Help me with the physics

Mmmm another good one... :)

Something I always been thinking is to use balloons to take vectors up to
the very limit of the atmosphere and then ignite from there... I wonder why
is not done, surely would save a lot of fuel?
I guess the problem is to get the balloon where you want it at the right
time...?

Of course now that nanotubes technology is making cables up to orbit a
practical possibility I'm rethinking the design, forget about rockets
altogether!
Have a satellite in geostationary orbit dragging a cable down to the limit
of upper atmosphere, attached to a permanent balloon station. You can lift
any amount of weight nearly for free up to the station and from there pull
it up by cable. Much better than having a cable going all the way down to
ground, especially if the cable breaks! :)

Problem is turning off that nasty current that has the annoyingly habit to
blow at 120mph up there, but sure there will be a solution for that... any
meteorologist on the list? :)

Cheers,

Claudio