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#1 2025-01-18 17:44:42
- tahanson43206
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- Registered: 2018-04-27
- Posts: 20,963
Non-Rotating Space Transport with Rotating Feature
This topic is offered to provide a venue for Terraformer to specify the features to be included in a deep space transportation system.
This particular topic very specifically does NOT involve rotation of the space vessel itself.
The simulated gravity equipment can be inside or outside the vehicle.
There are multiple deep space transportation systems in play in (and outside of ) the forum.
This topic will (with any luck) showcase the unique perspective and insights that Terraformer brings to the forum.
However, the topic itself is intended to be flexible enough to accept ideas contributed by members that meet the basic criteria.
Basic Criteria:
1) The ship itself will not rotate.
2) The feature ** must ** support 1 G delivered to the full body of human subjects
Interpretation: The G force must be no less than 1 G wherever measured on the human body.
3) The feature must be 'practical' in some sense.
We have differing interpretations of the word "practical" in this forum, so I'll add a definition for this topic:
Practical artificial gravity feature:
1) The feature will work in the Real Universe
2) Someone will pay for it
3) Someone will use it
Title was updated 2025/01/19 to clarify that in ** this ** topic, the ship does not rotate.
The ship-does-not-rotate rule allows for a wide range of simulated gravity options of varying sizes and capabilities.
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#2 2025-01-18 17:47:20
- tahanson43206
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- Registered: 2018-04-27
- Posts: 20,963
Re: Non-Rotating Space Transport with Rotating Feature
This post is reserved for an index to posts that may be contributed by NewMars members over time.
This is intended to be a topic that leads to success and implementation of a solution in the Real Universe.
Contributions to support ideas presented here are both expected and welcome.
GW Johnson Spreadsheet and User Manual for Rotation:
https://newmars.com/forums/viewtopic.ph … 12#p229212
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#3 2025-01-18 17:51:30
- Terraformer
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- From: The Fortunate Isles
- Registered: 2007-08-27
- Posts: 3,969
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Re: Non-Rotating Space Transport with Rotating Feature
2) is unreasonable. That mandates massive centrifuges, since your head is always going to be 1.5-2m closer to the axis of rotation if you're standing up. Rules out short axis gyms. Or means you can only do lying down excercises, which is not what we need.
Use what is abundant and build to last
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#4 2025-01-18 21:30:53
- tahanson43206
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- Registered: 2018-04-27
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Re: Non-Rotating Space Transport with Rotating Feature
GW Johnson provided a spreadsheet and a User Manual to study rotation for artificial gravity.
https://newmars.com/forums/viewtopic.ph … 12#p229212
Update: GW did a quick analysis of the head-two difference, and found that for large radii such as needed for 3 RPM, 4 RPM or even 5 RPM, the difference is so small as to be difficult for a human to detect.
On the other hand, for short radius rotation, the difference becomes quite noticeable indeed.
In any case, the calculator tool offers promise to be able to answer any questions our members may have.
As a reminder: We have the possibility of a tutorial on the new calculator this Sunday evening during the weekly NewMars Google meeting.
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#5 2025-01-19 11:40:41
- tahanson43206
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- Registered: 2018-04-27
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Re: Non-Rotating Space Transport with Rotating Feature
The title of this topic was revised to indicate that the space vessel itself will not rotate.
Rotating designs:
The Large Ship design in development by RobertDyck assumes the entire ship rotates. No mass is allocated to simulated gravity.
The Baton design of GW Johnson rotates the entire vessel, but the mass of the vessel is least of all the designs on offer at this point (January 2025)
GW's design allocates no mass to simulated gravity equipment. What GW's design ** does ** require is enough mass to secure the modules when the ship is rotating, and a docking port for a navigation companion vessel/drone.
Non-Rotating designs:
Designs by:
kbd512 (500 passengers)(dual counter-rotating rings)
GW Johnson (38 (or so) crew) (dual counter-rotating rings)
tahanson43206 (44 crew) (dual IN-LINE counter-rotating rings)
all assume the rotation equipment is inside the hull of the vessel.
A characteristic of all the designs listed above is that they provide an experience that is reliable, persistent and available to everyone at all times.
A tradeoff is that these are all physically large vessels,
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