Right. Would this be as a replacement for both PMA2 and PMA3?
Any idea as to LV - I guess it would be too wide to be launched atop Orion. Is this something that could be flight ready by the end of STS or go up in the HTV unpressurised section. (I think this was mentioned in an 8th floor update).
Learned the answer today. PMA-3 (later CDA) will go to N2z.
With PMA-3 at Node-2 zenith you lose the backup CBM for visiting vehicles (unless a Node-3 CBM could be used, which I don't know). But you have two PMAs at useable locations at a time when you don't need any PMA (from the end of STS to Orion, 7 years).
Wouldn't it be better to have two CBMs for visiting vehicles (Node 2 nadir and zenith) at a time when such flights will happen (HTV, COTS) and just one PMA (like today) when none is actually needed? Put PMA-3 at Node-3 until needed.
General questions about Node-3 CBMs:
1) Which ones will have the technical equipment to be used (port, starboard and nadir, some else)?
2) Which ones could be used from a clearance perspective for say, an SSRMS mounted MPLM (forward? (truss), zenith? (SGANT), aft? (Russian part))?
3) Could PMA-3 live at Node-3 port, or are there clearance issues with the radiator?
Analyst
Learned the answer today. PMA-3 (later CDA) will go to N2z.
With PMA-3 at Node-2 zenith you lose the backup CBM for visiting vehicles (unless a Node-3 CBM could be used, which I don't know). But you have two PMAs at useable locations at a time when you don't need any PMA (from the end of STS to Orion, 7 years).
Wouldn't it be better to have two CBMs for visiting vehicles (Node 2 nadir and zenith) at a time when such flights will happen (HTV, COTS) and just one PMA (like today) when none is actually needed? Put PMA-3 at Node-3 until needed.
Duh. I didn't say it would go there *now.*
An where will it go now? It must be at Node-3.
Analyst
Had no idea Z1 had an pressurized vestibule, always heard is completely unpressurized.
I remember this coming up before. It is known as the Z1 Dome, if I recall. At one point, someone posted pics of the dome area here.
Still trying to find interior images. No luck yet.
I've got two images of Sergei Krikalev accessing the pressurized volume of Z1 but I don't remember if they are L2 are not (Chris, please advise)
Z1 has a pressurized volume?
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Had no idea Z1 had an pressurized vestibule, always heard is completely unpressurized.
I remember this coming up before. It is known as the Z1 Dome, if I recall. At one point, someone posted pics of the dome area here.
Still trying to find interior images. No luck yet.
I've got two images of Sergei Krikalev accessing the pressurized volume of Z1 but I don't remember if they are L2 are not (Chris, please advise)
Those pics are available on the NASA website.
http://www.nasa.gov/images/content/118032main_hassman_iss_briefing4_med.jpg
http://www.nasaspaceflight.com/2010/01/sts-130-may-postponed-node-3-threatens-swap/OMG I thought NASA tested everything to a fair-the-well. What happened that they would discover this at the last minute?
(Edit;)
From Bill Harwood,
http://www.cbsnews.com/network/news/space/current.htmlNASA managers originally intended to attach Tranquility to Unity's Earth-facing port but later decided to mount it on the left side instead. Connectors needed to circulate ammonia coolant to and from Tranquility were not correctly positioned, or "clocked," for Tranquility to be attached to Unity's left-side port.
As a result, custom hoses and connectors were ordered to compensate for the offset. During a ground test this week, a hose ruptured below the expected threshold. The failure occurred at a pressure of nearly 1,000 pounds per square inch, much higher than normal station pressures of around 300 psi, but engineers are looking into the issue to find out what might be needed to resolve the matter.
I seem to remember that Node 3 and Cupola were to be moved to the Nadir port of Node 2 is that still happening or did I miss something?
I seem to remember that Node 3 and Cupola were to be moved to the Nadir port of Node 2 is that still happening or did I miss something?
That was never the plan. Node 3 was originally planned to be berthed to Node 1 nadir. I don't believe there are any plans to relocate it.
Why didn't they put Node 3 at Node 2 forward?
Why didn't they put Node 3 at Node 2 forward?
Umbilical reach, for one. SSRMS reach (can't pull shuttle payloads out of the bay because it's further away) for another.
That is Node 1 nadir.
Sorry, that is what I meant. Is the plan to move Node3 and Cupola to a Nadir position or are they being left where they are, and if so why?
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