question, sensei :

if you lift a platform over 10km what are the chances it gets stuck in the middle vibrating a bit bc its neither hot nor cold enough to keep going up or down - which comes down to the same thing and even if wheres motion there is energy the return might not warrant constructing a ten km high thermo-insulated tube thats tensile enough to stand the climate around it poking and pulling

at what height does it lose weight

i mean pressure to the point it stops going up ....

without the numbers ... neo-deutsch style ... it seems unlikely the universe herself would be so negligent as to leave a loophole where it says : here you dont lose energy to the point where you can get it without adding labour (or work) and we bumped into it

barring theoretical vacuums in a perfect world, superconductors and perfect insulation

and maybe supermats that change weight and mass depending on air pressure and altitude :p

thats definitely catstar tek

i still think maglev is the best shot

the force is STRONG !

even the railguy

https://newatlas.com/startram-maglev-to-leo/21700/

https://phys.org/news/2012-03-maglev-track-spacecraft-orbit.html

not necesserily an alternating right-up vertical one that pushes it over the next magnet before turning that one (catstar ?)

but at any rate

maybe the indians could pull off the pendulum

the rest seems something only the chinese or arabs could whip up atm