https://lunarpedia.org/index.php?title=Polar_Tower&feed=atom&action=historyPolar Tower - Revision history2024-03-29T12:54:24ZRevision history for this page on the wikiMediaWiki 1.34.2https://lunarpedia.org/index.php?title=Polar_Tower&diff=17803&oldid=prevFarred: /* Assembly */ adding link2012-05-16T08:39:16Z<p><span dir="auto"><span class="autocomment">Assembly: </span> adding link</span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The simplest method for assembly is similar to the terrestrial building cranes obvious on the skyline of most cities. These are module based systems with a crane at the top for lifting things into place. On earth these can reach to 30 stories easily so very little needs to be changed in their design to adapt them to the moon or elsewhere. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The simplest method for assembly is similar to the terrestrial building cranes obvious on the skyline of most cities. These are module based systems with a crane at the top for lifting things into place. On earth these can reach to 30 stories easily so very little needs to be changed in their design to adapt them to the moon or elsewhere. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The process would involve the robotic or manual assembly of structural units by welding together nickel-iron structural members. Without carbon, these will be softer and more malleable than the higher quality steels on earth. Each unit is then lifted into place by a specialized crane attached to the rising tower. This crane would attach the unit by welding it to the tower then advanding the same height as the structural unit to be ready for the next on. Given sufficient supplies of nickel-iron and you could conceivably build a tower in only a few months. This is an important detail because you have have 6 months of continuous sunlight at the pole if you arrive at the spring solar equinox. If you get your tower up to a suitable height by fall then you will not have the problem of lack of sunlight during the winter. </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The process would involve the <ins class="diffchange diffchange-inline">[[Progress in Remotely Operated Equipment|</ins>robotic<ins class="diffchange diffchange-inline">]] </ins>or manual assembly of structural units by welding together nickel-iron structural members. Without carbon, these will be softer and more malleable than the higher quality steels on earth. Each unit is then lifted into place by a specialized crane attached to the rising tower. This crane would attach the unit by welding it to the tower then advanding the same height as the structural unit to be ready for the next on. Given sufficient supplies of nickel-iron and you could conceivably build a tower in only a few months. This is an important detail because you have have 6 months of continuous sunlight at the pole if you arrive at the spring solar equinox. If you get your tower up to a suitable height by fall then you will not have the problem of lack of sunlight during the winter.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Asteroid advantages== </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Asteroid advantages== </div></td></tr>
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</table>Farredhttps://lunarpedia.org/index.php?title=Polar_Tower&diff=17802&oldid=prevFarred: /* Design considerations */ fix typo2012-05-16T04:10:24Z<p><span dir="auto"><span class="autocomment">Design considerations: </span> fix typo</span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>There are three types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels are fixed too. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>There are three types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels are fixed too. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The second is <del class="diffchange diffchange-inline">here </del>the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[Solar Furnace]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on maintenance costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The second is <ins class="diffchange diffchange-inline">where </ins>the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[Solar Furnace]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on maintenance costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A third type of design is a tower with the solar array that does not rotate but the top of the tower points to the sun like a sunflower does. The advantage of this type of tower is that the movable joints needed to make the tower bend this way are just hydraulic pistons substituting for some of the vertical/diagonal structural members. This type of joint can be lubricated to maintain a linear seal by encasing the entire length of the hydraulic piston in accordion fold type sleeve that holds a pound per square inch or so of gas pressure around the hydraulic piston so the lubricant does not evaporate. The same can not be done for the rotary bearings of wheels which are at the base of the second type of tower design. A thin foil accordion-fold micrometeor shield can in turn protect the pressure retention sleeve. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A third type of design is a tower with the solar array that does not rotate but the top of the tower points to the sun like a sunflower does. The advantage of this type of tower is that the movable joints needed to make the tower bend this way are just hydraulic pistons substituting for some of the vertical/diagonal structural members. This type of joint can be lubricated to maintain a linear seal by encasing the entire length of the hydraulic piston in accordion fold type sleeve that holds a pound per square inch or so of gas pressure around the hydraulic piston so the lubricant does not evaporate. The same can not be done for the rotary bearings of wheels which are at the base of the second type of tower design. A thin foil accordion-fold micrometeor shield can in turn protect the pressure retention sleeve. </div></td></tr>
</table>Farredhttps://lunarpedia.org/index.php?title=Polar_Tower&diff=17801&oldid=prevFarred: /* Design considerations */ rewording2012-05-16T04:09:15Z<p><span dir="auto"><span class="autocomment">Design considerations: </span> rewording</span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 04:09, 16 May 2012</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l13" >Line 13:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Design considerations== </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Design considerations== </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>There are three types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels <del class="diffchange diffchange-inline">do</del>. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>There are three types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels <ins class="diffchange diffchange-inline">are fixed too</ins>. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The second is here the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[Solar Furnace]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on maintenance costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The second is here the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[Solar Furnace]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on maintenance costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td></tr>
</table>Farredhttps://lunarpedia.org/index.php?title=Polar_Tower&diff=17800&oldid=prevFarred: correction as per discussion2012-05-16T03:56:25Z<p>correction as per discussion</p>
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</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l5" >Line 5:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The formula of calculating how high your tower has to be is as follows </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The formula of calculating how high your tower has to be is as follows </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Average radius * (1 <del class="diffchange diffchange-inline">- </del>Cos(Inclination angle)) </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">Height = </ins>Average radius * (1<ins class="diffchange diffchange-inline">/</ins>Cos(Inclination angle) <ins class="diffchange diffchange-inline">- 1</ins>) </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>For the moon this works out to be <del class="diffchange diffchange-inline">something like 595 </del>meters. On earth you would be looking at a major structure because you don't want it to come crashing down in a storm. The moon doesn't have storms so your need for overbuilding for wind factor is eliminated. Because the gravity is roughly 1/6 that of earth, your height can be roughly 6 times higher without changing the size of the structural members. </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>For the moon <ins class="diffchange diffchange-inline">with a radius = 1728 km and inclination = 1.54 degrees </ins>this works out to be <ins class="diffchange diffchange-inline">about 624 </ins>meters. On earth you would be looking at a major structure because you don't want it to come crashing down in a storm. The moon doesn't have storms so your need for overbuilding for wind factor is eliminated. Because the gravity is roughly 1/6 that of earth, your height can be roughly 6 times higher without changing the size of the structural members. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>So what you would be designing for on earth is a structure 100 meters in height and then stretch it out to six times as long. This is equivalent to a 30 story tower which is smaller than many modern windmills. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>So what you would be designing for on earth is a structure 100 meters in height and then stretch it out to six times as long. This is equivalent to a 30 story tower which is smaller than many modern windmills. </div></td></tr>
</table>Farredhttps://lunarpedia.org/index.php?title=Polar_Tower&diff=17781&oldid=prevFarred: /* Design considerations */ addition2012-05-15T02:51:31Z<p><span dir="auto"><span class="autocomment">Design considerations: </span> addition</span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Design considerations== </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Design considerations== </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> </ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>There are <del class="diffchange diffchange-inline">two </del>types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels do. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>There are <ins class="diffchange diffchange-inline">three </ins>types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels do. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> </ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The second is here the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[Solar Furnace]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on maintenance costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The second is here the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[Solar Furnace]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on maintenance costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> </ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The <del class="diffchange diffchange-inline">third </del>detail is the siting of the tower. The natural cratered terrain of the moon is thought to include a few peaks that are permanently in the sunlight. Siting a tower near one of these will significantly decrease the height needed to be in 100% year round sunlight. Additional towers will have a relatively minor effect of shading each other and can be built all over the poles of the moon until about 2 degrees from the pole where the height requirement gets up into the 3-4 km range.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">A third type of design is a tower with the solar array that does not rotate but the top of the tower points to the sun like a sunflower does. </ins>The <ins class="diffchange diffchange-inline">advantage of this type of tower is that the movable joints needed to make the tower bend this way are just hydraulic pistons substituting for some of the vertical/diagonal structural members. This type of joint can be lubricated to maintain a linear seal by encasing the entire length of the hydraulic piston in accordion fold type sleeve that holds a pound per square inch or so of gas pressure around the hydraulic piston so the lubricant does not evaporate. The same can not be done for the rotary bearings of wheels which are at the base of the second type of tower design. A thin foil accordion-fold micrometeor shield can in turn protect the pressure retention sleeve. </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">Another </ins>detail is the siting of the tower. The natural cratered terrain of the moon is thought to include a few peaks that are permanently in the sunlight. Siting a tower near one of these will significantly decrease the height needed to be in 100% year round sunlight. Additional towers will have a relatively minor effect of shading each other and can be built all over the poles of the moon until about 2 degrees from the pole where the height requirement gets up into the 3-4 km range.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Assembly== </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Assembly== </div></td></tr>
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</table>Farredhttps://lunarpedia.org/index.php?title=Polar_Tower&diff=11269&oldid=prevCfrjlr: Reverted edits by 151.9.162.185 (Talk); changed back to last version by Cfrjlr2007-11-03T12:32:13Z<p>Reverted edits by <a href="/w/Special:Contributions/151.9.162.185" title="Special:Contributions/151.9.162.185">151.9.162.185</a> (<a href="/index.php?title=User_talk:151.9.162.185&action=edit&redlink=1" class="new" title="User talk:151.9.162.185 (page does not exist)">Talk</a>); changed back to last version by <a href="/w/User:Cfrjlr" title="User:Cfrjlr">Cfrjlr</a></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 12:32, 3 November 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
<td colspan="2" class="diff-lineno">Line 1:</td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">zelerc</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The advantage of being at the pole of any object in space where there is a low degree of inclination to the orbital plane around the sun is you can build a tower to reach up to the continuous light. This feature boosts the efficiency of your solar panels to 100% all year round which is vital to staying anywhere near the poles in the dark of winter. It also vastly simplifies your power storage for nighttime as well as the design of anything you want to stay pointed at the sun. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The advantage of being at the pole of any object in space where there is a low degree of inclination to the orbital plane around the sun is you can build a tower to reach up to the continuous light. This feature boosts the efficiency of your solar panels to 100% all year round which is vital to staying anywhere near the poles in the dark of winter. It also vastly simplifies your power storage for nighttime as well as the design of anything you want to stay pointed at the sun. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
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</table>Cfrjlrhttps://lunarpedia.org/index.php?title=Polar_Tower&diff=11236&oldid=prev151.9.162.185 at 08:24, 30 October 20072007-10-30T08:24:24Z<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 08:24, 30 October 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
<td colspan="2" class="diff-lineno">Line 1:</td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">zelerc</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The advantage of being at the pole of any object in space where there is a low degree of inclination to the orbital plane around the sun is you can build a tower to reach up to the continuous light. This feature boosts the efficiency of your solar panels to 100% all year round which is vital to staying anywhere near the poles in the dark of winter. It also vastly simplifies your power storage for nighttime as well as the design of anything you want to stay pointed at the sun. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The advantage of being at the pole of any object in space where there is a low degree of inclination to the orbital plane around the sun is you can build a tower to reach up to the continuous light. This feature boosts the efficiency of your solar panels to 100% all year round which is vital to staying anywhere near the poles in the dark of winter. It also vastly simplifies your power storage for nighttime as well as the design of anything you want to stay pointed at the sun. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
</table>151.9.162.185https://lunarpedia.org/index.php?title=Polar_Tower&diff=6898&oldid=prevCfrjlr: /* Design considerations */ link2007-03-24T20:05:45Z<p><span dir="auto"><span class="autocomment">Design considerations: </span> link</span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
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<col class="diff-marker" />
<col class="diff-content" />
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 20:05, 24 March 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l15" >Line 15:</td>
<td colspan="2" class="diff-lineno">Line 15:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>There are two types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels do. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>There are two types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels do. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The second is here the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[<del class="diffchange diffchange-inline">solar furnace</del>]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on maintenance costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The second is here the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[<ins class="diffchange diffchange-inline">Solar Furnace</ins>]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on maintenance costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The third detail is the siting of the tower. The natural cratered terrain of the moon is thought to include a few peaks that are permanently in the sunlight. Siting a tower near one of these will significantly decrease the height needed to be in 100% year round sunlight. Additional towers will have a relatively minor effect of shading each other and can be built all over the poles of the moon until about 2 degrees from the pole where the height requirement gets up into the 3-4 km range. </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The third detail is the siting of the tower. The natural cratered terrain of the moon is thought to include a few peaks that are permanently in the sunlight. Siting a tower near one of these will significantly decrease the height needed to be in 100% year round sunlight. Additional towers will have a relatively minor effect of shading each other and can be built all over the poles of the moon until about 2 degrees from the pole where the height requirement gets up into the 3-4 km range.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Assembly== </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Assembly== </div></td></tr>
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</table>Cfrjlrhttps://lunarpedia.org/index.php?title=Polar_Tower&diff=6897&oldid=prevCfrjlr: cat2007-03-24T20:00:23Z<p>cat</p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 20:00, 24 March 2007</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Settlement]]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Settlement]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Locations]]</ins></div></td></tr>
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</table>Cfrjlrhttps://lunarpedia.org/index.php?title=Polar_Tower&diff=6896&oldid=prevCfrjlr: typos2007-03-24T19:54:07Z<p>typos</p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 19:54, 24 March 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
<td colspan="2" class="diff-lineno">Line 1:</td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The advantage of being at the pole of any object in space where there is a low degree of inclination to the orbital plane around the sun is you can build a tower to reach up to the continuous light. <del class="diffchange diffchange-inline"> </del>This feature boosts the <del class="diffchange diffchange-inline">effienciecy </del>of your solar panels to 100% all year round which is vital to staying anywhere near the poles in the dark of winter. <del class="diffchange diffchange-inline"> </del>It also vastly simplifies your power storage for nighttime as well as the design of anything you want to stay pointed at the sun.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The advantage of being at the pole of any object in space where there is a low degree of inclination to the orbital plane around the sun is you can build a tower to reach up to the continuous light. This feature boosts the <ins class="diffchange diffchange-inline">efficiency </ins>of your solar panels to 100% all year round which is vital to staying anywhere near the poles in the dark of winter. It also vastly simplifies your power storage for nighttime as well as the design of anything you want to stay pointed at the sun. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The moon is inclined with respect to the sun only 1 degrees 32 minutes. <del class="diffchange diffchange-inline"> </del>This is a very slight inclination and with an average radius of 1738 km you do not have to reach up high to be out of the shade.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The moon is inclined with respect to the sun only 1 degrees 32 minutes. This is a very slight inclination and with an average radius of 1738 km you do not have to reach up high to be out of the shade. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The formula of calculating how high your tower has to be is as follows</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The formula of calculating how high your tower has to be is as follows </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Average radius * (1 - Cos(Inclination angle))</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Average radius * (1 - Cos(Inclination angle)) </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>For the moon this works out to be something like 595 meters. <del class="diffchange diffchange-inline"> </del>On earth you would be looking at a major structure because you don't want it to come crashing down in a storm. <del class="diffchange diffchange-inline"> </del>The moon doesn't have storms so your need for overbuilding for wind factor is eliminated. <del class="diffchange diffchange-inline"> </del>Because the gravity is roughly 1/6 that of earth, your height can be roughly 6 times higher without changing the size of the structural members.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>For the moon this works out to be something like 595 meters. On earth you would be looking at a major structure because you don't want it to come crashing down in a storm. The moon doesn't have storms so your need for overbuilding for wind factor is eliminated. Because the gravity is roughly 1/6 that of earth, your height can be roughly 6 times higher without changing the size of the structural members. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>So what you would be designing for on earth is a structure 100 meters in height and then stretch it out to six times as long. <del class="diffchange diffchange-inline"> </del>This is equivalent to a 30 story tower which is smaller than many modern windmills.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>So what you would be designing for on earth is a structure 100 meters in height and then stretch it out to six times as long. This is equivalent to a 30 story tower which is smaller than many modern windmills. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==Design considerations==</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>==Design considerations== </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>There are two types of designs. <del class="diffchange diffchange-inline"> </del>The first is a traditional tower design that is fixed and all of the attachments to it like solar panels do. <del class="diffchange diffchange-inline"> </del>The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. <del class="diffchange diffchange-inline"> </del>The rest will have a moment of being in the shade of the tower if that matters. <del class="diffchange diffchange-inline"> </del>This design is well suited for multi function towers.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>There are two types of designs. The first is a traditional tower design that is fixed and all of the attachments to it like solar panels do. The problem for a polar tower is the only really good spot is the top one where you can pivot 360 degrees without hitting anything. The rest will have a moment of being in the shade of the tower if that matters. This design is well suited for multi function towers. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The second is here the whole tower rotates with the sun. <del class="diffchange diffchange-inline"> </del>The base is founded on a series of concentric train tracks that distribute the weight. <del class="diffchange diffchange-inline"> </del>If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. <del class="diffchange diffchange-inline"> </del>This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. <del class="diffchange diffchange-inline"> </del>Really big [[solar furnace]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. <del class="diffchange diffchange-inline"> </del>Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on <del class="diffchange diffchange-inline">maintenence </del>costs. <del class="diffchange diffchange-inline"> </del>This design is well suited for power generation only towers where little activity is done after they are built.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The second is here the whole tower rotates with the sun. The base is founded on a series of concentric train tracks that distribute the weight. If you add to your tower, you just add more wheels or add a new concentric ring for a wider base. This system greatly simplifies the tracking of the sun and makes it easier to focus everything in the same direction. Really big [[solar furnace]] arrays can be built that are fixed in the structure and you only have to move the focal point a bit. Additionally only one pivot connection needs to be made for electrical or plumbing connections which cuts down on <ins class="diffchange diffchange-inline">maintenance </ins>costs. This design is well suited for power generation only towers where little activity is done after they are built. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The third detail is the siting of the tower. <del class="diffchange diffchange-inline"> </del>The natural cratered <del class="diffchange diffchange-inline">terraine </del>of the moon is thought to include a few peaks that are <del class="diffchange diffchange-inline">perminently </del>in the sunlight. <del class="diffchange diffchange-inline"> </del>Siting a tower near one of these will significantly decrease the height needed to be in 100% year round sunlight. <del class="diffchange diffchange-inline"> </del>Additional towers will have a relatively minor effect of shading each other and can be built all over the poles of the moon until about 2 degrees from the pole where the height requirement gets up into the 3-4 km range.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The third detail is the siting of the tower. The natural cratered <ins class="diffchange diffchange-inline">terrain </ins>of the moon is thought to include a few peaks that are <ins class="diffchange diffchange-inline">permanently </ins>in the sunlight. Siting a tower near one of these will significantly decrease the height needed to be in 100% year round sunlight. Additional towers will have a relatively minor effect of shading each other and can be built all over the poles of the moon until about 2 degrees from the pole where the height requirement gets up into the 3-4 km range. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==Assembly==</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>==Assembly== </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The simplest method for assembly is similar to the terrestrial building cranes obvious on the skyline of most cities. <del class="diffchange diffchange-inline"> </del>These are module based systems with a crane at the top for lifting things into place. <del class="diffchange diffchange-inline"> </del>On earth these can reach to 30 stories easily so very little needs to be changed in their design to adapt them to the moon or elsewhere.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The simplest method for assembly is similar to the terrestrial building cranes obvious on the skyline of most cities. These are module based systems with a crane at the top for lifting things into place. On earth these can reach to 30 stories easily so very little needs to be changed in their design to adapt them to the moon or elsewhere. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The process would involve the robotic or manual assembly of <del class="diffchange diffchange-inline">structual </del>units by welding together nickel-iron structural members. <del class="diffchange diffchange-inline"> </del>Without carbon, these will be softer and more <del class="diffchange diffchange-inline">mallibile </del>than the higher quality steels on earth. <del class="diffchange diffchange-inline"> </del>Each unit is then lifted into place by a specialized crane attached to the rising tower. <del class="diffchange diffchange-inline"> </del>This crane would attach the unit by welding it to the tower then advanding the same height as the structural unit to be ready for the next on. <del class="diffchange diffchange-inline"> </del>Given <del class="diffchange diffchange-inline">sufficent </del>supplies of nickel-iron and you could <del class="diffchange diffchange-inline">conceavably </del>build a tower in only a few months. <del class="diffchange diffchange-inline"> </del>This is an important detail because you have have 6 months of continuous sunlight at the pole if you arrive at the spring solar equinox. <del class="diffchange diffchange-inline"> </del>If you get your tower up to a suitable height by fall then you will not have the problem of lack of sunlight during the winter.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The process would involve the robotic or manual assembly of <ins class="diffchange diffchange-inline">structural </ins>units by welding together nickel-iron structural members. Without carbon, these will be softer and more <ins class="diffchange diffchange-inline">malleable </ins>than the higher quality steels on earth. Each unit is then lifted into place by a specialized crane attached to the rising tower. This crane would attach the unit by welding it to the tower then advanding the same height as the structural unit to be ready for the next on. Given <ins class="diffchange diffchange-inline">sufficient </ins>supplies of nickel-iron and you could <ins class="diffchange diffchange-inline">conceivably </ins>build a tower in only a few months. This is an important detail because you have have 6 months of continuous sunlight at the pole if you arrive at the spring solar equinox. If you get your tower up to a suitable height by fall then you will not have the problem of lack of sunlight during the winter. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==Asteroid advantages==</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>==Asteroid advantages== </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Asteroids have a significant problem of being really cold. <del class="diffchange diffchange-inline"> </del>If they possess usable building materials like iron dust then building a tower may be the best way of solving this problem. <del class="diffchange diffchange-inline"> </del>The greatly reduced radius and micro gravity will likely make up for the lack of a better inclination. <del class="diffchange diffchange-inline"> </del>If you can build a really tall tower of several kilometers, you would be assured of a steady power source in what is otherwise a forbidding environment.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Asteroids have a significant problem of being really cold. If they possess usable building materials like iron dust then building a tower may be the best way of solving this problem. The greatly reduced radius and micro gravity will likely make up for the lack of a better inclination. If you can build a really tall tower of several kilometers, you would be assured of a steady power source in what is otherwise a forbidding environment. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Civil Engineering]]</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Civil Engineering]] </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category:<del class="diffchange diffchange-inline">Civil </del>Settlement]]</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Settlement]]</div></td></tr>
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