Artificial Gravity on the ISS

[Airbrush]

On ‎4‎/‎12‎/‎2018 at 3:04 AM, swansont said:

To get 1g at that rotation, the radius needs to be almost 40m long. The outer rim is moving 20 m/s, but you have your ~38 meter climb to transition to that speed.

That is a long distance 40m = 131 feet!  Imagine that length pressurized and shielded from cosmic rays?  What would that cost?  Then how about counter-rotating another balanced pair of sleeping modules?  You don't want them to smash into each other rotating in opposite directions.  This project seems to be way beyond affordable or practicable.  That would also be a scary place to sleep isolated so far from the hub.

Edited April 13, 2018 by Airbrush

[swansont]

19 minutes ago, Airbrush said:

That is a long distance 40m = 131 feet!  Imagine that length pressurized and shielded from cosmic rays?  What would that cost?  

That's smaller than the dimensions of the ISS, which is > 100m long

[Airbrush]

"...A 2011 NASA proposal for a demonstration project preparatory to the final design of the larger torus centrifuge space habitat for the Multi-Mission Space Exploration Vehicle. The structure would have an outside diameter of 30 feet (9.1 m) with a ring interior cross-section diameter of 30 inches (760 mm). It would provide 0.08 to 0.51g partial gravity. This test and evaluation centrifuge would have the capability to become a Sleep Module for ISS crew."

https://en.wikipedia.org/wiki/Artificial_gravity#Proposals

I guess 0.51g is better than zero g.

[John Cuthber]

9 hours ago, Airbrush said:

and shielded from cosmic rays? 

Unless it takes you are really long time to get to bed, that's not a critical requirement.

Edited April 14, 2018 by John Cuthber

[Airbrush]

On ‎4‎/‎13‎/‎2018 at 5:37 PM, John Cuthber said:

Unless it takes you are really long time to get to bed, that's not a critical requirement.

If you are climbing down a ladder over 100 feet, wearing only your pajamas, you would hope the tunnel walls are thick enough to block micro-meteors and cosmic rays.  I'd rather sleep in zero g in the thickest, most shielded module of the space station.