A different kind of SBSP

--- In spacesettlers@yahoogroups.com, "hitssquad" wrote:
>
> --- In spacesettlers@yahoogroups.com, "brooksn" wrote:
> > --- In spacesettlers@yahoogroups.com, "hitssquad" wrote:
> > > --- In spacesettlers@yahoogroups.com, "brooksn" wrote:
> > > > > > > The wind would still blow the sails sunward at the 6AM side of the planet, and cosmosward at the 6PM side of the planet.
> > > > > > Why would the wing blow it sunward and cosmosward at those times?
> > > > > ...Because the earth spins
> > > > you were describing a non orbiting satellite stationary to the Sun-Earth system
> > > Yes. That's why the average speed of the wind hitting the sail-mirror is 538 m/s at an altitude of 1,000 km above the equator. The sail-mirror is stationary, but the earth is spinning.
> > I don't think there is enough force from the limited air molecules to provide enough lift to counter the gravity of the Earth.
>
> It's a solar sail. The force-stream it rides to stay in position comes from the sun. The 538 m/s average-speed wind blowing on it is unhelpful.

Ah, the gravity exerted on the satellite is estimated at 3 million lbs, the pressure on the surface from the sun of the 78 km2 is 36,620 lbs. So you would need to increase the altitude dramatically or surface area without increasing weight or reducing weight with the same surface area.
Brooks