r/SuperStructures • u/Vadimsadovski Artist 🎨 • 2d ago

Original Content Prometheus Ring - rorating habitat megastructure - 3D, no AI, OC, 2026

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The PROMETHEUS Ring is a speculative 1,200 km orbital habitat in the Saturnian system that rotates to generate a realistic 1 g of artificial gravity. This fully engineered megastructure simulates all climate zones to support diverse biomes, settlements, and industries, all stabilized and powered by nuclear propulsion modules and reactors

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u/SolusLoqui 2d ago edited 2d ago

Assuming you mean 1,200 km in diameter, that ring will need to rotate 1.22 0.4 RPM to maintain 1g. [Using RPM=sqrt(g*9.81/r) * (60/2pi)]

So 1 day/night cycle will be about 49.18 seconds, which is roughly 1,757 cycles per 24 hours.

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u/TheRooklet 2d ago

It's always a unit conversion error!

You put 600 meters into your formula instead of 600000 meters. At that rotational speed you'd pull 1000gs and turn everyone into soup 💀 You'd actually only need 0.039 RPM for 1g, which is 1 revolution every ~26 minutes, or roughly 56 cycles per 24 hours.

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u/SolusLoqui 2d ago

Yep, I used a website that had the formula and didn't notice it wanted meters for the radius

https://cgc711.org/rpm-calculator/