Originally posted by sonhouse
It would make an interesting experiment to make a small version to launch into space, say a disc 100 meters across and 1 meter thick then put into orbit say a million klicks from Earth but in the same orbit. Let it rotate in various ways, see what it would be like on Earth if the disk was 12,000 km across and some significant thickness.
I guess a planet ...[text shortened]... ble disk the size of Earth? Could it exist in reality given our laws of physics as we know them?
I am more familiar with Terry Pratchett's discworld.
I remember the concept of a space station that was a torus with people living in the hollow ring. The station rotated around its axis like a bicycle wheel, and the rotational rate was designed to provide a centrifugal force of one earth G. I believe this was depicted in Kubrick's 2001 a space odyssey. I wonder what the rotational rate would need to be for a given diameter.
Somebody's figured it out:
"In the 1950s, Wernher von Braun and Willy Ley, writing in Colliers Magazine, updated the idea, in part as a way to stage spacecraft headed for Mars. They envisioned a rotating wheel with a diameter of 76 meters (250 feet). The 3-deck wheel would revolve at 3 RPM to provide artificial one-third gravity. It was envisaged as having a crew of 80."