Greetings: There is so much good stuff on RF Cafe that there is no way to list or
link to all of it here. Please use the Search box or the Site
Map to find what you want - there is a good chance I have it. Thanks!
Gyroscopes have always
fascinated me. Even after taking engineer physics classes and learning the principles, I still find it amazing
that the momentum of a spinning, stationary object will resist an attitudinal perturbance. This video demonstrates
the ability of a gyro to hold up a relatively heavy mass, and the resulting precession. It is the same phenomenon
that causes the Earth's 26k-year cycle of the
precession of the equinoxes.
Also demonstrated is nutation, which is the same kind of wobble that occurs with our moon that causes a slight
variation in the lines between the light and dark sides. It has the period of a lunar orbit. The Earth also
experiences nutation, but its period of 18.6 years is barely noticeable.