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Space Elevator Design Challenges (2D)

A 2D tension-balance model of a geostationary space elevator: tune counterweight mass and distance against a climbing payload's mass and speed, and watch the anchor tension swing between taut, near-limit and slack as gravity and rotation fight along the cable.

Space & Astronomy2DAdvanced60 FPS⇄ 3D version

This 2D companion reduces the space elevator to its core tension balance: a climber (adjustable mass and speed) rides a cable stretched between Earth's surface and a counterweight (adjustable mass and orbital distance). At every instant the sim computes each mass's net radial force — gravity pulling in, rotation flinging out — and sums them to find the tension an anchor at the surface must hold. Below geostationary orbit gravity wins and the cable must support weight; beyond it rotation wins and the cable is pulled taut from above. Push the counterweight too light or too close and the tension goes negative — the cable goes slack — which is exactly the design trade-off real space-elevator concepts have to solve.

⚙ Under the hood

A 2D tension-balance model: for each mass, net force = gravity (GM·m/r²) minus centrifugal force (m·ω²·r); the anchor tension is the negative sum of the climber's and counterweight's net forces, so it flips from slack to taut as the counterweight's mass and distance past geostationary orbit dominate the climber's weight.

space elevatororbital mechanicscable tensiongeostationary orbitcounterweight2D

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install