Talk:Integrated Truss Structure

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Contents 1 Talk:ISS Solar Arrays 2 Merge 3 Talk:ISS Truss 4 Plasma contractor 5 Merging 6 Nomenclature 7 Additional Assembly 8 Current Image 9 P5 mass 10 wrong units for battery capacity? 11 P6 location 12 SARJs and BGAs 13 The truss rail 14 Materials used for truss elements 15 A good source

[edit] Talk:ISS Solar Arrays

[edit] Talk:ISS Truss

[edit] Merging

I imported here the discussions from the now merged articles and put redirects to this talk page. Some major work needs also to be done on this new article, which is extremely out of date (starting from the ISS rendering, which features elements cancelled years ago like the russian Science Power Platform!) // Duccio (write me) 11:14, 18 September 2006 (UTC)

[edit] Nomenclature

I'd like to edit the truss references to be clearer. I'd like to limit the use of the "slash" to the P3/P4 and S3/S4 trusses, and use commas for the rest. The "slashed" truss elements are joined on the ground and delivered as a package, whereas the rest of the truss elements are being delivered individually. Please comment. Srain 21:35, 18 September 2006 (UTC)

yup, agreed.. NASA separates them like that as well [1]. for a hugely detailed description of the P3 and P4 truss segments, and apparently how they differ is at the bottom of this article. Mlm42 18:39, 20 September 2006 (UTC)

Done.Srain 20:18, 22 September 2006 (UTC)

[edit] Additional Assembly

I added a reference to the final location of truss P6 in the text, but I'd also like to add that to the truss assembly table (with dashes in the size/weight columns). Please comment. Srain 21:35, 18 September 2006 (UTC)

it would be nice to clarify that in the table as well, if there's a good way of fitting it in.. keeping in mind this is a sub-table from ISS assembly sequence, it may be good to think of that table as well. Mlm42 18:44, 20 September 2006 (UTC)

I changed this table - I'm looking at the other page to see if there's a graceful way to add it there, too. Srain 20:18, 22 September 2006 (UTC)

[edit] Current Image

I added an image from STS-115 between the December 2000 image and the computer rendering. I suggest that this should be updated with a current image whenever a major addition is made to the station. I also realize that the orientation of the photo might be confusing, but the image is so compelling I couldn't bring myself to rotate it.Srain 20:18, 22 September 2006 (UTC)

[edit] P5 mass

I am extremely surprised that the P5 truss element launched on STS-116 has a mass of 12 tons. The STS-116 article itself says 3 tons, which looks quite correct. Could someone check this figure ?Hektor 16:34, 16 December 2006 (UTC)

You are correct. STS-116 Press Kit (http://www.nasa.gov/pdf/162182main_STS-116_Press_Kit.pdf) on p. 72 shows 4110 lbs / 1864.26 kg. Srain 05:54, 24 December 2006 (UTC)

[edit] wrong units for battery capacity?

The article currently says the batteries are "capable of storing a total of 8 kW of electrical power". Isn't the right units kW hours or Joules??? Erich 23:36, 13 September 2007 (UTC)

Watt is a unit of power where a watt-hour is a unit of energy. Batteries store energy, so I agree the units should be changed. I found the probable reference for this section at http://www.nasaspaceflight.com/content/?cid=4799 (near the bottom at "Each Battery Subassembly ORU ...") and it quotes the power units, so someone needs to find a better reference. But this article [2] directly from NASA includes electric charge and energy numbers: "81-A·hr, 4-kW·hr nameplate capacity". I'll update the article. Srain 19:57, 14 September 2007 (UTC)

[edit] P6 location

P6 has the torn solar array; why does the current diagram show P6 in red, when it looks like blue is being used for the STS-120 components? Because P6 was already in orbit, but it was moved to where it is shown on the diagram? (SEWilco 03:09, 31 October 2007 (UTC))

Correct. If you open the image, you will see that orange color means "already in orbit" where the other colors mean "pending launch by..." --TheDJ (talk • contribs) 08:13, 31 October 2007 (UTC)

[edit] SARJs and BGAs

Would be nice if we could get an image like http://www.cbsnews.com/network/news/space/116/iss_arrays.gif added to the article. I'm just not sure what kind of copyright/licensing is on that image. http://www.cbsnews.com/network/news/space/116/STS-116_Archive.html --TheDJ (talk • contribs) 20:30, 9 November 2007 (UTC)

It would be nice, especially with the SARJ bearing problem. How about taking a public domain image of the station that we have, and adding labels to it a la the CBS image? I do not quite know how to do this, but I think it should not be too difficult for someone who knows the tools needed.

At the moment there seems to be almost nothing about the bearing troubles either here or in the main ISS article, which appears to me to be a serious omission. I know little about it in detail myself, and came here looking for more info, so if anyone can find the references and write it up, that would be wonderful. Thanks, Wwheaton (talk) 06:16, 26 March 2008 (UTC)

[edit] The truss rail

We desperately need to add something about the rail on the truss. It's a unique feature that was totally new in space station design. It was already part of the Space Station Freedom design, and the CETA carts on it were already tested during STS-37 http://nix.larc.nasa.gov/info;jsessionid=27art3enil3kh?id=S89-50846&orgid=8 --TheDJ (talk • contribs) 02:46, 17 November 2007 (UTC)

[edit] Materials used for truss elements

I could not find in this article any information about the material used for the truss structure itself. Is it made of metal? Plastic? Ceramic? Wood? What are its mechanical properties? How dense is it? How flexible? What stress loads can it carry? Lacking this information, I have reassessed the article from class B to class Start. (sdsds - talk) 21:40, 17 November 2007 (UTC)

[edit] A good source

Found this source http://www.boeing.com/defense-space/space/spacestation/components/docs/P3-P4.pdf on the P3 P4 truss section by Boeing. It provides a lot of useful technical data about this system. No time to properly use it right now myself. --TheDJ (talk • contribs) 23:22, 2 December 2007 (UTC)