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Old 31st August 2022, 04:43 PM   #81
Jim_MDP
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Originally Posted by jadebox View Post
Yes, all of those other things have to be considered plus other things like the availability of people working on the program.
Nobody's askin' for the day off.

.
(Oooh... CT time, suspect the guy who skipped work today. )

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Old 31st August 2022, 10:52 PM   #82
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NASA’s Next Launch Attempt for Artemis I Will Occur September 3

Quote:
The agency announced today (Aug. 30) that it's now targeting Saturday (Sept. 3) for the launch of Artemis 1, a crucial mission whose first liftoff attempt on Monday (Aug. 29) was scuttled by a technical issue.

If all goes according to plan, Artemis 1 will launch from Pad 39B at NASA's Kennedy Space Center (KSC) in Florida during a two-hour window that opens at 2:17 p.m. EDT (1817 GMT).
That'll be at 3:17 AM my time, so I won't try to stay up and watch it, but I hope it goes well.

As for the cause of the issue:
Quote:
The Artemis 1 team couldn't troubleshoot the issue in time during Monday's countdown, so the launch attempt was called off. But Honeycutt and others on the mission team think they have a handle on it now: They suspect it boils down to a faulty temperature sensor on Engine 3.

"I think we understand the physics about how hydrogen performs, and the way the sensor is behaving doesn't line up with the physics of the situation," Honeycutt said during this evening's press conference. Readings from other sensors suggested that Engine 3 was getting appropriate levels of liquid hydrogen during the bleed, he added.

Replacing the sensor would likely require rolling the Artemis 1 stack off Pad 39B and back to KSC's enormous Vehicle Assembly Building, Honeycutt and others said during the briefing. The Artemis 1 team doesn't think that's necessary at this point and instead plans to go ahead with another launch attempt on Saturday.

The team plans to make a few adjustments to the countdown plan — start the engine-cooling process 30 to 45 minutes earlier than last time, for example, And they'll continue analyzing data and mapping out scenarios over the next few days to make sure that the current approach is indeed justified and prudent, Honeycutt said.

"We've got to continue poring over the data," he said. "We've got to put some flight rationale together, anticipating that we're not going to get any better results on that Engine 3 bleed-temp sensor."
Well, I do hope that this approach "is indeed justified and prudent". I guess we'll find out.
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Old 3rd September 2022, 07:57 AM   #83
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Just about ready to scrub the launch. My understanding is leak is with 8 inch hydrogen pipe seal. May have to take Artemis back to the VAB.
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Old 3rd September 2022, 08:20 AM   #84
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Officially scrubbed for today. Waiting on presser.
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Old 3rd September 2022, 08:56 AM   #85
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Old 3rd September 2022, 10:25 AM   #86
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Gotta have patience in aerospace. The mission will happen. Let’s make sure the cryogenics are going where they’re supposed to go, and not going where they’re not supposed to go.
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Old 3rd September 2022, 01:48 PM   #87
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Some people in Titusville are happy when a launch is postponed. We paid $40 to park there today!*

The crowds were obviously not as large as expected since the scrub was called fairly early. I didn't mind paying to park since my wife can't walk very far and the lot was close to a park. Of course, I would like to have seen the launch, but waiting at the park was fun. We saw a nice sunrise behind the SLS. A band played in the morning. Someone let us look at the rocket through a large telescope. We saw a TV news crew doing a report and one of the YouTube channels doing their show. A pair of dolphins frolicked in the water just in front of us.

*A bank let a local charity manage parking in their lot. The money collected supports the charity. We were told that they would have raised $2000 today if the lot had filled. It was more than half-filled by the time the launch was scrubbed.
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Old 3rd September 2022, 01:53 PM   #88
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Old 3rd September 2022, 02:43 PM   #89
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Is there any particular name for the hangar where SpaceX assembles vehicles destined for pad 39A?
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Old 3rd September 2022, 03:21 PM   #90
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I think it's just called the vehicle assembly building.
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Old 3rd September 2022, 04:00 PM   #91
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Artemis I's next launch attempt may not happen until later this year

Quote:
Future launch periods, including those in September and October, depend on what the team decides early next week, but this results in a minimum of delays consisting of at least several weeks.

"We will not be launching in this launch period," said Jim Free, associate administrator for NASA's Exploration Systems Development Mission Directorate. "We are not where we wanted to be."

Free said the stack, including the Space Launch System rocket and Orion spacecraft, has to roll back into the Vehicle Assembly Building, unless they get a waiver from the range, which is run by the US Space Force
Better late than never - a failed launch would be a huge setback.
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Old 3rd September 2022, 04:15 PM   #92
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Originally Posted by Puppycow View Post
I think it's just called the vehicle assembly building.
That is where they assembled Artemis and the original Saturns.

SpaceX has the "SpaceX Horizontal Assembly Facility" south of Pad-39A.
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Old 3rd September 2022, 04:34 PM   #93
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Originally Posted by Puppycow View Post
I think it's just called the vehicle assembly building.
No, that's where SLS is and SpaceX has a launch in about a month so that would be a real mess. SpaceX is already blocking one Artemis launch window.


Originally Posted by slyjoe View Post
That is where they assembled Artemis and the original Saturns.

SpaceX has the "SpaceX Horizontal Assembly Facility" south of Pad-39A.
Yep. That's it. Thanks.
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Old 3rd September 2022, 04:46 PM   #94
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Originally Posted by crescent View Post
Artemis I's next launch attempt may not happen until later this year

Better late than never - a failed launch would be a huge setback.
Yep. I heard the next possible date is September 19.
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Old 3rd September 2022, 05:57 PM   #95
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Originally Posted by crescent View Post
Artemis I's next launch attempt may not happen until later this year.
OK. I can understand ruling out last January due to the temperature but why not last August?
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Old 3rd September 2022, 07:57 PM   #96
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I'll just say what everyone who is thinking: the rocket is fine, but we will need it to blow up an asteroid heading for earth later this year, hence the whole "malfunction" theater.
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Old 4th September 2022, 05:49 AM   #97
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Originally Posted by slyjoe View Post
That is where they assembled Artemis and the original Saturns.

SpaceX has the "SpaceX Horizontal Assembly Facility" south of Pad-39A.
Originally Posted by RecoveringYuppy View Post
No, that's where SLS is and SpaceX has a launch in about a month so that would be a real mess. SpaceX is already blocking one Artemis launch window.



Yep. That's it. Thanks.
Sorry, I misunderstood the question. I assumed that's what you were asking about. The building where they assembled the SLS.
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Old 4th September 2022, 08:18 PM   #98
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I've actually been in the Vehicle Assembly Building. Not a lot of non-NASA employees can say that.
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Old 4th September 2022, 08:28 PM   #99
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Originally Posted by arthwollipot View Post
I've actually been in the Vehicle Assembly Building. Not a lot of non-NASA employees can say that.
A quick look inside the VAB was a part of the KSC Visitor Center tour back when I first visited KSC in the 1970s. When the Shuttle program started to store Solid Rocket Boosters in the VAB it was removed from the tour.
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Old 20th September 2022, 07:24 PM   #100
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Looks like tomorrow will see a cryo-loading test to assess the repairs on the fuel line seals done last week. They'll also be doing the engine bleed and pressurization tests. Better to do all this now and reduce the chance of more surprises on the next actual launch attempt.
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Old 20th September 2022, 10:14 PM   #101
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Northrop Grumman also planned to use the VAB and rest of the Launch Complex 39 infrastructure with its Omega rocket (including the Mobile Launcher, Crawler, and Pad 39B), but canceled the program after not winning a launch services competition. That leaves SLS as the sole user, as it was with Shuttle and Saturn before that. As was pointed out, SpaceX stacks their Falcon horizontally at Pad 39A and raises it up in the manner familiar from Soyuz launches.

I’ve been in the VAB a number of times for work, or more accurately to play glorified tourist while at KSC/CCAFS for work in other facilities. It’s really almost indescribably huge. Attached is a picture I took of one of the Orbiters waiting to be stacked. It was the middle of the night and I was just wandering around snooping in places for which I had numbers on my badge and nobody was bothering to kick me out, even though I had no particular business there at the moment. (The historic abandoned pads on the Cape side were especially good for this.) On a subsequent midnight visit I watched it dangling from the crane while the lift crew waited for the DC-9 sized pendulum’s swaying to damp out.

A few years ago, while supporting work in the LCC, I had a more somber visit to the VAB. The Columbia Recovery Room is now located there, and workers are brought there to inspect the remains of the Orbiter, contemplate the energies involved, and receive a forceful reminder of what is at stake working human space flight programs.
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File Type: jpg BBE6FF24-C5E2-4D69-B0D7-AB2728CE59E9.jpg (95.2 KB, 18 views)
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Old 21st September 2022, 02:42 PM   #102
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From what I've heard it sounds like today's fueling and pressure tests went well. I imagine there's still some data analysis to do, but I'm getting a positive impression from the press statements.
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Old 23rd September 2022, 12:43 PM   #103
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I guess NASA confirmed today that the cryo-loading went very well and they would be all set to try a launch again next week, except now there's a hurricane approaching, so they're probably going to have to take Artemis back to the assembly building. That's such a shame, considering they were so successful at fixing the leaks with the rocket in place.
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Old 23rd September 2022, 03:16 PM   #104
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Not that well, as I understand it. They still had the leak problem and had to load LH2 at a very slow rate until the valves managed to seal up. And they don't really seem to know why they sealed up.
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Old 23rd September 2022, 08:13 PM   #105
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That seems to be the opposite of the impression I got from today's conference call. They said the leak was below constraints even before it went completely away, and basically said the rocket is fully launchable as early as Tuesday, barring weather conditions.
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Old 24th September 2022, 10:51 AM   #106
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OK. I think I got my impression from Scott Manley.
Tuesday launch is off, as I understand it. Tropical storm.
If they don't get it off soon after it'll be November, when Elon is also planning to launch Starship to orbit.
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Old 24th September 2022, 11:47 AM   #107
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Confirmed by AP:
https://www.cbc.ca/news/science/nasa...elay-1.6594552
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Old 28th September 2022, 08:40 PM   #108
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Looks like Ian is going to hit Canaveral near dead-on, so yeah they're going to be pulling the rocket back inside.
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Old 28th September 2022, 08:42 PM   #109
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Already done I hope?

ETA: Apparently: https://spectrumlocalnews.com/me/mai...the%20building.
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Old 28th September 2022, 08:44 PM   #110
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Since the storm is about 140 miles wide, I would expect so.
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Old 30th October 2022, 03:52 AM   #111
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NASA to Provide Update on Artemis I Moon Mission

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NASA is planning to roll the SLS rocket and Orion spacecraft to Launch Pad 39B at Kennedy Friday, Nov. 4, at 12:01 a.m. ahead of launch.

The agency continues to target launch for Monday, Nov. 14, with liftoff planned during a 69-minute launch window that opens at 12:07 a.m. EST. A launch on Nov. 14 would result in a mission duration of about 25-and-a-half days with a splashdown in the Pacific Ocean Friday, Dec. 9.
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Old 30th October 2022, 05:21 PM   #112
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Thanks. I was just thinking this date must be coming up soon.
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Old 6th November 2022, 02:19 PM   #113
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Originally Posted by Puppycow View Post
I figured this one could use its own thread. Seems pretty cool. I wonder how soon it will happen
Never

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Old 9th November 2022, 10:20 PM   #114
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Another hurricane bearing down on Florida causing another delay:

NASA Prepares Rocket, Spacecraft Ahead of Tropical Storm Nicole, Re-targets Launch

Quote:
NASA is continuing to monitor Tropical Storm Nicole and has decided to re-target a launch for the Artemis I mission for Wednesday, Nov. 16, pending safe conditions for employees to return to work, as well as inspections after the storm has passed. Adjusting the target launch date will allow the workforce to tend to the needs of their families and homes, and provide sufficient logistical time to get back into launch status following the storm.
Apparently they are not rolling the rocket back to the Assembly Building. At least, not yet.
Quote:
Based on expected weather conditions and options to roll back ahead of the storm, the agency determined Sunday evening the safest option for the launch hardware was to keep the Space Launch System (SLS) rocket and Orion spacecraft secured at the pad.

The SLS rocket is designed to withstand 85 mph (74.4 knot) winds at the 60-foot level with structural margin. Current forecasts predict the greatest risks at the pad are high winds that are not expected to exceed the SLS design. The rocket is designed to withstand heavy rains at the launch pad and the spacecraft hatches have been secured to prevent water intrusion.
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Old 10th November 2022, 02:06 PM   #115
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Originally Posted by Puppycow View Post
Another hurricane bearing down on Florida causing another delay:

NASA Prepares Rocket, Spacecraft Ahead of Tropical Storm Nicole, Re-targets Launch



Apparently they are not rolling the rocket back to the Assembly Building. At least, not yet.
I would expect an airtight hatch to be waterproof as a side effect of the design at the very least.
And haven't these guys ever seen Marooned?

https://www.imdb.com/title/tt0064639/?ref_=fn_tt_tt_1
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Old 10th November 2022, 04:12 PM   #116
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Originally Posted by Mike! View Post
And haven't these guys ever seen Marooned?

https://www.imdb.com/title/tt0064639/?ref_=fn_tt_tt_1
I certainly have! In my small college town, where the first run movies arrived months late. Upon leaving the theater, I learned Apollo 13 had had a problem.
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Old 14th November 2022, 11:09 AM   #117
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Originally Posted by Mike! View Post
I would expect an airtight hatch to be waterproof as a side effect of the design at the very least.
Assuming the hatches in question are the crew hatches on the Orion capsule: they're meant to have air on one side and vacuum on the other, not air on one side and water being blasted against the other. Even if the water doesn't get through the hatch, it could get into places it isn't supposed to be and might cause deterioration of materials, interference with sensors, undesired effects as it boils and freezes in vacuum, etc.

And the "spacecraft hatches" may also refer to access hatches elsewhere on the spacecraft, not normally required to be airtight.
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Old 15th November 2022, 03:38 PM   #118
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They're into fuel loading for tonight's launch, and it sounds like the engine bleed was successful this time around, and hydrogen seepage from the filling lines is well within safe and expected levels.

If that bears out through the rest of the fueling, it would seem the primary issues of the previous launch attempts have been overcome.
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Old 15th November 2022, 05:41 PM   #119
Trebuchet
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Little after 10:00 PM for me. Got to see if I can get it through YouTube on the bedroom TV.
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Old 15th November 2022, 05:51 PM   #120
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About 3:30pm for me. I'll just be back at my desk after lunch.

Launch after lunch. Nice.
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