A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Space Science » Technology
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

artificial gravity a different idea...maybe?



 
 
Thread Tools Display Modes
  #41  
Old August 26th 03, 03:32 PM
Theodore W. Hall
external usenet poster
 
Posts: n/a
Default artificial gravity a different idea...maybe?

Christopher wrote:

For healthy space exploration and habitation you need 1 g
environments.


There's plenty of evidence that 1 g is sufficient (assuming
a normal healthy life style, not confined to bed), and 0 g
is not sufficient.

Between 0 and 1 g, there's no data. Except for a few man-days
on the moon, there's virtually no experience of living in
partial g. Probably, something less than 1 g would suffice,
especially if coupled with appropriate exercises and other
countermeasures to deconditioning. But nobody really knows.

Billions of dollars have been spent on microgravity life science,
looking for such countermeasures, with very limited success. I
wish some portion of that budget would be invested in a real
space-based artificial-gravity test bed.

--

Ted Hall
  #42  
Old August 27th 03, 04:53 AM
Richard Lamb
external usenet poster
 
Posts: n/a
Default artificial gravity a different idea...maybe?

free fall basket ball



"Johnson.." wrote:

Hi Folks
Just joined the group for the purposes of posting an idea.

I have been doing a little reading today about artificial gravity and
haven't seen magnetism mentioned at all. This may sound stupid but couldn't
the floor of a spacecraft be magnetized and the crew wear suits that would
be attracted to that floor?

It would be more practical in a spacestation, which runs on photovoltaic,
cause the electro magnetic floor would be a drain on electricity.

Please let me know what you think.

  #43  
Old August 28th 03, 04:29 PM
Randall R Schulz
external usenet poster
 
Posts: n/a
Default artificial gravity a different idea...maybe?



Gordon D. Pusch wrote:

Possibly the little detail that the "cylindrical surface" needs to
be about a =MILE= in diameter to get the rotation rate down below 1
rpm @ 1 gee, since if it rotates faster than 1 rpm, the majority of
human beings tested upchuck. (Even at 1rpm, a significant fraction
of the people tested upchuck; you need to get the rotation rate
down to about 0.25 rpm in order for the general population to not
upchuck.)


How much up can an upchuck chuck when an upchuck does chuck up?

Enquiring minds want to know.


-- Gordon D. Pusch



RRS
  #44  
Old September 2nd 03, 07:34 AM
Theodore W. Hall
external usenet poster
 
Posts: n/a
Default artificial gravity a different idea...maybe?

Roger Stokes wrote:

"Theodore W. Hall" wrote in message
...
I wish some portion of that budget would be invested in a
real space-based artificial-gravity test bed.

Has it been formally proposed to NASA and turned down, or not proposed at
all?


Sure, lots of people have proposed lots of things to NASA, but
NASA doesn't set its own budget or goals. It's at the mercy of
Congress and the Administration. Politicians are prone to
proclamations about space policy and goals without understanding
anything of the technical issues. They won't propose anything
that specific, nor understand it if it's proposed to them.

NASA and its contractors have done lots of paper studies
artificial gravity, but none of them have gotten past ground-based
centrifuge experiments and conceptual design of space hardware.
Artificial gravity has not been part of any funded mission.

Here are some technical / historical references:

Kramer, Saunders B.; Byers, Richard A. (Lockheed Aircraft
Corporation) (1960). "A Modular Concept for a Multi-Manned
Space Station." _Proceedings of the Manned Space Stations
Symposium, April 20-22, 1960_, p. 36-72. Institute of
the Aeronautical Sciences.

Hill, Paul R.; Schnitzer, Emanuel (NASA Langley) (1962).
"Rotating Manned Space Stations." _Astronautics_, vol. 7,
no. 9, p. 14-18, September 1962. American Rocket Society.

Berglund, Rene A. (NASA Langley) (1962). "AEMT Space-Station
Design." _Astronautics_, vol. 7, no. 9, p. 19-24, September
1962. American Rocket Society.

Kurzhals, Peter R.; Adams, James J. (NASA Langley) (1962).
"Dynamics and Stabilization of the Rotating Space Station."
_Astronautics_, vol. 7, no. 9, p. 25-29, September 1962.
American Rocket Society.

Normyle, William J. (1969). "NASA Aims at 100-Man Station."
_Aviation Week and Space Technology_, vol. 90, no. 8, p. 16-17,
February 24, 1969. McGraw-Hill.

NASA Office of Manned Space Flight (Advanced Manned Missions)
(1970). "Artificial Gravity Experiment Definition Study."

Schultz, David N.; Rupp, Charles C.; Hajos, Gregory A.; Butler,
John M. (1989). "A Manned Mars Artificial Gravity Vehicle"
(AAS 87-203). _The Case For Mars III: Strategies for
Exploration - General Interest and Overview_, p. 325-352.
Edited by Carol Stoker. American Astronautical Society.

Staehle, Robert L. (1989). "Earth Orbital Preparations for Mars
Expeditions" (AAS 87-205). _The Case For Mars III: Strategies
for Exploration - General Interest and Overview, p. 373-396.
Edited by Carol Stoker. American Astronautical Society.

Lemke, L. G.; Welch, R. B. (eds.) (1988). "Workshop on the Role
of Life Science in the Variable Gravity Research Facility."
NASA Ames Research Center, March 27-30, 1988.

Lemke, L. G. (1988). "VGRF Technology Overview and Strawman
Design." NASA Ames Research Center, March 27, 1988.

von Puttkamer, Jesco (1985). "The Long-Range Future." _Space
Stations and Space Platforms - Concepts, Design, Infrastructure,
and Uses_, p. 355-384. Edited by Ivan Bekey and Daniel Herman.
American Institute of Aeronautics and Astronautics.

I would argue that an artificial-gravity test bed would have been
a better use of the life science money spent on ISS. I would
argue that an artificial-gravity test bed should be a prelude to
a crewed mission to Mars. But I suppose that discussion belongs
in news:sci.space.policy

--

Ted Hall
  #45  
Old September 4th 03, 08:16 AM
Theodore W. Hall
external usenet poster
 
Posts: n/a
Default artificial gravity a different idea...maybe?

JamesStep wrote:

... I remember reading years ago that NASA experimented
with magnetic and/or velcro footwear in Skylab (or perhaps
it was on the "vomit comet" aircraft) and found that while
it sounds good in theory, it just didn't work very well.


The "floor" in Skylab was a sort of triangular grid, and the
astronauts had shoes designed to lock into it. It was a
nice try, considering there was no prior experience with
weightless living in such a large volume or for such a long
duration. As you say, it sounded like a good idea at the time,
but in the end it didn't work very well. It was difficult for
the astronauts to lock into the grid with no weight to hold
them down. As soon as they pressed against the grid, they
would inadvertently shove off. They gave up on the fancy
footwear; they learned to work without it.

--

Ted Hall
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
SPACE STATION IDEA Jay Space Station 1 November 22nd 03 01:10 PM
Relevancy of the Educator Astronaut to the Space Program stmx3 Space Shuttle 201 October 28th 03 12:00 AM
artificial gravity Johnson.. Space Station 7 August 22nd 03 05:48 AM
"Big Rip" has problems with Thermodynamics ! Morenga Science 9 August 20th 03 02:22 PM
Oceanographers Catch First Wave Of Gravity Mission's Success Ron Baalke Science 13 August 7th 03 06:24 AM


All times are GMT +1. The time now is 12:12 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 SpaceBanter.com.
The comments are property of their posters.