astrobrian - 25/4/2006 7:06 PMIts the aft External Tank connections to the Shuttle if what I am seeing is correct
Pointman 7 - 25/4/2006 7:12 PMQuoteastrobrian - 25/4/2006 7:06 PMIts the aft External Tank connections to the Shuttle if what I am seeing is correctLOL. Yeah, I think I worked that out I want to know what each electrical connections aft port connectors I'm seeing here.
dmc6960 - 26/4/2006 11:56 AMWhy are both the LH2 and LO2 feedlines 17 inches if the engines require 6 times the amount of hydrogen than they do oxygen?
GLS - 28/4/2006 9:44 AMI have a couple more questions (actually I have more, but I'll ask them later...):1) I was giving a quick read at the CAIB report the other day, and on STS 107 there was a 2.08sec, window protect maneuver at T+127.7 using RCS F1U, F2U, F3U. WHAT IS THIS???
Jim - 28/4/2006 12:20 PMQuoteZoomer30 - 28/4/2006 12:14 PMCant find the post for some reason, but one thing that was not mentioned was that the shuttle, no matter what orbital declination it will be in, MUST go to orbit "heads down, wing level" until SRB sep. Or in other words, upside down. The reason is its the only safe way to get rid of the SRBs. If they shuttle flew on top of the stack, the SRBs would slam into the wings. A few mins after SRB sep the shuttle does that roll that does place the ship on top, thats so they can tap into the TDRS sat for ground comm (they started that in '98 I think, so they could close ground stations that are used during ascent).I think the previous poster thought the shuttle was the only ship to do a roll after launch. All rockets have done this, its just more visable with the shuttle.It has nothing to do the SRB's. It is to reduce the loads on the wings. The roll back to orbiter on top is to increase performance, a better TDRSS link was just a fallout.The Shuttle Q &A thread is were questions like this go
Zoomer30 - 28/4/2006 12:14 PMCant find the post for some reason, but one thing that was not mentioned was that the shuttle, no matter what orbital declination it will be in, MUST go to orbit "heads down, wing level" until SRB sep. Or in other words, upside down. The reason is its the only safe way to get rid of the SRBs. If they shuttle flew on top of the stack, the SRBs would slam into the wings. A few mins after SRB sep the shuttle does that roll that does place the ship on top, thats so they can tap into the TDRS sat for ground comm (they started that in '98 I think, so they could close ground stations that are used during ascent).I think the previous poster thought the shuttle was the only ship to do a roll after launch. All rockets have done this, its just more visable with the shuttle.
mkirk - 28/4/2006 3:07 PMOTHER benefits of the Roll to Heads down is: visible horizon for the crew (helps with abort and manual flying procedures), G-loading on crew is more favorable, communication with the ground stations is not blocked by the ET.
hyper_snyper - 28/4/2006 7:53 PMI have a quick shuttle question.During STS-121 or any other subsequent mission, there are going to be cameras on the ground and on the tank to spot falling foam. If a big chunk of foam flies free and hits the orbiter and damages the TPS (heaven forbid) during the early stages of ascent and it's spotted by the cameras nice and clear do the mission controllers have the option of telling the crew to abort TAL or RTLS? If it's obvious damage has been done, I don't see how it would be a good idea to let them continue to orbit.
psloss - 28/4/2006 6:18 PMQuotemkirk - 28/4/2006 3:07 PMOTHER benefits of the Roll to Heads down is: visible horizon for the crew (helps with abort and manual flying procedures), G-loading on crew is more favorable, communication with the ground stations is not blocked by the ET.(Hope it's OK to bring this over from the locked thread...)Hi Mark,Weren't some studies done/consideration given to a heads-up ascent? I want to say this was associated with other ascent changes using the 5-segment SRBs (like ATO off the pad), but maybe it's unconnected...have to go do some digging for references...This reference is only available offline, though the first page (w/abstract) can be downloaded:http://www.aiaa.org/content.cfm?pageid=406&gTable=japaperimportPre97&gID=25979And an interesting old Usenet thread (not sure about the accuracy); here's one post:http://groups.google.com/group/sci.space.shuttle/msg/590bae76a518a1ac(I'd be interested in anything you know about this.)Thanks,Philip Sloss
hyper_snyper - 28/4/2006 6:53 PMI have a quick shuttle question.During STS-121 or any other subsequent mission, there are going to be cameras on the ground and on the tank to spot falling foam. If a big chunk of foam flies free and hits the orbiter and damages the TPS (heaven forbid) during the early stages of ascent and it's spotted by the cameras nice and clear do the mission controllers have the option of telling the crew to abort TAL or RTLS? If it's obvious damage has been done, I don't see how it would be a good idea to let them continue to orbit.
GLS - 29/4/2006 3:24 PMAnd can anyone anwser the second question?2) On cameras ET207 and ET208, there's some *lines* in the image at about 60-90sec into the flight. Is that a reflection or what?
GLS - 29/4/2006 2:24 PMAnd can anyone anwser the second question?2) On cameras ET207 and ET208, there's some *lines* in the image at about 60-90sec into the flight. Is that a reflection or what?