Talk:Integrated Truss Structure

message: :This discussion comes from the old Talk:ISS Truss page. For unsigned comments or other problems, see the Talk:ISS Truss history.
I'm planning to merge the ISS solar array page with this page for information on a convenient page. Bigtop 03:56, 10 September 2006 (UTC)
thread_title: Talk:ISS Truss

message: 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 Some major work needs also to be done on this new article, which is extremely out of date (starting from the ISS rendering, which features elements cancelled years ago like the russian Science Power Platform!)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)
thread_title:  Merging 

message: 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)
replies: text: yup, agreed.. NASA separates them like that as well . 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)
replies: text: Done.Srain 20:18, 22 September 2006 (UTC)
thread_title:  Nomenclature 

message: 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)
replies: text: 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)
replies: text: 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)
thread_title:  Additional Assembly 

message: 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)
thread_title:  Current Image 

message: 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)
replies: text: 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)
thread_title: P5 mass

message: 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)
replies: text: 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  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)
thread_title: wrong units for battery capacity?

message: 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)
replies: text: 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)
thread_title:  P6 location 

message: 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)
thread_title:  The truss rail 

message: 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)
replies: text: Aluminium alloy - possibly 2219-T6 aluminum alloy (which is widely used on the ISS). Quora answer - Rod57 (talk) 09:59, 27 November 2018 (UTC)
thread_title:  Materials used for truss elements 

message: 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)
thread_title: A good source

message: in the article it is claimed that Z1 is unpressurized, this is untrue as there is a small pressurized section that is used as storage.
This picture shows the dome when the node 1 zenith CBM hatch is open: http://www.nasa.gov/images/content/118032main_hassman_iss_briefing4_med.jpg
-Ronsmytheiii
:I just added a note to this effect in the Z1 section. Colds7ream (talk) 21:45, 21 September 2009 (UTC)
thread_title:  Z1 truss segment 

message: I noticed the article Drive Lock Assembly; it should probably be merged into this article. Mlm42 (talk) 17:15, 23 December 2010 (UTC)
replies: text: That sounds good to me.  The Drive Lock Assembly article is pretty short.  Geoffrey.landis (talk) 22:16, 21 September 2011 (UTC)
thread_title:  Merge from Drive Lock Assembly 

message: I'm a bit of noob regarding Wikipedia editing but I have a source for the "Citation needed" is the Solar Array Rotary Joint section. If someone who knows what they're doing wants to edit that. http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110015384.pdf  — Preceding unsigned comment added by Wolfpack40351 (talk • contribs) 04:39, 22 August 2016 (UTC)
thread_title:  Additional Source 

message: Intro says it is made from aluminium and stainless steel - but article does not say where any stainless steel is used. Could it be only in the trolley rails (and perhaps some fasteners) ? - Rod57 (talk) 09:19, 27 November 2018 (UTC)
replies: text: Stainless steel is literally only used for trunnions pins and Quick Disconnects on fluid lines.  The entire structure itself is machined 2219-T6, even the Mobile Transporter rails.  5 inch plates of aluminum were machined to make bulkheads for S0,S1,S3,P1,P3 and then those bulkheads were bolted (not welded) to longerons and diagonals also machined from aluminum.  The IEA boxes of S4, P4, S6 (portion) and P6 (portion) are also machined from aluminum plate.  I haven't found a reference but from photogrammetry it appears it was from 3" plate.  S4 and P4 are connected to their corresponding SARJ bulkheads with extruded tubular aluminum struts.  The S5 and P5 (Short Spacer) trusses and the portion of S6 and P6 called the Long Spacer truss are constructed of rectangular box aluminum tubes bolted to joints with round tubes used between some joints as diagonals. Hinnersd (talk) 20:39, 30 November 2022 (UTC)
thread_title:  Where is stainless steel used 

message: In this section, it describes the original Nickel Hydrogen batteries.
Would it be within the summary of this section to mention that the original set of Nickel Hydrogen batteries were later replaced by a second set.  Also, what happened to that first set of batteries? Were they returned in a shuttle or disposed of by reentry.
Since January 2017, there have been several spacewalks replacing the Nickel Hydrogen batteries with lithium-ion batteries on a two to one ratio.  Would this be notable enough for the article?
AmigaClone (talk) 10:45, 12 July 2020 (UTC)
thread_title:  Power conditioning and storage