Precession More

Continuing from the post "Precession Under Zero Gravity" with precession, it is interesting that when the spinning disc is precess-ing in the anti-clockwise direction with a velocity component out of the paper shown in the diagram below,

a force, $F_{gB}$ is created that lifts the disc towards the vertical axis.  The vertical component of  $F_{gB}$ acts against gravity and is the force that keeps the spinning disc from toppling over.  The horizontal component of $F_{gB}$ is the centripetal force that spins the disc about the verticle axis.  An anti gravity-stunt. This precession anti-clockwise was due to a tendency to drop under gravity in the first place (post "Precession Under Zero Gravity").

When the disc is made to precess in a clockwise direction, ie a velocity component into the paper as shown below,

a force $F_{gB}$ develops that causes the disc to drop further away from the vertical axis.

In both cases,

$F_{gB}=\pi v\times g_{B}$  per unit mass.

This force is a due to $g_{B}$, the $B$ field analogue of gravity and velocity $v$, transversing $g_{B}$.

When the disc is spinning vertically, its axis in the horizontal position, and made to precess in the anti-clockwise direction, we may have an anti-gravity device,

where $F_{gB}$ acts against gravity vertically.