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#740
by
el_nino
on 07 Aug, 2007 19:06
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shuttlefan - 7/8/2007 1:52 PM
Also in 1996 on STS-79, some of the nozzle insulation was eroded but prior to the next flight, STS-80, they took care of it.
Was this the same problem that nearly caused disaster on STS-8?
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#741
by
LSainsbury
on 08 Aug, 2007 12:21
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Hey all,
Just joined up on L2 so awaiting the launch later today!
I have a question: Have there been any missions that have nearly invoked an abort option like RTLS, or any of the other abort options?
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#742
by
Jim
on 08 Aug, 2007 12:26
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51-F ATO
I corrected my error
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#743
by
psloss
on 08 Aug, 2007 12:27
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There was an ATO on STS-51F and they've taken "hits" to redundancy a few times in first stage.
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#744
by
LSainsbury
on 08 Aug, 2007 12:30
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What are the chances of an RTLS during launch? I don't think any have occurred so far, what are the chances of one happening during the rest of the STS's life?
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#745
by
shuttlefan
on 08 Aug, 2007 12:41
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LSainsbury - 8/8/2007 7:30 AM
What are the chances of an RTLS during launch? I don't think any have occurred so far, what are the chances of one happening during the rest of the STS's life?
No RTLS has ever ocurred. The chances of one ocurring during the rest of the program are very small.
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#746
by
Lee Jay
on 08 Aug, 2007 13:54
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Is tank fill/tank topping stopped before engine start at t-6.6 seconds, or do the tanks continue to receive propellant while the engines are running?
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#747
by
Jim
on 08 Aug, 2007 14:01
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Lee Jay - 8/8/2007 9:54 AM
Is tank fill/tank topping stopped before engine start at t-6.6 seconds, or do the tanks continue to receive propellant while the engines are running?
Replenishing ends earlier in the count. LO2 at 4:55 and LH2 at 1:57
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#748
by
Lee Jay
on 08 Aug, 2007 14:17
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Jim - 8/8/2007 8:01 AM
Lee Jay - 8/8/2007 9:54 AM
Is tank fill/tank topping stopped before engine start at t-6.6 seconds, or do the tanks continue to receive propellant while the engines are running?
Replenishing ends earlier in the count. LO2 at 4:55 and LH2 at 1:57
Wow...that's kind of early. Is this done so early in order to stabilize tank pressure for launch, or is there some other reason?
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#749
by
Jim
on 08 Aug, 2007 14:30
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yes
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#750
by
brahmanknight
on 08 Aug, 2007 17:54
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What is the 36 wheeled transporter named that moves the shuttle from OMF to VAB?
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#751
by
DaveS
on 08 Aug, 2007 18:19
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brahmanknight - 8/8/2007 7:54 PM
What is the 36 wheeled transporter named that moves the shuttle from OMF to VAB?
1: It has 76 wheels
2: It's OPF, not OMF
3: It's called the Orbiter Transporter System or OTS for short.
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#752
by
Lee Jay
on 08 Aug, 2007 18:52
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How much extra performance do they get out of the SRBs on hot days versus cold days? Are we talking fractions of a percent or single digit percentages?
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#753
by
mkirk
on 08 Aug, 2007 18:59
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I just found in my launch handbook a note that says the SRB sensitivity to temperature is 4,750 lbs of thrust per 1 degree F.
But it also says that max thrust (vacuum) at 60 degrees F is 3,160,498 lbs and at 90 degrees F it is 3,306,190 lbs.
Mark Kirkman
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#754
by
Lee Jay
on 08 Aug, 2007 19:12
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Wow...so we're talking on the order of 5%. I would have guessed less, but that's why I asked! Thanks for digging that up.
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#755
by
kneecaps
on 08 Aug, 2007 20:28
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C/W Alarm sounds
I've created these with a tone generator based on what the Shuttle Crew Operations manual says they sound like (frequencies and times).
I've heard the SM and Class 2 alarms direct from nasa sources (background during missions)..so I think they are fine...but I can't vouch for the class 1's ....
EDIT: Siren has been updated... joshb noticed it was wrong vs spec
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#756
by
joshb
on 08 Aug, 2007 20:46
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Thanks kneecaps
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#757
by
Andy_Small
on 08 Aug, 2007 20:48
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joshb - 8/8/2007 3:46 PM
Thanks kneecaps
INDEED! Thank you
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#758
by
Jim
on 08 Aug, 2007 21:52
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Mark Kirkman would have to make the final call, but they don't sound like what I have heard
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#759
by
mkirk
on 08 Aug, 2007 21:55
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Jim - 8/8/2007 4:52 PM
Mark Kirkman would have to make the final call, but they don't sound like what I have heard
I have all my players streaming video/data right now so I will have to listen to them post launch...those sounds are burned into my brain as I am sure they are for a couple of other folks here so we should be able to judge them acurately.
Mark Kirkman
