Power formula for space navigation, MHD propulsion Refer

[soliris]

TL;DR

Power = budi
Extended power formula for space navigation with MHD propulsion, considering that planet Earth owns such an engine..

Hello

Interested in MHD propulsion, I thought this power formula in watts, inspired by the Lorentz force, might be useful:
P = B.U.D.I,
where B = Tesla magnetic field, U = rotational speed, D = diameter of a rotating magnet, and I = intensity of the injected electric current.
The model used here, I admit, is that of planet Earth, which seems to possess such an internal engine!

What do you think?

 

[Baluncore]

While MHD may be important for ionic particles suspended in the atmosphere, the Earth's magnetic field is probably insufficient to keep a juggler's balls in the air.

What were you thinking of navigating through space ?
The Earth's magnetic field might be distorted by the object's mass.