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#400
by
Danny Dot
on 15 Jan, 2008 23:15
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Susan27 - 22/12/2007 8:52 AM
Hi,
I have 2 questions concerning the drag chute:
1) Is there kind of a fixed groundspeed (knots) when the chute will be activated for braking? Does it depend on the wind component or so? If so could you give me an approcimately speed nevertheless...?
2) At what exact speed the chute will be shot away, and does that speed varies of the wind component?
Thanks very much! 
Kind regards
The time of deploy is set so the chute disreefs just before nose wheel touchdown. This extra drag decreases the pitching moment of the orbiter coming down on the nose gear. As someone else stated, the gear is underdesigned and a lot of effort is needed to not exceed the landing gear limits.
Danny Deger
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#401
by
Danny Dot
on 15 Jan, 2008 23:27
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SiameseCat - 18/12/2007 8:30 PM
What is the pitch angle of the shuttle at SRB Sep?
IRRC is is about 20 degrees. If someone can point me to an ascent checklist, I can look it up. There is a cue card that has attitude vs. time.
Danny Deger
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#402
by
mkirk
on 16 Jan, 2008 14:00
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Danny Dot - 15/1/2008 6:10 PM
mkirk - 22/12/2007 9:53 AM
Susan27 - 21/12/2007 4:57 AM
Hi,
When watching (RWY 24?) final approaches at EDW AFB I recognized a strange black "object" (looking a bit like a triangle on the desert-ground) located directly between the PAPI lights (on the extended centerline) in front of the RWY. You can see the same object I think at White Sands...
Do you know what this object exatcly is? I assume it must have something to do with the PAPI approach system or even with the MLS-antennas(?)...but I am very unsure...
Do you know what that is...?
Thanks in advance!
Kind regards
These are the visual aim points. The triangle is located at the close in aim point (6500 feet from the runway) and the rectangle is at the nominal aim point (7500 feet from the runway). They are used primarily on the lackbed runways such as White Sands and Edwards. The concrete runways and KSC do not have them, and of the only TAL site to have them was Ben Guerir.
Mark Kirkman
Are you sure about this? My memory tells me all the runways with MLS also have aimpoints.
Danny Deger
I am referring specifically to the triangular visual aimpoints at the "close-in" and the rectangle at the "nominal" - the black painted markings used for visual contrast. As far as I know only the White Sands Runways and Edwards Runways have them. They are not at the current TAL sites or KSC, those sites rely on just the PAPIs.
Mark Kirkman
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#403
by
mkirk
on 16 Jan, 2008 14:20
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Danny Dot - 15/1/2008 6:27 PM
SiameseCat - 18/12/2007 8:30 PM
What is the pitch angle of the shuttle at SRB Sep?
IRRC is is about 20 degrees. If someone can point me to an ascent checklist, I can look it up. There is a cue card that has attitude vs. time.
Danny Deger
I thought I answered this a a few pages back, I really can't remember, but here is the Checklist Danny is referring to:
http://www.nasa.gov/centers/johnson/pdf/202926main_sts122_ascent_checklist.pdfpage 2-28 of the checklist (pdf page 58) shows the Ascent ADI Cue Card with pitch in the second column (i.e. THETA). Refer to VI of 6 (inirtial veocity of 6,000 feet per second) for the approximate pitch attitude during the SRB SEP timeframe.
Mark Kirkman
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#404
by
TJL
on 17 Jan, 2008 02:15
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I have a question regarding Endeavour in her LON support of Hubble repair mission.
Upon completion of STS-125, will Endeavour be rolled directly from Pad "B" to Pad "A", or back to the VAB first?
Thank you.
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#405
by
shuttlefan
on 17 Jan, 2008 02:32
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TJL - 16/1/2008 9:15 PM
I have a question regarding Endeavour in her LON support of Hubble repair mission.
Upon completion of STS-125, will Endeavour be rolled directly from Pad "B" to Pad "A", or back to the VAB first?
Thank you.
Directly over to Pad A.
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#406
by
Oberon_Command
on 17 Jan, 2008 02:44
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How much does the shuttle depend on the RSS when it's on the pad? When are the RSS's going to be removed from the LC-39 pads?
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#407
by
MKremer
on 17 Jan, 2008 03:37
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Oberon_Command - 16/1/2008 9:44 PM
How much does the shuttle depend on the RSS when it's on the pad?
When are the RSS's going to be removed from the LC-39 pads?
RSS is required for on-pad Shuttle pre-launch servicing access. No RSS, no launch.
The current plans are to wait until after the Ares I-X test flight for 39B to start removing the RSS/FSS, but that schedule may be already up-in-the-air and not confirmed now because of both Shuttle schedule changes, and Ares/Orion development delays.
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#408
by
Jim
on 17 Jan, 2008 04:33
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Oberon_Command - 16/1/2008 10:44 PM
How much does the shuttle depend on the RSS when it's on the pad?
Payload bay access, payload installation, OMBUU access, FRCS access, OMS pod access all done from the RSS
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#409
by
SiameseCat
on 19 Jan, 2008 02:04
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When the RMS is fully rolled-out, what is the angle between it and the vertical? Similarly, what is the angle when the RMS is rolled-in?
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#410
by
Jorge
on 19 Jan, 2008 02:17
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SiameseCat - 18/1/2008 9:04 PM
When the RMS is fully rolled-out, what is the angle between it and the vertical?
19.48 degrees.
Similarly, what is the angle when the RMS is rolled-in?
11.88 degrees.
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#411
by
tnphysics
on 21 Jan, 2008 02:44
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How does the crew abort in the event of an SRB SEP failure on one side? This could cause a tumble and LOCV.
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#412
by
Jorge
on 21 Jan, 2008 03:10
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tnphysics - 20/1/2008 9:44 PM
How does the crew abort in the event of an SRB SEP failure on one side? This could cause a tumble and LOCV.
There are no written procedures for this. The odds of it happening are extremely remote. If it happened, the abort plan would be decided in real-time, assuming the stack does not immediately lose control (which is likely). If the stack does lose control, the crew will follow the LOC/BREAKUP cue card.
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#413
by
yinzer
on 21 Jan, 2008 04:43
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Jorge - 20/1/2008 8:10 PM
There are no written procedures for this. The odds of it happening are extremely remote. If it happened, the abort plan would be decided in real-time, assuming the stack does not immediately lose control (which is likely). If the stack does lose control, the crew will follow the LOC/BREAKUP cue card.
I'd imagine that's a pretty brief cue card.
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#414
by
elmarko
on 21 Jan, 2008 09:42
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Do we even have a copy of that, L2 fans? Which checklist is it in?
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#415
by
Justin Space
on 21 Jan, 2008 10:21
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Jorge - 20/1/2008 10:10 PM
If the stack does lose control, the crew will follow the LOC/BREAKUP cue card.
Do they really need to follow a card about what they must be aware of as the end. I personally find that unthinkable, but I'm not a brave astronaut.
elmarko - 21/1/2008 4:42 AM
Do we even have a copy of that, L2 fans? Which checklist is it in?
Didn't see it via the search term "LOC/BREAKUP" in the ones I thought was obvious (like Malfunctions Checklist), but I'm rubbish at searching for terms in anything. Might be in one of the others, seen as there's lots and lots on there and there's the request form which means you'd get whatever it was on.
Not sure I want to read it though.
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#416
by
Jorge
on 21 Jan, 2008 14:06
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elmarko - 21/1/2008 4:42 AM
Do we even have a copy of that, L2 fans? Which checklist is it in?
It's in the Ascent Checklist. NASA has published it on their site:
http://www.nasa.gov/centers/johnson/pdf/193883main_ASC_120_F_3.pdfThe LOC/BREAK-UP cue card is on p. 219 of the PDF. Short 'n' sweet, here's what it says:
LOC/BREAK-UP
BEFORE ‘GO AT THROTTLEUP’
• GREEN APPLE
LOCK INERTIA REEL
• JETTISON HATCH
• BAILOUT
• PULL RIP CORD
‘GO AT THROTTLEUP’ TO SRB SEP
• GREEN APPLE
LOCK INERTIA REEL
• VENT
• ‘G’ SPIKE
• JETTISON HATCH
v ALT/SUIT
• BAILOUT (BELOW 40 K)
• PULL RIP CORD
AFTER SRB SEP
v TABS/VISOR/GREEN APPLE
LOCK INERTIA REEL
• GO TO MIDDECK
• VENT
• ‘G’ SPIKE
• JETTISON HATCH
v ALT/SUIT
• BAILOUT (BELOW 40 K)
• PULL RIP CORD
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#417
by
Jorge
on 21 Jan, 2008 14:11
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Justin Space - 21/1/2008 5:21 AM
Jorge - 20/1/2008 10:10 PM
If the stack does lose control, the crew will follow the LOC/BREAKUP cue card.
Do they really need to follow a card about what they must be aware of as the end. I personally find that unthinkable, but I'm not a brave astronaut.
No, silly. They follow the card to try to save themselves. The odds aren't great but it beats doing nothing.
elmarko - 21/1/2008 4:42 AM
Do we even have a copy of that, L2 fans? Which checklist is it in?
Didn't see it via the search term "LOC/BREAKUP" in the ones I thought was obvious (like Malfunctions Checklist), but I'm rubbish at searching for terms in anything. Might be in one of the others, seen as there's lots and lots on there and there's the request form which means you'd get whatever it was on.
The Malfunction Procedures book is only for use on-orbit, since by design it contains procedures that take more than five minutes to perform.
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#418
by
on 21 Jan, 2008 23:58
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Anyone know of any chances of a shuttle launch date in the summer of 2009 or 2010?
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#419
by
Lee Jay
on 22 Jan, 2008 00:05
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Yes, there are chances of both, brighter in 2009. But I'm not even sure if there will be a launch in February of 2008 yet! (Sure hope so).
Do they really need to follow a card about what they must be aware of as the end. I personally find that unthinkable, but I'm not a brave astronaut.