Saving energy is silly; the bottom line is money (was Forklifts tip

I understand the vectors, in fact, I once proposed hanging a bunch of
gravitationally coupled solar sails ahead of the earth to move the
earth back from the sun (over geological time).

The problem with a power satellite is it is in orbit around the
*earth.* And the force on the satellite is radially out from the sun
in all places on its orbit around the earth. If you tilt the power
sat, the non radial force against orbital motion on the near side of
the earth toward the sun is opposed when it is on the far side of the
earth from the sun. And changing the tilt of something that big over
a short time is going to take an awful lot of reaction mass or some
heavy other method.

The force egg shapes the power sat orbit, which is not good for it
staying in the same place over its rectenna.

There is computer code to analyze this dating back decades, but I have
not located a working copy yet.

Keith