TedTAce
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Official STS-117 Thread (S3/S4) And More Arrays!

Sat Dec 23, 2006 11:40 am

Looks like we will have a good bit of time to kick this one around:
http://www.nasa.gov/mission_pages/sh.../shuttlemissions/sts117/index.html

Go Atlantis!!!
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JetBlueGuy2006
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Dec 23, 2006 11:57 am

Beat me to it by 2 minutes, bummer.

Looking forward to STS-117
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TedTAce
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Dec 23, 2006 12:18 pm

Quoting JetBlueGuy2006 (Reply 1):
Beat me to it by 2 minutes, bummer.

Next time I'm going to be in the middle of no where holding my laptop up to catch the faintest WAP signal and clicking on submit the second I hear the double booms!! As long as we keep this a friendly rivalry I think it will serve the board well...
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Array

Thu Dec 28, 2006 1:51 pm

Here's some quick-look data...

Flight: STS-117 (118th flight of the Shuttle)

Mission: International Space Station Mission 13A

Orbiter: Atlantis (28th flight of Atlantis)

Crew: Frederick Sturckow (Commander), Lee Archambault (Pilot), James Reilly, Patrick Forrester, Steven Swanson, John Olivas (Mission Specialists)

Payload: ISS Integrated Truss Structure segments S3 and S4 (solar arrays, 6 battery sets, starboard solar alpha rotary joint)

Launch: ~6:20am ET, Friday, March 16, 2007, Launch Complex 39A

Duration: 11 Days

2007 is shaping up to be an exciting year for Shuttle/Station, with 5 Shuttle assembly flights (March, June, August, October and December) including the return to service of Endeavour, the long-awaited debut of Europe's Automated Transfer Vehicle (June), achievement of US "Core Complete" (at long last, in August), the addition of three new pressurized modules, the debut of the Station-Shuttle Power Transfer System allowing the Shuttles (Endeavour and Discovery) to stay at ISS for an additional 4 days, and the flight of former backup Teacher-in-Space, now full-fledged astronaut Barbara Morgan, on STS-118 in June.
 
zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Dec 28, 2006 10:13 pm

Quoting Thorny (Reply 3):
and the flight of former backup Teacher-in-Space, now full-fledged astronaut Barbara Morgan, on STS-118 in June.

I've got to admire her tenacity. She's been with the program, in various capacities, for 22 years and is still a rookie astronaut. Suffered thru 2 major loss of crew/vehicle accidents. Took the hard road after the Teacher in Space program folded and qualified as a full fledged astronaut. She's unlikely to get another flight assignment after 118. Probably had numerous opportunities to take the easy out and didn't.

Morgan is going to have a BIG ASS smile on her face when she takes the ride out to the pad....  Smile I wonder what she's going to do for Christa while she's on orbit? I believe I heard that she's going to accomplish some portion of the "Teacher in Space" tasks while she's up there.
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TedTAce
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Fri Dec 29, 2006 1:31 pm

Quoting Thorny (Reply 3):
Teacher-in-Space, now full-fledged astronaut Barbara Morgan, on STS-118 in June.



Quoting ZANL188 (Reply 4):
Morgan is going to have a BIG ASS smile on her face when she takes the ride out to the pad....

I think I'm going to be crying like a little girl for her @ MECO and touchdown
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sudden
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Dec 30, 2006 7:11 am

To have something to discuss while waiting,

I was looking at a video on Youtube with a cockpit view during launch of STS-121 and it looked pretty ok, but does anyway know of the G forces on the crew produced during lift off? Very cool video though as you get a good shot of what happens during the 10 first minutes from launch, and the communications.

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zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Dec 30, 2006 7:23 am

Quoting Sudden (Reply 6):
but does anyway know of the G forces on the crew produced during lift off?

I believe the acceleration maxes out at about 3 Gs. Of course I'd say they get a fair amount of vibration while riding the solids, at least it appears that way from the video I've seen.....
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TedTAce
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sun Dec 31, 2006 7:19 am

Quoting ZANL188 (Reply 7):
I believe the acceleration maxes out at about 3 Gs. Of course I'd say they get a fair amount of vibration while riding the solids, at least it appears that way from the video I've seen.....

IRRC they try to keep it under 3. I have also heard that the SME's aren't exactly the smoothest ride going, but yes compared to the SRB's they are nice.
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TheSonntag
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RE: Official STS-117 Thread (S3/S4) And More Array

Sun Dec 31, 2006 7:32 am

Given the enormous amount of propellant being burnt in a very short timeframe, doesn't that mean that the acceleration levels actually rise extremely after some time? I know that both the SRBs and the SSME have no constant power, so that the SRBs have lower thrust some time after launch, but nevertheless the acceleration must rise extremely after some time when all the fuel is burnt, right? I mean, after only 3 minutes probably 80% of the total sytem weight have already been burnt...

And what about the SRB seperation? Do they throttle back before they are dropped? Otherwise I would expect quite a heavy push forward when they are shut down.
 
zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sun Dec 31, 2006 10:25 am

Quoting TheSonntag (Reply 9):
Given the enormous amount of propellant being burnt in a very short timeframe, doesn't that mean that the acceleration levels actually rise extremely after some time? I know that both the SRBs and the SSME have no constant power, so that the SRBs have lower thrust some time after launch, but nevertheless the acceleration must rise extremely after some time when all the fuel is burnt, right? I mean, after only 3 minutes probably 80% of the total sytem weight have already been burnt...

And what about the SRB seperation? Do they throttle back before they are dropped? Otherwise I would expect quite a heavy push forward when they are shut down.

This is really a question for Thorny but I'll give it a whirl.

As you stated both the SRBs and SSMEs change thrust level during flight, primarily a thrust reduction as the shuttle goes thru maximum aerodynamic pressure (often refered to as Max-Q) after which both the SRBs and SSMEs increase thrust -- called "Throttle Up" and if you listen to the air to ground during launch you'll hear the call "Go at Throttle Up".

I understand one of the triggers for SRB jettison is a drop in SRB chamber pressure so yes they would be producing less thrust when they are dropped.

My understanding is the shuttle system is designed specifically to provide a low overall G loading. There are many variables that affect this: shape of the SRB propellant, SSME software, OMS firings, jettisoning the SRBs, ET propellant depletion, etc.
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sun Dec 31, 2006 12:46 pm

Quoting TheSonntag (Reply 9):
Given the enormous amount of propellant being burnt in a very short timeframe, doesn't that mean that the acceleration levels actually rise extremely after some time?

All else being equal yes. But both the SRBs and SSMEs produce varying amounts of thrust depending on the point during ascent. The SSMEs throttle down to 65% thrust during Max Q (T+26 seconds) and then back to 104% around T+60 secs. The SRBs separate when the computers detect chamber pressure has fallen below 50 psi. usually around T+124 secs. After that acceleration on the SSMEs increases until it reaches 3 g's, around T+8 mins, when the SSMEs are again throttled-down to 65% to prevent over stressing the vehicle.
 
sudden
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sun Dec 31, 2006 10:26 pm

Quoting Thorny (Reply 11):
The SSMEs throttle down to 65% thrust during Max Q (T+26 seconds) and then back to 104% around

This is known to me, but is the "Discovery, go for throttle up" gradual up to 104%, or a horse kick in the butt?

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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Mon Jan 01, 2007 12:09 am

Quoting Sudden (Reply 12):
This is known to me, but is the "Discovery, go for throttle up" gradual up to 104%, or a horse kick in the butt?

It takes about 5 seconds to throttle back up, but this is also at the point in flight where atmospheric pressure is working hardest against the stack, so its not a kick in the butt.
 
TheSonntag
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Mon Jan 01, 2007 12:56 am

Quoting Thorny (Reply 13):

What about the time when the SRBs are losing pressure... Does this suddenly reduce the acceleration? How does the SRB thrust vary? I know that on takeoff, they have lots of power, then the acceleration is reduced for some time because of the area of max dynamic pressure. Do they get stronger again afterwards?

My point is, they burn for around 2 minutes as far as I know. You said that the SSME throttle up again at 60 seconds. If the SRBs burn 2 minutes, they have lost probably 40% of their total weight after 60 seconds, correct? Add the fuel burnt from the tank (10 % of the tanks total weight?), the whole system has already become maybe 30-40 % lighter than at takeoff...

If the thrust level of the SRBs remains the same and the SSMEs stay on 100% thrust, this should mean that the thrust is rising extremely until shortly before SRB separation, and dropping considerably then.

I would imagine that the acceleration should vary extremely, how can it be that it is "only" 3Gs?

I am always impressed how much high tech and mathematics are involved in shuttle and rocket launches...
 
zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Mon Jan 01, 2007 1:20 am

Quoting TheSonntag (Reply 14):
How does the SRB thrust vary?

SRB thrust is controlled by varying the propellant surface area available for burning. There is a "hole" if you will thru the SRMs propellant from one end to the other. This hole represents the surface area available to burn propellant. The forward most SRM segment has a "hole" shaped like an 11 point star thus providing more surface area for burning and hence higher initial thrust at liftoff. As burning continues the points of the star burn away, reducing surface area and thrust. As further burning occurs the diameter of the hole increases, providing more surface area, and the thrust increases again.

Quite simple really, but amazing that the thrust can be so precisely controlled in this fashion.
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Array

Mon Jan 01, 2007 2:22 am

Quoting TheSonntag (Reply 14):

I would imagine that the acceleration should vary extremely, how can it be that it is "only" 3Gs?

It doesn't start out at 3 g's, it starts at something like 1.5 g's. The Shuttle is climbing at a steep angle during SRB boost, and this is the lowest, thickest part of the atmosphere, so acceleration isn't great there. Then the Shuttle pitches over at altitude for a shallower climb toward orbit after SRB seperation.

So the acceleration is lessened by the Shuttle's steep climb until the SRBs are gone, then they start the slow acceleration to 3 g's.

A simple way to look at it is that the SRBs provide altitude, the SSMEs provide speed.
 
TheSonntag
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Mon Jan 01, 2007 2:54 am

Quoting Thorny (Reply 16):

Thank you for this explanation. It is really amazing how precise "firecrackers" can be controlled (I know they are high-tech, but it still is solid propellant). I am curious how the next Nasa vehicles will look like. Something tells me the current plans are not really the last word yet.

Just one question, during the last mission shortly after SRB seperation, there were some extra engines which burned for a minute or so. I know this was a very heavy payload, but aren't these extra engines (was it the OMS?) pretty weak actually?
 
Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Mon Jan 01, 2007 7:31 am

Quoting TheSonntag (Reply 17):
Just one question, during the last mission shortly after SRB seperation, there were some extra engines which burned for a minute or so. I know this was a very heavy payload, but aren't these extra engines (was it the OMS?) pretty weak actually?

Yes, that's the OMS Assist maneuver, introduced for the heavy Space Station missions. NASA historically didn't usually fill the OMS tanks to capacity for each mission, but only filled the tanks with what they'd need plus a small reserve.

Someone had the idea of filling the tanks with extra propellant and firing the engines on the way up until the prop level was back to the level for the planned mission. It doesn't provide a lot of thrust, but every little bit helps for the high-inclination Station missions.
 
RHAnthony
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Tue Jan 02, 2007 4:22 pm

I don't want to totally hijack this thread, but looks like it's turned into a propulsion discussion already so I have to ask something thats nagged at me since I started watching the shuttles fly years ago, but never had an answer to.

The engines throttle up to 104%. How? Wouldn't max output be 100%? Where does the other 4% come from?
 
zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Tue Jan 02, 2007 10:10 pm

Quoting Rhanthony (Reply 19):
The engines throttle up to 104%. How? Wouldn't max output be 100%? Where does the other 4% come from?

100% is the original rated thrust of the engine. Thru testing and analysis it was determined that the engine could be run at the higher power level.

How? Within limits, cram in as much fuel and oxidizer as possible. The more fuel burned the more thrust produced.

FYI: There have been projects in place to raise power levels to 104%, 106%, 109%, and 120% of rated thrust. 109 was almost achieved in the original block I engines but this was reconsidered after the Challenger accident. I believe the block II engines being used now are certified for 109 but I haven't heard of them being used at that rating.
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sudden
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Wed Jan 03, 2007 12:23 am

By the way,

The link to the video I was talking about above is
http://www.youtube.com/watch?v=HsTKxnzggkg

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RHAnthony
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Wed Jan 03, 2007 2:10 pm

Okay, I get it. It's 104% to the ORIGINAL SPECs laid out for the engines? Not the real possible output? That makes sense.

Thanks for clearing that up... I honestly have NEVER found an readable answer for that in the past.
 
zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Jan 04, 2007 9:15 am

Quoting RHAnthony (Reply 22):
Okay, I get it. It's 104% to the ORIGINAL SPECs laid out for the engines? Not the real possible output? That makes sense.

I think the engineers did it that way to make it easier to compare different models of the engine at different altitudes. The same engine producing 104% at liftoff is producing considerably more thrust at engine cutoff even though it's still at 104% power rating, i.e. the engine produces more thrust in a vacuum than at sea level. So it makes more sense to refer to a percent of max power rather than actual thrust produced.

Quoting RHAnthony (Reply 22):
Thanks for clearing that up...

Glad to help, it made me think a bit....

edit: added engine performance numbers... (per engine)

100% of rated power:

Sea Level Thrust: 375,000 lbf
Vacuum Thrust: 470,000 lbf
Liquid Oxygen (per second): 889 lbs
Liquid Hydrogen (per second): 146 lbs

104% of rated power:

Sea Level Thrust: 393,800 lbf
Vacuum Thrust: 488,800 lbf
Liquid Oxygen (per second): 933 lbs
Liquid Hydrogen (per second): 155 lbs


[Edited 2007-01-04 01:21:10]

[Edited 2007-01-04 01:23:49]
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sudden
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Jan 06, 2007 1:17 am

Hi,

Might be a clear answer to some,

but are the above figures for the SRB's, the SSMEs, or a total engine thrust?

Thanks.

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zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Jan 06, 2007 6:16 am

Quoting Sudden (Reply 24):
but are the above figures for the SRB's, the SSMEs, or a total engine thrust?

The SRBs have solid rocket motors. The orbiter has Space Shuttle Main Engines (SSME). All the references to percent of power rating refer to the engines. References to a liquid fuel are applicable to the engines.

You're Welcome...
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RHAnthony
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Mon Jan 08, 2007 1:54 pm

It's my understanding, of course it could be incorrect, that the SRB motors are designed to have their outputs controlled by the shape/size of the surface area burning inside of the motor. Thats not controlled by anything other than the design of the motor, and it isn't dynamically adjusted during flight, correct? I read somewhere it's designed to give outputs required, down to the second of flight duration, but doesn't require/involve any outside commands as it's all "built into" the design...

So in effect, they are always at 100% of designed output. Is this correct?
 
Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Mon Jan 08, 2007 11:11 pm

Quoting RHAnthony (Reply 26):
So in effect, they are always at 100% of designed output. Is this correct?

No, because more thrust is generated at some points than at other points. They can't all be the maximum thrust the SRB is capable of generating.
 
SNA350
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Tue Jan 09, 2007 3:28 pm

I understand this is the first launch from pad 39A in a long time, and STS 116 was the last shuttle flight ever from 39B.

Why don't they use the 2 pads continuously?
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Boeing4ever
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Tue Jan 09, 2007 4:07 pm

Quoting Sna350 (Reply 28):
I understand this is the first launch from pad 39A in a long time, and STS 116 was the last shuttle flight ever from 39B.

Why don't they use the 2 pads continuously?

One of the pads needs to be shut down to begin conversion for launching of the Ares rockets as part of the Constellation program which will follow STS.

http://www.nasa.gov/mission_pages/constellation/main/index.html

 airplane B4e-Forever New Frontiers airplane 
 
Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Tue Jan 09, 2007 11:25 pm

Quoting Sna350 (Reply 28):
I understand this is the first launch from pad 39A in a long time, and STS 116 was the last shuttle flight ever from 39B.

Why don't they use the 2 pads continuously?

39A was down for an extensive overhaul (the last vestiges of the old Apollo-era hammerhead crane on top are now gone, for example). 39B would have begun its own overhaul had the Shuttle program been scheduled to continue beyond 2010 (this is seaside Florida, corrosion control is a major problem.)

Instead, 39B will be held in a standby condition until after the Hubble Space Telescope servicing mission next year, and will then be radically redesigned to acommodate the Ares I launcher for Project Constellation (the giant Rotating Service Structure will be torn down, for example). We'll see construction of four tall lightning rod masts around 39B begin later this year, but the pad itself won't have much done to it until late 2008.
 
SNA350
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Wed Jan 10, 2007 3:18 pm

thanks for the answers

but did NASA use the 2 pads together in the early shuttle days or was it the same procedure as now: 1 in service and 1 in overhaul?
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Wed Jan 10, 2007 11:20 pm

Quoting SNA350 (Reply 31):
but did NASA use the 2 pads together in the early shuttle days or was it the same procedure as now: 1 in service and 1 in overhaul?

Yes.  Smile

There were periods when both pads were in service at the same time, the first being STS-61C and STS-51L in early 1986, the last being STS-106 and STS-92 in 2000.

It looks like Atlantis will launch on the Hubble mission from 39A on September 11, 2008 while Discovery is on 39B ready for a rescue launch 7 days later, if necessary. It is unclear if Discovery will remain on 39B and launch from there on its normal next mission (STS-126) or if she'll transfer to 39A.
 
RHAnthony
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Jan 11, 2007 5:55 pm

I think this would be an INCREDIBLE opportunity for someone to get some photos of 2 stacks ready to go at the same time! I certainly hope a lot of the photographers from this site make a try to get there...

I'm actually trying to plan on having my family vacation land about this time, so we can see a launch in person.
 
Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Jan 11, 2007 11:18 pm

Quoting RHAnthony (Reply 33):
I think this would be an INCREDIBLE opportunity for someone to get some photos of 2 stacks ready to go at the same time!

STS-35 Columbia on Pad A (foreground) during launch of STS-31 Discovery from Pad B (background) on April 24, 1990...

http://images.jsc.nasa.gov/luceneweb/fullimage.jsp?photoId=S90-44867

STS-35 Columbia on Pad A (foreground) and STS-41 Discovery on Pad B (background) on September 24, 1990. Columbia is being readied for launch the next day (scrubbed) and Discovery has just rolled out. This is the only time two Shuttles were both on their pads and both exposed, not surrounded by their Rotating Service Structures...

http://images.jsc.nasa.gov/luceneweb/fullimage.jsp?photoId=S90-48904

The second photo was taken at the height of the hydrogen leak fiasco of 1990, in which Columbia's STS-35 and Atlantis' STS-38 were delayed all summer. STS-35 finally launched after STS-38 and STS-41, on December 2, 1990. The trouble was traced to fuel line contamination at Pad A.
 
SNA350
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Fri Jan 12, 2007 5:56 pm

where there ever 2 shuttles in space at the same time?
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RHAnthony
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Fri Jan 12, 2007 10:53 pm

Anyone know if Atlantis will sit on the pad un-covered during the launch of Discovery come Sept 11 2007? If so, someone better have a camera ready!
 
Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Fri Jan 12, 2007 11:07 pm

Quoting SNA350 (Reply 35):
where there ever 2 shuttles in space at the same time?

No. The closest was one week between the landing of STS-71 Atlantis and the launch of STS-70 Discovery in 1995.

Quoting RHAnthony (Reply 36):
Anyone know if Atlantis will sit on the pad un-covered during the launch of Discovery come Sept 11 2007?

2008, and Atlantis will launch first. NASA might take a "last chance, once more for posterity" photo opportunity and roll back Atlantis's RSS at 39A so we can see both vehicles when Discovery reaches 39B, but I doubt they'd expose Discovery during Atlantis's launch. They'll be too busy readying Discovery for a possible rescue launch just seven days later.

I think much will depend on how the schedule is going in 2008. NASA is aiming for 4 flights in 2007 and 6 flights in 2008 now, instead of 5 in each.
 
TedTAce
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Jan 13, 2007 12:34 pm

Quoting Thorny (Reply 37):
NASA is aiming for 4 flights in 2007

Is the October launch looking to be a night launch or?
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Jan 13, 2007 2:31 pm

Quoting TedTAce (Reply 38):
Is the October launch looking to be a night launch or?

It's not yet official, but there will be no October launch.

The current schedule...

2007 Mar 16: STS-117 Atlantis (ITS S3/S4)
2007 Jun 28: STS-118 Endeavour (ITS S5, Spacehab)
2007 Sep 7: STS-120 Atlantis (Node 2)
2007 Nov 5: STS-122 Discovery (Columbus)

The delay to November was at the request of the Space Station program... evidently conflicts with a Soyuz flight. I think the March 16 (perhaps March 15) launch will be just before dawn. Its too soon to say whether the November flight will be day or night, but my guess would be night.
 
TedTAce
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sat Jan 13, 2007 2:49 pm

Quoting Thorny (Reply 39):
It's not yet official, but there will be no October launch.

I was reading: http://www.space.com/missionlaunches/launches/launch_schedule.html

Considering you have proven yourself to be a great source of information, all I have to say is FLUCK !!!  Sad

March 16th though..... humm.... looks like I'll be taking a 3 day weekend...
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zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Tue Jan 16, 2007 2:21 am

FYI:

If anyone is interested in the current manifest to fly out the shuttle program....

http://images.spaceref.com/news/2007/FAWG.2007.01.02.pdf
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Jan 25, 2007 9:06 am

The STS-117 launch target date is now officially Thursday, March 15.

As usual, the actual launch date will not be formally selected until the Launch Readiness Review (in this case, late next month.)
 
TedTAce
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Jan 25, 2007 12:55 pm

Quoting Thorny (Reply 42):
Thursday, March 15.

Time Please?
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Jan 25, 2007 11:31 pm

Quoting TedTAce (Reply 43):
Quoting Thorny (Reply 42):
Thursday, March 15.

Time Please?

6:43am EDT
 
TedTAce
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Jan 25, 2007 11:40 pm

Quoting Thorny (Reply 44):
6:43am EDT

About 30 min before twilight : oh well, depending on the wx; I'll probably shoot it from Altamonte Springs.
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Thu Feb 08, 2007 9:01 am

Atlantis is now in the Vehicle Assembly Building, to be mated with her External Tank and Solid Rocket Boosters.

Rollout to newly renovated Launch Pad 39A is scheduled for the morning of Wednesday, 14 Feb.

Liftoff remains targeted for Thursday, 15 Mar.
 
zanl188
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sun Feb 11, 2007 7:26 am

Here's an interesting shot of Atlantis hanging vertically in its lift rig prior to being lifted into the high bay and mated to its ET & SRBs....

http://www.nasa.gov/images/content/169070main_shuttle_vertical.jpg

You gotta love the guy walking nonchalantly by the tail paying no mind whatsoever to 150K lbs of reusable spacecraft hanging from the ceiling just to his left...

...And how close is that tail to the VAB floor anyway?  

edit: punctuation

[Edited 2007-02-10 23:30:45]
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TedTAce
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Sun Feb 11, 2007 12:01 pm

Quoting ZANL188 (Reply 47):
And how close is that tail to the VAB floor anyway?

Too close, but nobody is really asking me.
Great Pic... I wish I had his problem of treating such a spectale as commonplace.
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Thorny
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RE: Official STS-117 Thread (S3/S4) And More Arrays!

Fri Feb 16, 2007 8:50 am

STS-117 Atlantis is now on Launch Pad 39A, one day behind schedule due to a pressure sensor failure in the starboard SRB. This is not expected to impact the March 15 launch date.

Meanwhile, Atlantis' subsequent flight (STS-120) has been advanced on the schedule from Sep 7 to Aug 26 to enable daylight launch photography of the External Tank, which will be the first flight of the improved Ice/Frost Ramp design.

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