Aerospace Picture of the Day

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jetblast16

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Unread post06 Sep 2022, 00:08



93 billion to land people on the moon. The question is what for?

Original video source: https://www.youtube.com/watch?v=mH8OnYj4x2A
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Unread post06 Sep 2022, 00:33

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Unread post06 Sep 2022, 16:29

The problem is inherent from the get go: Why are we going BACK to the moon?

No good reason, just more PC nonsense. It's turning out like every other far left, liberal policy - and absolute disaster, and a disgrace to NASA's history and the nation.
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Unread post06 Sep 2022, 20:46

"We do not launch until we think it's right." NASA Administrator Bill Nelson

While I respect that from a pragmatic engineering viewpoint, one must wonder if these people are getting paid by the hour! Everything is so long and drawn out with it...do we have a case of: analysis paralysis? Stop "looking at the data" and start making sound systems from the beginning, which would essentially negate the need to "look at the data" when something doesn't perform as expected in the future!
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Unread post06 Sep 2022, 20:51

So here's the thing with "why are we going back to the moon?". If we cannot reliably launch, think safely and consistently, to the moon, which is a few orders of magnitude closer to Earth than Mars and set up even a small semi-permanent presence on our only satellite, how do we expect to do that on Mars?
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Unread post06 Sep 2022, 21:18

Shuttle had recurring problems with its hydrogen system. Yet it could meet the instantaneous launch window to the ISS. NASA hasn't managed launching anything of this size in 11 years. So have some patience.
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Unread post08 Sep 2022, 01:45

Teams Continue to Review Options for Next Attempt, Prepare to Replace Seal

After standing down on the Artemis I launch attempt Saturday, Sept. 3 due to a hydrogen leak, teams have decided to replace the seal on an interface, called the quick disconnect, between the liquid hydrogen fuel feed line on the mobile launcher and the Space Launch System (SLS) rocket while at the launch pad.

Performing the work at the pad requires technicians to set up an enclosure around the work area to protect the hardware from the weather and other environmental conditions, but enables engineers to test the repair under cryogenic, or supercold, conditions. Performing the work at the pad also allows teams to gather as much data as possible to understand the cause of the issue. Teams may return the rocket to the Vehicle Assembly Building (VAB) to perform additional work that does not require use of the cryogenic facilities available only at the pad.

To meet the current requirement by the Eastern Range for the certification on the flight termination system, NASA would need to roll the rocket and spacecraft back to the VAB before the next launch attempt to reset the system’s batteries.

Additionally, teams will also check plate coverings on other umbilical interfaces to ensure there are no leaks present at those locations. With seven main umbilical lines, each line may have multiple connection points.

Source: https://blogs.nasa.gov/artemis/

Beginning to wonder if this seal can withstand the cryotemperatures...
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Unread post09 Sep 2022, 03:27

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Unread post13 Sep 2022, 00:50

NASA Adjusts Dates for Artemis I Cryogenic Demonstration Test and Launch; Progress at Pad Continues

NASA has adjusted the targeted dates for a cryogenic demonstration test and to the next launch opportunities for Artemis I, the first integrated flight test of the Space Launch System rocket and Orion spacecraft beyond the Moon. The agency will conduct the demonstration test no earlier than Wednesday, Sept. 21, and has updated its request for a launch opportunity Sept. 27, with a potential backup opportunity of Oct. 2 under review.

The updated dates represent careful consideration of multiple logistical topics, including the additional value of having more time to prepare for the cryogenic demonstration test, and subsequently more time to prepare for the launch. The dates also allow managers to ensure teams have enough rest and to replenish supplies of cryogenic propellants.

NASA and SpaceX also continue to target no earlier than 12:45 p.m. EDT Monday, Oct. 3, for the launch of the agency’s Crew-5 mission to the International Space Station. Teams are working the upcoming commercial crew launch in parallel to the Artemis I planning and both launch schedules will continue to be assessed over the coming weeks. NASA and SpaceX will review the Artemis I and Crew-5 prelaunch processing milestones to understand any potential impacts. The agency’s Crew-4 return will continue to be planned following a short handover on the space station with Crew-5.

Over the weekend, Artemis I teams completed repair work to the area of a hydrogen leak, reconnecting the ground- and rocket-side plates on the quick disconnect for the liquid hydrogen fuel feed line where two seals were replaced last week. This week, teams will conduct tests at ambient conditions to ensure there is a tight bond between the two plates before testing again during the cryogenic tanking demonstration, and begin preparations for the test. During the demonstration, launch controllers will load supercold liquid oxygen and liquid hydrogen into the core stage and interim cryogenic propulsion stage of the SLS rocket. The demonstration will allow teams to confirm the hydrogen leak has been repaired, evaluate updated propellant loading procedures designed to reduce thermal and pressure-related stress on the system, conduct a kick-start bleed test, and evaluate pre-pressurization procedures.

NASA is continuing to respect the Eastern Range’s process for review of the agency’s request for an extension of the current testing requirement for the flight termination system and is providing additional information and data as needed. In parallel, the agency is continuing preparations for the cryogenic demonstration test and potential launch opportunities, should the request be approved.

Specific times for the potential launch opportunities are as follows:

Sept 27: 70-minute launch window opens at 11:37 a.m. EDT; landing on Nov. 5
Under review – Oct. 2: 109-minute launch window opens at 2:52 p.m.; landing on Nov. 11

Source: https://blogs.nasa.gov/artemis/2022/09/ ... continues/
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Unread post19 Sep 2022, 17:40

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Unread post22 Sep 2022, 00:40

Artemis Cryogenic Demonstration Test Concludes, All Objectives Met

The launch director has confirmed all objectives have been met for the cryogenic demonstration test, and teams are now proceeding with critical safing activities and preparations for draining the rocket’s tanks. After encountering a hydrogen leak early in the loading process, engineers were able to troubleshoot the issue and proceed with the planned activities.

The four main objectives for the demonstration included assessing the repair to address the hydrogen leak identified on the previous launch attempt, loading propellants into the rocket’s tanks using new procedures, conducting the kick-start bleed, and performing a pre-pressurization test. The new cryogenic loading procedures and ground automation were designed to transition temperature and pressures slowly during tanking to reduce the likelihood of leaks that could be caused by rapid changes in temperature or pressure. After encountering the leak early in the operation, teams further reduced loading pressures to troubleshoot the issue and proceed with the demonstration test. The pre-pressurization test enabled engineers to calibrate the settings used for conditioning the engines during the terminal count and validate timelines before launch day to reduce schedule risk during the countdown on launch day.

Teams will evaluate the data from the test, along with weather and other factors, before confirming readiness to proceed into the next launch opportunity. The rocket remains in a safe configuration as teams assess next steps.

Follow along for updates on of the Artemis I mission.

Source: https://blogs.nasa.gov/artemis/2022/09/ ... tives-met/
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Unread post23 Sep 2022, 18:33

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Unread post27 Sep 2022, 12:43

Rollback. SLS/Artemis 1 is grounded until November.

DART slammed into Dimorphos.

Last Delta 4 Heavy launched from Vandenberg SLC-6.
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Unread post28 Sep 2022, 02:02

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Unread post28 Sep 2022, 02:07

YAWN.. I think with all the delays with this "rocket", I am going to temporarily pause the current theme or topic (SLS/ Orion), and start the next theme Early STOVL/ VTOL aircraft including the Harrier

Once NASA (finally) gets the rocket off the ground, I will then quickly resume the current (paused) theme SLS/ Orion
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