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#2360
by
alk3997
on 19 Oct, 2011 02:19
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Yes, it's exactly what Jorge said. The SRB and SSME nozzles gimbaled to allow the vehicle to steer. Those were the only steering mechanisms during ascent. So, if a change in the attitude of the vehicle was needed, the GPCs would command the proper nozzle movement to make the desired attitude change. As you might expect the roll maneuver caused a significant attitude change.
Andy
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#2361
by
wolfpack
on 19 Oct, 2011 14:59
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Where exactly does the ET bipod attach the orbiter? The aft attachments are with the fuel and oxidizer feedlines, which have umbilical doors. Where was the forward one, and how was it protected thermally? I don't remember ever seeing another door near the nose gear.
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#2362
by
Jim
on 19 Oct, 2011 15:25
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Where exactly does the ET bipod attach the orbiter? The aft attachments are with the fuel and oxidizer feedlines, which have umbilical doors. Where was the forward one, and how was it protected thermally? I don't remember ever seeing another door near the nose gear.
It is below the "skinline" of the TPS. It is just a "hole" for a stud to pass through.
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#2363
by
DaveS
on 21 Oct, 2011 16:08
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Does anyone know how many degrees the orbiter Ku band DA rotates around its hinge attachment to the payload bay to the deployed position?
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#2364
by
Namechange User
on 21 Oct, 2011 16:19
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Where exactly does the ET bipod attach the orbiter? The aft attachments are with the fuel and oxidizer feedlines, which have umbilical doors. Where was the forward one, and how was it protected thermally? I don't remember ever seeing another door near the nose gear.
It is below the "skinline" of the TPS. It is just a "hole" for a stud to pass through.
The arrowhead is also made of RCC
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#2365
by
Namechange User
on 21 Oct, 2011 16:19
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Does anyone know how many degrees the orbiter Ku band DA rotates around its hinge attachment to the payload bay to the deployed position?
If I understand your question correctly, it is essentially 180 degrees.
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#2366
by
mkirk
on 21 Oct, 2011 16:28
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Does anyone know how many degrees the orbiter Ku band DA rotates around its hinge attachment to the payload bay to the deployed position?
I may not be clear on exactly what you are asking but a quick look in the KU Ops Workbook shows 113 degrees to the deployed state. Should also be a diagram in the SCOM (Comm Section) if you don't have a copy of that workbook.
Mark Kirkman
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#2367
by
AnalogMan
on 21 Oct, 2011 16:33
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Does anyone know how many degrees the orbiter Ku band DA rotates around its hinge attachment to the payload bay to the deployed position?
I may not be clear on exactly what you are asking but a quick look in the KU Ops Workbook shows 113 degrees to the deployed state. Should also be a diagram in the SCOM if you don't have a copy of that workbook
Mark Kirkman
Not sure where I grabbed this from, but its probably the diagram referred to.
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#2368
by
DaveS
on 21 Oct, 2011 16:35
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Does anyone know how many degrees the orbiter Ku band DA rotates around its hinge attachment to the payload bay to the deployed position?
I may not be clear on exactly what you are asking but a quick look in the KU Ops Workbook shows 113 degrees to the deployed state. Should also be a diagram in the SCOM if you don't have a copy of that workbook
Mark Kirkman
Yes, I have seen that figure but it is measured from alpha gimbal-stowed to alpha gimbal-deployed, not around the hinge itself, which is what I'm looking for.
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#2369
by
mkirk
on 25 Oct, 2011 22:11
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Does anyone know how many degrees the orbiter Ku band DA rotates around its hinge attachment to the payload bay to the deployed position?
I may not be clear on exactly what you are asking but a quick look in the KU Ops Workbook shows 113 degrees to the deployed state. Should also be a diagram in the SCOM if you don't have a copy of that workbook
Mark Kirkman
Yes, I have seen that figure but it is measured from alpha gimbal-stowed to alpha gimbal-deployed, not around the hinge itself, which is what I'm looking for.
Is this any help?
"a/b Gimbal
The beta gimbal is mounted on the alpha gimbal housing, which, in turn, is mounted on the frame into which the DEA (Deployed Electronics Assembly) fits. Both dc gimbal motors are identical but the beta, or inner, gimbal is limited in its motion from -85° to +75°. The alpha, or outer, gimbal motion is from -206° to +154°. The antenna coordinate system 0,0 reference is up the minus Z body axis. Two drive signals (1 and 2) are provided from the gimbal servodrive
circuits in the Interface and Control Unit and provide for positive or negative motion about the gimbal axis. An encoder disc is mounted on each motor shaft and provides motor position information. The digital output (0.088° resolution) resets a storage buffer in the Interface and Control Unit every time a Master Index Pulse (MIP) is encountered. There is one MIP on each gimbal encoder."
I found it in the INCO Sys Briefs. My only other suggestion would be to ask someone to look in the SSSH (space shuttle systems handbook) for you - I'm almost certain there is a diagram of it in there. I only have a paper copy of the SSSH and that is at home (a place I wont see for at least 2 or 3 more weeks). However, anyone with internal web access should be able to look at the electronic version.
I'm sorry I can't be much more help but I am woefully ignorant of the comm system details - I was always content with knowing "panel command" when it came to shuttle comm.
Mark Kirkman
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#2370
by
Ronsmytheiii
on 02 Nov, 2011 14:48
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Why is Atlantis stacked in this shot during 1987 without SSME's?
http://spaceflight.nasa.gov/gallery/images/shuttle/sts-27/html/s87-31470.html(13 March 1987) --- The Space Shuttle Atlantis is transferred from the giant Vehicle Assembly Building's high bay 1 to high bay 3 as preparations for de-stacking of the orbiter begin. The orbited will be separated from its solid rocket boosters and external fuel tank before being taken to the Orbiter Processing Facility. Once there, it will begin an extended processing flow to undergo return-to-flight modifications and other preparations for the STS-27 mission next year.
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#2371
by
JayP
on 02 Nov, 2011 14:58
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Why is Atlantis stacked in this shot during 1987 without SSME's?
http://spaceflight.nasa.gov/gallery/images/shuttle/sts-27/html/s87-31470.html
(13 March 1987) --- The Space Shuttle Atlantis is transferred from the giant Vehicle Assembly Building's high bay 1 to high bay 3 as preparations for de-stacking of the orbiter begin. The orbited will be separated from its solid rocket boosters and external fuel tank before being taken to the Orbiter Processing Facility. Once there, it will begin an extended processing flow to undergo return-to-flight modifications and other preparations for the STS-27 mission next year.
This was during the stand down after Challenger. They had stacked the orbiter and rolled it out to 39B to fit check the new weather protection system that had been installed and do some tests of the emergency egress procedures.
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#2372
by
TFGQ
on 03 Nov, 2011 17:37
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got a picture of it at pad 39-B?
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#2373
by
Ronsmytheiii
on 03 Nov, 2011 18:51
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got a picture of it at pad 39-B?
THere is this one, but due to the angle cannot really see the lack of SSME's:
http://spaceflight.nasa.gov/gallery/images/shuttle/sts-27/html/s86-38627.htmlThe Space Shuttle Atlantis is rolled out to Launch Pad 39-B in the early morning of Oct. 9, 1986. Atlantis is scheduled to remain at Pad B for seven weeks where it will support checkout of new weather protection structures, a variety of special measurements, launch team proficiency exercises and emergency egress simulations. The 4.2 mile journey from the Vehicle Assembly Building to the launch pad is the first for the shuttle fleet since the Space Shuttle Challenger accident in January of this year.
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#2374
by
NavySpaceFan
on 05 Nov, 2011 15:00
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Folks, I'm looking for the start and stop times for STS-57's single EVA. I know the total elapsed time was 5 hours, 50 minutes, but I cannot for the life of me find when it started or stopped (GMT or MET). Thanks!
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#2375
by
TJL
on 05 Nov, 2011 20:58
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Folks, I'm looking for the start and stop times for STS-57's single EVA. I know the total elapsed time was 5 hours, 50 minutes, but I cannot for the life of me find when it started or stopped (GMT or MET). Thanks!
Started EVA at 3:23:59:51 MET
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#2376
by
NavySpaceFan
on 05 Nov, 2011 22:42
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Folks, I'm looking for the start and stop times for STS-57's single EVA. I know the total elapsed time was 5 hours, 50 minutes, but I cannot for the life of me find when it started or stopped (GMT or MET). Thanks!
Started EVA at 3:23:59:51 MET
Thanks!!!
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#2377
by
jeff122670
on 05 Nov, 2011 23:16
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Why is Atlantis stacked in this shot during 1987 without SSME's?
http://spaceflight.nasa.gov/gallery/images/shuttle/sts-27/html/s87-31470.html
(13 March 1987) --- The Space Shuttle Atlantis is transferred from the giant Vehicle Assembly Building's high bay 1 to high bay 3 as preparations for de-stacking of the orbiter begin. The orbited will be separated from its solid rocket boosters and external fuel tank before being taken to the Orbiter Processing Facility. Once there, it will begin an extended processing flow to undergo return-to-flight modifications and other preparations for the STS-27 mission next year.
also, i remember there was a "discussion" about if the sharp turn out to 39B might have caused the stack to shift slightly and open up the o-rings on 51-L....i think this was more "what-if" but i thought i was worth mentioning.....
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#2378
by
sivodave
on 16 Nov, 2011 21:45
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Hi all.
this kind I have kind of "silly" question. I find quite curiuos the software for the shuttle was written in a language called HAL/S running on IBM computers. As it's known HAL is the name of the computer on 2001: A Space Odyssey and it's an implict reference to IBM (every letter in HAL is the letter soon after each letter in IBM).
I'd like to know is there is any particular reason for which language for the shuttle software was named HAL.
Thanks very much
Davide
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#2379
by
AnalogMan
on 16 Nov, 2011 22:16
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Hi all.
this kind I have kind of "silly" question. I find quite curiuos the software for the shuttle was written in a language called HAL/S running on IBM computers. As it's known HAL is the name of the computer on 2001: A Space Odyssey and it's an implict reference to IBM (every letter in HAL is the letter soon after each letter in IBM).
I'd like to know is there is any particular reason for which language for the shuttle software was named HAL.
It was named as a tribute to Dr. J Halcombe "Hal" Laning.
Advanced Vehicle Automation and Computers
Aboard the ShuttleDennis Jenkins
"A variation of a the HAL language, called HAL/S, was created specifically for the Shuttle project by Intermetrics, Incorporated, a Massachusetts company founded in 1969 by five M.I.T. programmers who had worked on developing software for Apollo. The name was a tribute to computer pioneer J. Halcombe Laning, who had invented an algebraic compiler in 1952 that ran on the M.I.T. Whirlwind—the first real-rime computer. The ‘S’ appended to the name has been variously explained as meaning “subset” (of what is unclear) or "Shuttle," and it is left to the reader to determine which is most fitting."http://history.nasa.gov/sts1/pages/computer.html
