Liftoff Elevator

Space Elevator — humanity's dream, older than rockets. A tether from the surface to geostationary orbit, cargo crawling upward without fuel. The problem: a tether of the required strength does not yet exist. If it were woven from talk and promises, we would have colonized the Solar System long ago. But even if one were built, unsolved problems would remain: space debris, power transmission to the climbers, vibrations.

There is another solution. Without exotic materials. Without a tether vulnerable to any impact.

Orbital Station as a Launch Track

Above the equator — a long station. Not pressurized, not habitable. Lightweight aluminum modules connected by electromagnetic damper beams, stretched along the orbit. Inside — an unmanned space, a vacuum tunnel on magnetic suspension, solar panels above it. Complete energy self-sufficiency.

Inside the tunnel, on magnetic suspension, a cart accelerates against the station's direction of travel to the speed at which it hovers motionless above a fixed point on Earth. The cart releases a tether — long, over a hundred kilometers, but such a tether is feasible. It descends, guided by correction thrusters. It does not enter the atmosphere at orbital velocity. The payload, having decelerated, lands on the upper deck of a high-altitude airship — somewhere around 12 km altitude — is exchanged for another; the new one ascends, docks with the cart, which then decelerates relative to the station and accelerates relative to Earth.

Why Maglev Works at Such Speeds

On Earth, maglev runs into three constraints — aerodynamic drag and vibrations from track irregularities. In an orbital vacuum tunnel, both vanish simultaneously. No atmosphere — no drag. No gravitational load — the cart floats in a magnetic trap without contact with the walls. The speed limit is set only by the switching speed of the electronics. The third constraint is more subtle, but on Earth one simply never reaches it — the first two are sufficient. Large magnets lack the required switching speed at such velocities, while small ones have too weak a magnetic field, especially when the tunnel is in motion and the cart may vibrate and oscillate.

The system uses a domain architecture: instead of one long coil — thousands of small independent domains, each controlled separately. A small coil — low inductance — current rises and collapses in microseconds. The full system description is here; also in the archive with calculations (Appendix 2) — a more detailed description of the domain system. https://zenodo.org/records/18779849

Flexible Structure — Because the Station Cannot Be Made Rigid

When the cart accelerates, the reaction force pushes the modules. On Earth this becomes vibration, the structure stands on a foundation. In orbit, the modules after acceleration move in the opposite direction. They move — and that is fine. Damper beams between modules average out their relative velocity, while gyroscopes on each module maintain orientation and accumulate energy.

Interplanetary Launch

The same station accelerates cargo to escape velocity. At the exit — a vector tangent to the orbit, sufficient for departure into interplanetary space. Without additional propellant. The reactive impulse from the launch simultaneously compensates for atmospheric drag on the station — the system maintains its orbit through its own transport operations, up to 20 000 launches in a year.

Where to Source the Material

Lifting this mass of aluminum trusses from Earth makes no sense. The only realistic source is the Moon. Aluminum and titanium from lunar regolith, module assembly on-site, launch by lunar mass driver. The lunar version of the station will be built first — as a means of propellant-free lunar landing, as the first instrument of deep-space missions, as a testbed for proving all the technologies.

This is a closed loop. Lunar infrastructure builds the orbital station. The orbital station makes access to space from Earth cheap. Cheap access funds the lunar infrastructure — and not only that.

Rockets will remain — for non-standard tasks, for emergencies, for open space. Like boats ferrying cargo where a bridge has not yet been built. But the mass regular flow of cargo — people, equipment, resources — will go through the Liftoff Elevator.