Artifical gravity on spaceships

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Discussion Overview

The discussion revolves around the concept of artificial gravity in spaceships, particularly through the use of rotation. Participants explore the implications of rotating habitats, the challenges of maneuvering, and the effects of Coriolis forces. The scope includes theoretical considerations, design challenges, and speculative ideas for science fiction applications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose that rotation is the only feasible method for creating artificial gravity, while others question the energy requirements for maintaining constant acceleration.
  • Concerns are raised about the effects of rotation on maneuverability and the potential need for detached living habitats to avoid affecting the ship's rotation.
  • There is discussion about the Coriolis force and the idea of using counter-rotating cylinders to mitigate its effects.
  • Some participants suggest that a living ring should have a significant radius to prevent motion sickness, while cargo areas can be smaller.
  • Questions are posed about the possibility of shifting the axis of a rotating ship without using thrusters, with some proposing internal weight movements as a solution.
  • Participants discuss the conservation of angular momentum and how it relates to maneuvering a rotating ship, including the use of gyros for reorientation.
  • There are considerations about the design of the ship, including the use of independent spinning wheels and the implications for gravity distribution within the ship.
  • Some express skepticism about the practicality of ion thrusters for long-duration space travel due to their low power output.

Areas of Agreement / Disagreement

Participants express a range of views on the feasibility and implications of various designs for artificial gravity. No consensus is reached on the best approach, and several competing ideas remain unresolved.

Contextual Notes

Participants highlight limitations such as the need for airtight joints for rotating components and the potential for motion sickness due to gravity variations in rotating systems. The discussion also reflects a lack of existing practical implementations of these concepts.

Who May Find This Useful

This discussion may be of interest to those involved in aerospace engineering, science fiction writing, or anyone curious about the challenges of creating artificial gravity in space travel.

  • #61
We don't know. 1g and 0g are the only points where we have long-term data.
 
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  • #62
trainman2001 said:
It doesn’t have to be 1g, does it? How much below 1g would humans still be able to retain normal biological functions and musculoskeletal integrity. It would be considerably less energy to accelerate at 1/3 g than 1g, or to spin a habitat to that level. It all depends on what we need to thrive over the long haul. Living on Mars or Moon at their reduced gravities would tell us a lot.
It's likely that physiological effects vary with g (maybe even proportionally), but there are many practical reasons why partial g might be of value. Just the part about everything not physically attached to a wall floating away is a big issue.
 
  • #63
I think another big plus would be the accomodation of natural bodily functions. I get the impression that zero-gee toilets are not for the faint of heart.
 
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  • #64
russ_watters said:
It's likely that physiological effects vary with g (maybe even proportionally), but there are many practical reasons why partial g might be of value. Just the part about everything not physically attached to a wall floating away is a big issue.
Variable gee would be useful for outbound and homebound voyages from Mars where the acclimation could be done gradually and naturally each way.
 
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