Foldable artificial gravity system!

[minerbat]

SpaceX should totally use this on starship lol...

Edited May 29, 2021 by minerbat

[jimmymcgoochie]

I doubt we'll see centrifugal artificial gravity any time soon- to generate enough gravity for it to be worthwhile would require either a small centrifuge spinning very rapidly (a 10m radius would need just over 5rpm to get 0.3g, but if you were standing in that your head would only get about 0.25g and just standing up or sitting down could make you dizzy), or a much larger centrifuge spinning slowly (we're talking 70m radius for 0.3g at 2rpm, or nearly 300m at 1rpm) which would be prohibitively heavy for anything but a truly enormous interplanetary ship. There's also the mechanical strain of spinning up or slowing down that much mass or just holding it all together, you can't really make any course changes or attitude adjustments with a centrifuge deployed and spinning, there's a lot more surface area to cover with radiation and micrometeorite shielding etc. and a lot more volume to keep at a pressure, temperature and atmospheric composition that's compatible with humans, etc.

And that's only for Mars gravity, which is about as low as you can go before getting bone and muscle losses- to get full Earth gravity would be even more difficult.

[Single stage to ocean]

Just long tethers made of Kevlar and really light habitation pods could do this. I think an astronaut could handle the space journey if they made it the size of the Etihad Residence, and more space for food and etc.