Gyroscope
The gyroscope was named by Leon Foucault, a French physicist, in an attempt to demonstrate the earth's rotation. A freely rotating disk, called a rotor, was mounted on a spinning axis in the center of a larger, stable wheel. As the earth spun on its axis, the stable wheel rotated with it, but the rotor did not move. The movement of the mounted wheel followed the rotation of the earth, rotating around the center disk and demonstrating the earth's spin.
In addition to the rotor, modern gyroscopes typically have two additional rings, called gimbals, in the center of a larger stable ring. The rotor spins on an axle connected to the smaller, inner gimbal. This gimbal rotates on a horizontal axis created by its connection to the larger, outer gimbal. The larger gimbal rotates vertically and spins on an axis connected to the stable outside ring.
Gyroscopes are in compasses for airplanes, spacecraft, and boats. In airplanes, the pitch and orientation of the airplane is measured against the steady spin of the gyroscope. Massive gyroscopes are used to stabilize large boats and some satellites.
In addition to the rotor, modern gyroscopes typically have two additional rings, called gimbals, in the center of a larger stable ring. The rotor spins on an axle connected to the smaller, inner gimbal. This gimbal rotates on a horizontal axis created by its connection to the larger, outer gimbal. The larger gimbal rotates vertically and spins on an axis connected to the stable outside ring.
Gyroscopes are in compasses for airplanes, spacecraft, and boats. In airplanes, the pitch and orientation of the airplane is measured against the steady spin of the gyroscope. Massive gyroscopes are used to stabilize large boats and some satellites.












