque.
 
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  • #3
A.T. said:
Any non zero speed will have the 90deg offset for a small input torque



While the offset is always 90 deg, the noticeably of the procession effect depends on initial angular momentum vs. input torque.

thanks, that explains a bike wheel. but i tried it with a fan, and didnt notice any precession. is it because it has less mass?
 
  • #4
richengle said:
thanks, that explains a bike wheel. but i tried it with a fan, and didnt notice any precession. is it because it has less mass?
The moment of inertia depends on the mass and its distribution. With a fan you additionally have aerodynamic effects.
 
  • #5
richengle said:
thanks, that explains a bike wheel. but i tried it with a fan, and didnt notice any precession. is it because it has less mass?
What kind of fan did you use?
 
  • #6
Lnewqban said:
What kind of fan did you use?
box fan
 

1. What is a gyroscope?

A gyroscope is a device that is used to measure or maintain orientation and angular velocity. It consists of a spinning wheel or disc that is mounted on a set of gimbals, allowing it to rotate freely in any direction.

2. How does a gyroscope produce force precession?

A gyroscope produces force precession through the conservation of angular momentum. When the gyroscope is spinning, it creates a force that is perpendicular to the axis of rotation. This force causes the gyroscope to precess, or rotate, around a different axis.

3. What is meant by "minimum gyroscope speed"?

The minimum gyroscope speed refers to the minimum speed at which the gyroscope must spin in order to produce force precession. This speed is dependent on the design and size of the gyroscope, as well as the amount of force needed for precession.

4. How is the minimum gyroscope speed determined?

The minimum gyroscope speed is determined through mathematical calculations and experiments. Factors such as the mass, shape, and moment of inertia of the gyroscope are taken into account to determine the minimum speed needed for force precession to occur.

5. Why is the minimum gyroscope speed important?

The minimum gyroscope speed is important because it determines the functionality and effectiveness of the gyroscope. If the gyroscope does not spin at the minimum speed, it will not be able to produce force precession, which is necessary for its intended use in various applications such as navigation, stabilization, and measurement.

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