1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.
My Hobby Website:
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.