Oh ! martin, if you'd like to have something to consider that might be new to you, try this, I've been working it over for a couple of years now and came up with some parts of it, but, the more the more likely.
If you had an means of causing a counter revolution against the earths revolutionary direction, at the point it went one revolution faster, you would have null g.
You would have to put such a thing into a Gimbel stanchion, base, with adequate sensors so it could keep true equatorial plane with the earth through the seasons and what not, that our you'd end up with human jelly all over the walls. so null G would and could be sustained. Direction propulsion could be of a means to repulse the magnetic fields of the earth, though with the sun spots and such that is not the best solution. There has to be another better suited to the task.
I've looked into designs of centrifuges but the lack the stability and speed, a super collider would do it, but I doubt you could shrink one enough, though maybe?
anyway, what I am thinking of is gravitational lift and planetary propulsion based upon the magnetic fields criss crossing the planet.
might sound silly, I guess it does sound silly, but at the same time I think possible...
