Loopy space elevator concept

Tom James @ 27-05-2009

rotatingspaceelevatorsIn the same general theme as Keith Loftstrom’s launch loop concept [via Speaktomanagers] we have the Rotating Space Elevator:

Golubović and Knudsen have introduced the Rotating Space Elevator (RSE), a rotating system of a floppy string that forms an ellipse-like shape. Unlike the traditional Linear Space Elevator (LSE) made of a single straight cable at rest, the RSE rotates in a quasi-periodic state.

“The idea came by itself,” Golubović told PhysOrg.com. “I was thinking how to make things move easily and quickly up the traditional Tsiolkovsky-type space elevators. In my kitchen, I was mixing coffee in my cup too vigorously and the centrifugal force on the rotating coffee won over gravity to make some of the coffee lift and splash out the cup. This was my ‘eureka’ that lead to adding a similar conceptual feature to the old space elevator idea…

[via Next Big Future][image from Physorg]


Maglev + space elevators + Moon = Big Dumb Object

Tom James @ 16-03-2009

moonA classic Big Dumb Object is discussed in Short Sharp Science: a space elevator combined with a maglev launcher to propel prospective lunar colonists into orbit:

The lunar elevator doesn’t actually reach the regolith. Instead, the elevator ribbon ends 10 kilometres shy of the lunar surface so that no lunar mountain peaks hit the end, or terminus, of the orbiting elevator.

So how do astronauts make that 10 km jump to the elevator’s dangling tail? Easy: as the terminus passes overhead, they are fired in a magnetically levitated train along a track that’s been laid across the lunar plain and which gradually eases upwards to become vertical.

If they are fired at just the right time – and I wouldn’t like to be the person specifying or writing the software to do that, they are caught by some kind of robotic grappler at the terminus, which attaches the train to the ribbon.

[image from Hamed Saber on flickr]