The discussion revolves around the minimum speed required for a gyroscope to exhibit force precession, specifically how an applied force at 0 degrees can result in movement at 90 degrees. Participants explore the relationship between gyroscope speed, angular momentum, and the observable effects of precession.
Participants express differing experiences regarding the visibility of precession in various devices, with no consensus on the minimum speed or conditions necessary for observable precession.
Participants reference the relationship between angular momentum, input torque, and the moment of inertia, but the discussion does not resolve the specific conditions or parameters required for precession to be observed in different scenarios.
Any non zero speed will have the 90deg offset for a small input torquerichengle 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.
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.
The moment of inertia depends on the mass and its distribution. With a fan you additionally have aerodynamic effects.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?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?
box fanLnewqban said:What kind of fan did you use?