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#1340
by
JayP
on 14 Sep, 2010 19:31
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Does anyone know what the yellow electronics(?) box in the screenshot is used for?
Do you have the contex of the photo? All I can tell is that there is a ET in the vertical position in the background. Is the photo from Michoud, a checkout cell in the VAB or a stacking bay?
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#1341
by
DaveS
on 14 Sep, 2010 19:42
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Does anyone know what the yellow electronics(?) box in the screenshot is used for?
Do you have the context of the photo? All I can tell is that there is a ET in the vertical position in the background. Is the photo from Michoud, a checkout cell in the VAB or a stacking bay?
H/B-4 ET checkout cell. The ET is ET-137 being prepared for lift-to-mate with the SRBs in H/B-3.
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#1342
by
bidptl
on 15 Sep, 2010 14:46
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I know thi smust have been covered before but it would take me too long to dig it out from the 5 parts of Q&A.
is there a reason why payload are installed at the launch pad and not at the OPF before rollover and mate, or at the VAB before rollout ?
thanks in advance ....
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#1343
by
Jim
on 15 Sep, 2010 14:56
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I know thi smust have been covered before but it would take me too long to dig it out from the 5 parts of Q&A.
is there a reason why payload are installed at the launch pad and not at the OPF before rollover and mate, or at the VAB before rollout ?
thanks in advance ....
A. VAB doesn't have a clean room
b. the DOD had a requirement for late as possible installation.
c. Most payloads like a vertical orientation
d. The payload would spend months in the orbiter if installed at the OPF
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#1344
by
Namechange User
on 15 Sep, 2010 21:06
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I know thi smust have been covered before but it would take me too long to dig it out from the 5 parts of Q&A.
is there a reason why payload are installed at the launch pad and not at the OPF before rollover and mate, or at the VAB before rollout ?
thanks in advance ....
A. VAB doesn't have a clean room
b. the DOD had a requirement for late as possible installation.
c. Most payloads like a vertical orientation
d. The payload would spend months in the orbiter if installed at the OPF
And another REALLY big reason, you do not want to lift an expensive payload and an expensive orbiter together. Not only for lift-crane mass reasons but also in the event something happens you don't damage both.
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#1345
by
bidptl
on 16 Sep, 2010 02:14
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ar see ... many thanks Jim and OV106. Appreciated.
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#1346
by
Space Pete
on 17 Sep, 2010 12:42
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I know thi smust have been covered before but it would take me too long to dig it out from the 5 parts of Q&A.
is there a reason why payload are installed at the launch pad and not at the OPF before rollover and mate, or at the VAB before rollout ?
thanks in advance ....
Also, some payloads require power from the Orbiter (such as the MPLM, which takes power through the ROEU). If the payloads were installed in the OPF, then the Orbiter would have to power them for months before liftoff.
Plus, all the perishable goods (called late stow items) inside the MPLM would rot away before launch.
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#1347
by
MBK004
on 26 Sep, 2010 07:36
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I have noticed that Atlantis has never carried an MPLM. Is there a technical reason why not or was it just luck of the draw? Thanks.
Pure luck of the draw, she was configured and even rolled over the the VAB twice for STS-114 pre-Columbia and STS-121 before it was reassigned to Discovery.
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#1348
by
Endeavour126
on 29 Sep, 2010 18:54
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Is there anybody knows how long it takes to traslate the payload from the changeout room to payload bay?
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#1349
by
Jim
on 29 Sep, 2010 19:23
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Is there anybody knows how long it takes to traslate the payload from the changeout room to payload bay?
Minutes
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#1350
by
dave k
on 30 Sep, 2010 13:58
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I have been looking at this every day for awhile on the KSC video feeds. Does anyone have a hi res photo of this wall?
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#1351
by
Endeavour126
on 30 Sep, 2010 16:15
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Is there anybody knows how long it takes to traslate the payload from the changeout room to payload bay?
Minutes
Thank you Jim.
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#1352
by
usn_skwerl
on 02 Oct, 2010 17:23
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Why does Harwood and/or NASA say the shuttle launches from a starting altitude of 23 ft below sea level?
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#1353
by
AnalogMan
on 02 Oct, 2010 20:18
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Why does Harwood and/or NASA say the shuttle launches from a starting altitude of 23 ft below sea level?
This is a footnote from a table of ascent data produced by NASA in one of their "Math and Science @ Work" publications:
"Note: Notice from the table that the altitude is negative at liftoff. Zero altitude can be described as a specific distance from the center of the Earth. Since the Earth is not perfectly spherical the location of the launch just happens to be below this specified point. Also, because this is a calculated number, some degree of error may be present."http://www.nasa.gov/pdf/466711main_AP_ST_ShuttleAscent.pdf
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#1354
by
MP99
on 03 Oct, 2010 11:34
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Why does Harwood and/or NASA say the shuttle launches from a starting altitude of 23 ft below sea level?
This is a footnote from a table of ascent data produced by NASA in one of their "Math and Science @ Work" publications:
"Note: Notice from the table that the altitude is negative at liftoff. Zero altitude can be described as a specific distance from the center of the Earth. Since the Earth is not perfectly spherical the location of the launch just happens to be below this specified point. Also, because this is a calculated number, some degree of error may be present."
http://www.nasa.gov/pdf/466711main_AP_ST_ShuttleAscent.pdf
Velocity is defined as the rate of change of the vertical position.
The resulting orbital velocity is horizontal, not vertical.
cheers, Martin
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#1355
by
DaveS
on 04 Oct, 2010 04:39
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How is the AoA maintained through entry? Is it only done by the elevons or does the bodyflap as I suspect help out?
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#1356
by
Jim
on 04 Oct, 2010 11:03
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How is the AoA maintained through entry? Is it only done by the elevons or does the bodyflap as I suspect help out?
both
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#1357
by
DaveS
on 04 Oct, 2010 11:22
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How is the AoA maintained through entry? Is it only done by the elevons or does the bodyflap as I suspect help out?
both
Thanks. So, alone the elevons cannot maintain the 40° AoA and needs the assistance from the bodyflap? Is that correct?
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#1358
by
David413
on 04 Oct, 2010 12:46
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The bodyflap positioning during entry is a function of mach number. The bodyflap position is used primarily to keep the elevons within a given range of operation and prevent "saturation".
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#1359
by
padrat
on 04 Oct, 2010 16:30
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Is there anybody knows how long it takes to traslate the payload from the changeout room to payload bay?
Minutes
um, just curious, how do you figure minutes? If you're talking installing into the orbiter from the PCR, quite a bit more than minutes