Dust - Revision history

Farred: addition

2016-08-09T22:24:04Z

addition

2016-08-09T16:06:00Z

add link

2013-08-13T04:29:19Z

fix typo

2007-06-10T15:19:48Z

ref

2007-06-10T15:16:21Z

The Response:: ref

2007-04-02T03:07:13Z

Layers in the Regolith: slight reword of the brazil nut analogy

2007-04-02T01:26:43Z

2007-04-01T20:41:45Z

interwiki link to exd:micron

2007-04-01T12:00:01Z

Protecting Living Space

2007-04-01T11:50:47Z

Dust can unintentionally be moved by people

← Older revision		Revision as of 22:24, 9 August 2016
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	Sandbags full of regolith will be very useful devices for providing radiation and thermal protection. They will have to be made in such a way so that they will not leak dust and can be filled by robots.		Sandbags full of regolith will be very useful devices for providing radiation and thermal protection. They will have to be made in such a way so that they will not leak dust and can be filled by robots.

−	Outside robots will probably need to wear coveralls or full [[Robots in Space Suits\|space suits]] to help keep their insides free of dust and to provide a stable temperature.	+	Outside robots will probably need to wear coveralls or full [[Robots in Space Suits\|space suits]] to help keep their insides free of dust and to provide a stable temperature. Hydraulic pistons could be completely inside space suits covering robotic machines or the pistons could be covered by stretchable accordion pleated sleeves with gas tight connections to the machine above and below the pistons.

← Older revision		Revision as of 16:06, 9 August 2016
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	Sandbags full of regolith will be very useful devices for providing radiation and thermal protection. They will have to be made in such a way so that they will not leak dust and can be filled by robots.		Sandbags full of regolith will be very useful devices for providing radiation and thermal protection. They will have to be made in such a way so that they will not leak dust and can be filled by robots.

−	Outside robots will probably need to wear coveralls to help keep their insides free of dust and to provide a stable temperature.	+	Outside robots will probably need to wear coveralls or full [[Robots in Space Suits\|space suits]] to help keep their insides free of dust and to provide a stable temperature.
−

← Older revision		Revision as of 04:29, 13 August 2013
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	===Particle Mobility===		===Particle Mobility===

−	As long as regolith particles do not move they are not a problem. We want nothing more ~~that~~ to let sleeping dogs lie. The problem is that the dust can be moved by natural causes or by the actions of man, and then it can get into the wrong place and do a lot of damage.	+	As long as regolith particles do not move they are not a problem. We want nothing more than to let sleeping dogs lie. The problem is that the dust can be moved by natural causes or by the actions of man, and then it can get into the wrong place and do a lot of damage.

@@ Line 152: / Line 152: @@
 *[[Lunar Regolith]]
 *[[Lunar Soil]]
 ==External Links==
 *[http://hefd.jsc.nasa.gov/files/StubbsImpactOnExploration.4075.pdf “Impact of Dust on Lunar Exploration”] Timothy J. Stubbs, Richard R. Vondrak, and William M. Farrell
 *[http://www.lpi.usra.edu/meetings/lpsc2005/pdf/1899.pdf “A dynamic Fountain Model for lunar dust”] Timothy J. Stubbs, Richard R. Vondrak, William M. Farrell
@@ Line 161: / Line 161: @@
 *[http://est.msfc.nasa.gov/workshops/LRSM_docs/Day1/Gaier_LRSim_Wrkshp.pdf The Effects of Lunar Dust on Advanced EVA Systems: Lessons from Apollo] James Gaier, NASA Glenn Research Center, pdf of report to Lunar Regolith Simulant Materials Workshop
 *[http://www.mchinsure.com/apollo/item_a11dbu.html Microscopic Close Up of Lunar Dust]
 <br>

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 ==The Response:==
-A major effort to control dust will be needed.
+A major effort to control dust will be needed<ref>[http://www.space.com/adastra/adastra_moondust_060223.html Solving Settlement Problems: Dealing with Moon Dust] Ad Astra By Edward D. Flinn, posted: 23 February 2006 07:11 am ET</ref>.
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 All optical apertures may require fully actuated covers that can be opened and closed remotely.  However these can fail, especially in a dusty environment.
 ==Conclusion==

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 The bulk of regolith is coarser grains mixed with rock to a depth of several meters.  Below that is crushed rock in increasingly larger sizes.
-There are '''no''' Brazil nuts on the Moon.  If you shake a can of mixed nuts, the larger nuts will rise to the top because it is statistically easier for a small nut to work its way under a large nut than for a large nut to work its way under a lot of small nuts.  On the Moon the large rocks tend to be found in the lower levels of regolith.  There are also a few rocks of all sizes scattered across the surface and throughout all levels of the regolith.  See [[Regolith]].
+There are '''no''' Brazil nuts on the Moon.  If you shake a can of mixed nuts, the larger nuts will rise to the top because it is statistically easier for a small nut to work its way under a large nut than for a large nut to work its way under a lot of small nuts.  Unlike a can of nuts, on the Moon the large rocks tend to be found in the lower levels of regolith.  There are also a few rocks of all sizes scattered across the surface and throughout all levels of the regolith.  See [[Regolith]].
 ===Particle Mobility===

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 Sometimes the largest problems are caused by the smallest things.  The threats caused by lunar dust are probably the most difficult problem lunar settlers will face.
-'''Please note:'''<br>
+{| cellpadding="10" style="border-style:none;border-width:0px"
 This article uses the '''µm''' abbreviation for '''[[exd:micron|microns]]''', micrometers, or 10<sup>-6</sup> meters.  This is equivalent to one millionth of a meter (1 m/1,000,000), a thousand nanometers, or approximately one tenth of the diameter of a droplet of mist or fog.
+|}
 ==General Description==

← Older revision		Revision as of 20:41, 1 April 2007
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	'''Please note:'''<br>		'''Please note:'''<br>
−	This article uses the '''µm''' abbreviation for '''microns''', micrometers, or 10<sup>-6</sup> meters. This is equivalent to one millionth of a meter (1 m/1,000,000), a thousand nanometers, or approximately one tenth of the diameter of a droplet of mist or fog.	+	This article uses the '''µm''' abbreviation for '''[[exd:micron\|microns]]''', micrometers, or 10<sup>-6</sup> meters. This is equivalent to one millionth of a meter (1 m/1,000,000), a thousand nanometers, or approximately one tenth of the diameter of a droplet of mist or fog.

← Older revision		Revision as of 12:00, 1 April 2007
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	There will probably need to be outside robots and inside robots. It will simply be too much trouble to clean an outside robot to bring it inside.		There will probably need to be outside robots and inside robots. It will simply be too much trouble to clean an outside robot to bring it inside.

		+	To support industrail activity, one or two shop areas will be needed. These will represent particarlly difficult problems for controlling dust as complex equipment will need to be brought in and out, often on an emergancy basis.

	===Protecting people===		===Protecting people===

@@ Line 54: / Line 54: @@
 * During construction
-The mass of dust moved by human activity can be controlled and we must make every effort required to do so.
+The mass of dust moved by human activity can be controlled and we must make every effort that is required to do so.
 ===Electrostatic Movement===