An amazing physics toy...

This spinning top was originally designed by the Scottish physicist James Clerk Maxwell over 100 years ago as a device to demonstrate the strange properties of rotating bodies to his physics students. Specifically, Professor Maxwell wanted to be able to show, as convincingly as possible, that a gyroscope will always react at 90 degrees to an applied force.

When this massive brass bell-shaped top is spinning an interesting stability can occur - push on the stem with an object (like a pencil) and the top will push back, forcing the stem against that object, and friction will cause the stem to roll along and trace the edge of the object.

In this design the stem will trace along the edge of a metal spiral, clinging to it like a magnet - but magnets are NOT involved here. The key to this design is to make the contact point/tip of the top at its own centre of mass, then any frictional force in contact with the stem will produce a torque about the contact point at right angle to the direction of friction that creates the stabilizing force (students of physics may recognize application of the right hand rule here). An extreme physics toy! 

If you look closely, you will see a slight difference in behaviour, depending on which direction you spin the top. Spin it in one direction and the metal tip holds closely to the spiral as it reaches the centre, and switches to the other side of the spiral. Spin it the other way and the metal tip separates briefly from the spiral, when it reaches the centre. 

THIS ITEM REQUIRES SOME ASSEMBLY. 

Assembly will take 10-15 minutes. There are six screws, all of which are fastened with the supplied Hex key (Allen key). Full instructions enclosed.  

NOTE - our video shows the red Maxwell Top - we have not filmed the black one yet.