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Wild idea: build one on earth to simulate 1.1G (or higher; whatever would still be comfortable) and put gyms, hotels, swimming pool, living quarters, etc. in it. Being in it for extended periods of time would build up muscles and bones. That would likely be something that fitness people and professional athletes would be interested in. And it's a good dry run for building and operating these things on Mars and the Mo…
The acceleration needed to make a turn with radius r at speed v is. v²/r ( https://courses.lumenlearning.com/suny-physics/chapter/6-2-c... ) If that combined that with earth’s gravity has to give you 1.1g, that has to be (via the Pythagorean theorem) about 0.2g or 2m/s². Let’s pick r = 100m . Then, v² has to be 20, giving as a velocity of about 16 km/hour. r = 1km would require about 50km/hour. Sounds doable, until y…
Re: Horizontal running inside circular walls of Moon settlements
#151That's why I proposed using a train. Minus the swimming pool, totally doable to have one driving around at relatively low speeds. We use trains to move many tonnes of cargo around already. So, I don't see the mass as a show stopper.