Gyroscope Experiment Apparatus

Quick Answer: The Gyroscope Experiment Apparatus is a spinning rotor held inside gimbal rings on a pillar stand. Once the rotor is spun up, students can turn and tilt the stand while the rotor’s axle keeps its direction, and apply a small push to see precession, the two effects at the heart of gyroscopic motion.

A Rotor Free to Keep Its Direction

The listing image of the gyroscope experiment apparatus shows a rotor carried inside a pair of rings, supported on a vertical pillar that rises from a round, weighted base. Each ring pivots on its own axis. That arrangement, called a gimbal mounting, means the frame can be turned or tipped around the rotor without twisting the rotor’s axle, so what students see is the rotor’s own behaviour and not the movement of their hands.

A spinning rotor carries angular momentum along its axle, equal to its moment of inertia multiplied by its rate of spin. Changing the direction of that angular momentum needs a torque, and the change happens in the direction of the torque rather than the direction of the push. Two observations follow. Tilt or rotate the stand and the axle goes on pointing the same way in space, a property called rigidity in space. Press gently on the inner ring and, instead of tipping, the ring swings off at right angles to the push; that sideways motion is precession, and it becomes quicker as the rotor slows down.

Rigidity in space is the principle of the gyrocompass and of the attitude indicator in an aircraft cockpit, and gimbals were long used in inertial guidance. Unlike a hand-held Bicycle Wheel Gyroscope, where students feel the forces in their arms, this mounted gyroscope is for watching the axle and the rings. The rotor size, and whether a pull cord or string is supplied for spinning it up, should be confirmed when ordering.

Applications

• Showing rigidity in space by turning and tilting the stand under a spinning rotor
• Producing precession by applying a light, steady push to the inner ring
• Explaining gyrocompasses, aircraft attitude indicators and spacecraft orientation
• Relating spin rate to stability in rotational dynamics lessons

Specifications

Care & Handling

• Hold the base firmly while spinning up, and keep fingers and loose sleeves clear of the rotor.
• Pull a spin-up cord straight out along the direction it was wound; a sideways jerk strains the bearings.
• Let the rotor run down by itself or slow it with light friction on the frame; never grab the spinning rim.
• Store the apparatus upright with the rings resting freely, since a bent ring will rub against the rotor.

Why Choose LabEquip

Physics teachers in senior secondary schools and college mechanics labs choose a gimbal gyroscope when they want a whole class to see angular momentum at work rather than read about it. LabEquip lists it among its STEM kits range of mechanics demonstrations, and you can raise questions about the rotor or spin-up method through our contact page.

Frequently Asked Questions

Why are the gimbal rings important?

The rings let the frame move around the rotor without applying a twisting force to the axle. The spinning rotor therefore keeps its axle pointing in the same direction in space while the stand is tilted or turned, which is the property used in gyrocompasses.

What happens when the inner ring is pressed gently?

The ring does not tip in the direction of the push. It swings off at right angles instead, because the torque changes the direction of the rotor’s angular momentum sideways. This slow turning of the axis is called precession.

Why does the gyroscope become easier to disturb as it slows?

Angular momentum is proportional to the spin rate. As the rotor loses speed it has less angular momentum, so the same torque turns its axle more quickly, precession speeds up and the rotor soon behaves like an ordinary unspun object.

What is nutation?

Nutation is a small nodding wobble of the spin axis that appears on top of precession, usually just after the gyroscope is released or knocked. It dies away through friction, and it is faster and smaller when the rotor spins quickly.

How is the rotor spun up?

In the usual design a cord is wound round the rotor axle and pulled out briskly and steadily while the frame is held still. A faster spin gives longer and clearer demonstrations, so several practice pulls are worthwhile.

How does this differ from a bicycle wheel gyroscope?

A gimbal gyroscope isolates the rotor so students can watch the direction of the axle and the motion of the rings. A bicycle wheel gyroscope is held by its handles, so the student feels the resistance to tilting directly in the arms.

Last Updated: September 2026