Quote from: Jim on 03/16/2010 11:23 pmThat 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?
That is Node 1 nadir.
Umbilical reach, for one. SSRMS reach (can't pull shuttle payloads out of the bay because it's further away) for another.
Quote from: Jorge on 03/16/2010 11:17 pmUmbilical reach, for one. SSRMS reach (can't pull shuttle payloads out of the bay because it's further away) for another.Don't Node3 have a PDGF?
Quote from: Pheogh on 03/16/2010 11:30 pmQuote from: Jim on 03/16/2010 11:23 pmThat 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?Most likely they will remain.Why do you want to move it?
Quote from: Jorge on 03/16/2010 11:47 pmQuote from: Pheogh on 03/16/2010 11:30 pmQuote from: Jim on 03/16/2010 11:23 pmThat 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?Most likely they will remain.Why do you want to move it?Wouldn't it have a better vantage point for grappling approaching vehicles destined for Node 2 Nadir.
Also it would be along the central long axis of the station.
Quote from: arkaska on 03/17/2010 09:39 amQuote from: Jorge on 03/16/2010 11:17 pmUmbilical reach, for one. SSRMS reach (can't pull shuttle payloads out of the bay because it's further away) for another.Don't Node3 have a PDGF?Node 3 doesn't have a PDGF on it's actual shell, but it's Zenith CBM is blocked off and a PDGF is located there.
Quote from: Space Pete on 03/17/2010 11:09 amQuote from: arkaska on 03/17/2010 09:39 amQuote from: Jorge on 03/16/2010 11:17 pmUmbilical reach, for one. SSRMS reach (can't pull shuttle payloads out of the bay because it's further away) for another.Don't Node3 have a PDGF?Node 3 doesn't have a PDGF on it's actual shell, but it's Zenith CBM is blocked off and a PDGF is located there.OK, to clarify, it's not the first part of the operation that is affected, it's the last part.With the shuttle docked to PMA-2 on Node 2, the SRMS can't pull payloads out of the bay due to Kibo blocking the elbow. So for station payloads destined for the truss (such as the ELCs), a double-handoff is required: SSRMS on Lab PGDF extracts payload from bay, hands off to SRMS, then the SSRMS translates over to the MBS, the MBS translates to the appropriate worksite, then the SRMS hands the payload off to the SSRMS for installation.If Node 3 were installed to Node 2 forward, the double handoff would not be required since the SRMS now has adequate clearance from Kibo. The SRMS could extract the payload from the bay and the SSRMS could go directly to the MBS. But the two arms would then be too far apart for the handoff, especially if the payload were destined for the starboard truss.
Quote from: Jorge on 03/17/2010 11:10 pmQuote from: Space Pete on 03/17/2010 11:09 amQuote from: arkaska on 03/17/2010 09:39 amQuote from: Jorge on 03/16/2010 11:17 pmUmbilical reach, for one. SSRMS reach (can't pull shuttle payloads out of the bay because it's further away) for another.Don't Node3 have a PDGF?Node 3 doesn't have a PDGF on it's actual shell, but it's Zenith CBM is blocked off and a PDGF is located there.OK, to clarify, it's not the first part of the operation that is affected, it's the last part.With the shuttle docked to PMA-2 on Node 2, the SRMS can't pull payloads out of the bay due to Kibo blocking the elbow. So for station payloads destined for the truss (such as the ELCs), a double-handoff is required: SSRMS on Lab PGDF extracts payload from bay, hands off to SRMS, then the SSRMS translates over to the MBS, the MBS translates to the appropriate worksite, then the SRMS hands the payload off to the SSRMS for installation.If Node 3 were installed to Node 2 forward, the double handoff would not be required since the SRMS now has adequate clearance from Kibo. The SRMS could extract the payload from the bay and the SSRMS could go directly to the MBS. But the two arms would then be too far apart for the handoff, especially if the payload were destined for the starboard truss. True - but why? We can do the double handoff just fine, there are only a few more shuttle flights left and it would be very hard to have put Node 3 there. Not worth it.