SLS - space launch system (3-я попытка)

Автор Salo, 16.02.2012 10:25:55

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Чебурашка

Вслед за водородным баком, показали и кислородный для второй лётной SLS  https://twitter.com/NASA_SLS/status/1199779938062217217


LRV_75

Над этими баками уже провели безчеловечные эксперименты или они только из производства выкатили?
Главное не наличие проблем, главное способность их решать.
У каждой ошибки есть Имя и Фамилия

Чебурашка

Пишут, что в процессе экспериментов https://www.nasa.gov/exploration/systems/sls/artemis-II-rocket-propellant-tanks-prepped-for-next-phase-of-manufacturing.html

Учитывая, что это уже третий изготовленный полный комплект баков - сюрпризов быть не должно.

tnt22

https://www.nasa.gov/feature/going-with-the-flow-egs-team-tests-flow-of-cryogenic-fluids
ЦитироватьNov. 26, 2019

Going with the Flow: EGS Team Tests Flow of Cryogenic Fluids


A liquid hydrogen storage tank is photographed at Launch Pad 39B on Nov. 8, 2019, at NASA's Kennedy Space Center in Florida. The agency's Exploration Ground Systems oversaw testing of the pad's cryogenic systems – the infrastructure that will support the flow of liquid hydrogen and liquid oxygen from the storage tanks to the Space Launch System (SLS) rocket – in preparation for the launch of SLS with the Orion spacecraft atop for the uncrewed Artemis I mission.
Credits: NASA/Ben Smegelsky

By Danielle Sempsrott
NASA's Kennedy Space Center


With NASA's mobile launcher at Launch Pad 39B for final verification and testing, the agency's Exploration Ground Systems (EGS) team has completed another critical set of tests, bringing the agency even closer to the first integrated launch of the Space Launch System (SLS) rocket and Orionspacecraft for the Artemis I mission. Over the course of two weekends, teams tested the flow of cryogenic fluids through the pad's infrastructure – those systems that will send liquid hydrogen (LH2) and liquid oxygen (LOX) to the rocket at the time of launch.


In this view, the cross-country line that liquid hydrogen will flow through can be seen stretching from the storage tank to the mobile launcher (ML) at Launch Pad 39B on Nov. 8, 2019, at NASA's Kennedy Space Center in Florida.
Credits: NASA/Ben Smegelsky

"This is the first time that we've flown LOX and LH2 through the pad's systems with the mobile launcher at the pad and with all the interfaces connected," said Melissa Batis, NASA operations project engineer and EGS integration lead. "Everything worked perfectly. This test was huge in validating and verifying that the ground systems at the pad function with the mobile launcher as they were designed and will be able to support the SLS rocket."

During launch, LH2 and LOX will flow from storage tanks near the pad – each of which can hold more than 800,000 gallons of propellant – to the mobile launcher's Tail Service Mast Umbilicals. The umbilicals will connect to the SLS core stage, considered the backbone of the rocket, and contain all of the fluid lines for propellant loading. The cryogenic fluids will travel about 1,800 feet from the storage tanks to the umbilicals via piping referred to as cross-country lines.

The LOX and LH2 storage areas include hardware that was developed for the Apollo program and the Space Shuttle Program, as well as brand-new hardware elements, such as the mobile launcher. These tests demonstrated that the newer and older systems could successfully work together to support fueling of the rocket.

"It was important to couple the two together as one unit – one large LOX unit and one large LH2 unit – and validate that we could provide cryogenic propellant to the umbilicals," said Kody Smitherman, a LOX system engineer on the Test Operations and Support Contract. "And that's exactly what we've done. We can say we would've successfully loaded the rocket if it were present at the pad."

While LOX and LH2 share some similarities, such as the storage areas they come from and the lines and systems they'll flow through, they also have major differences. LOX is much heavier than LH2 – around nine-and-a-half pounds per gallon as opposed to half-a-pound per gallon – requiring the need for a pump to create the necessary pressure to push it from the tank to the rocket. The lighter LH2 will make its way up to the pad using gaseous hydrogen to pressurize the tank to begin the flow.

One other difference is how excess LOX and LH2 are handled. Any LOX left over from testing, or any that doesn't end up going into the rocket, flows to a basin and gets reabsorbed into the atmosphere. LH2 is very flammable and would ignite if released. Any excess LH2 travels to a new 60,000-gallon tank and then out to a flare stack to burn it off.

The test verified the disposal methods for excess fluids, checked for leaks, confirmed that the LOX pumps could perform appropriately and validated that piping on the mobile launcher could handle the extremely cold temperatures of LOX and LH2. The next time these systems are used will be about two months before launch for the wet dress rehearsal, during which the SLS rocket rolls out to the pad completely fueled and drained.

"Proving the ground systems work as expected under cryogenic conditions is critical, and completing this test continues our progress toward the Artemis I launch," said Charlie Blackwell-Thompson, EGS launch director.

The first in a series of complex missions, Artemis I will demonstrate the agency's ability to extend human presence to the Moon, paving the way for future missions to Mars. This test was a vital step in validating the infrastructure at Kennedy that will support those launches.

Last Updated: Nov. 27, 2019
Editor: Danielle Sempsrott

tnt22

https://www.nasa.gov/exploration/systems/sls/multimedia/rocket-capabilities-for-deep-space-infographic.html
ЦитироватьDec. 2, 2019

NASA's Space Launch System Rocket Capabilities for Deep Space



Powered by four RS-25 engines and twin solid rocket boosters, NASA's Space Launch System (SLS) rocket produces 8.8 million pounds of thrust to propel the agency's Artemis missions to the Moon. Offering more payload mass, volume capability and energy to speed missions through deep space, the SLS rocket is designed to be both flexible and evolvable to enable a variety of missions, including landing the first woman and the next man on the Moon by 2024. SLS, along with NASA's Gateway in lunar orbit and the Orion spacecraft, is NASA's backbone for NASA's deep space exploration. It is the only rocket that can send Orion, astronauts and supplies beyond Earth's orbit to the Moon on a single mission.

Image Credit: NASA/Bailey Collins

Last Updated: Dec. 2, 2019
Editor: Jennifer Harbaugh

Чебурашка

ЦитироватьEngineers at @NASA_Marshall  are preparing to push a #NASASLS test article identical to the world's largest rocket fuel tank beyond its design limits and find its breaking point. HOW THEY'LL DO IT

Они в натуре собираются его сломать. Их Маск покусал????  :D


Старый

Пусть наддуют его до штатного значения. Ато нечестно получается. :) 
1. Ангара - единственная в мире новая РН которая хуже старой (с) Старый Ламер
2. Назначение Роскосмоса - не летать в космос а выкачивать из бюджета деньги
3. У Маска ракета длиннее и толще чем у Роскосмоса
4. Чем мрачнее реальность тем ярче бред (с) Старый Ламер

tnt22

https://www.nasa.gov/exploration/systems/sls/nasa-will-push-exploration-rocket-test-hardware-beyond-its-limits.html
ЦитироватьDec. 4, 2019

NASA Will Push Exploration Rocket Test Hardware Beyond Its Limits


Engineers are preparing to push a test article identical to the world's largest rocket fuel tank beyond its design limits and find its breaking point during upcoming tests at NASA's Marshall Space Flight Center in Huntsville, Alabama. This will be the largest-ever controlled test-to-failure of a NASA rocket stage fuel tank. Earlier this year, a NASA and Boeing test team subjected a test version of the Space Launch System (SLS) liquid hydrogen tank to a series of 37 tests that simulate liftoff and flight stresses. Inside a 220-foot-tall test stand, they used large hydraulic pistons to push and pull on the test tank with millions of pounds of force. The test article aced these tests and showed no signs of cracks, buckling or breaking and qualified the design for flight. Now, the team will test the tank's limits. The test article's structure is identical to the hydrogen tank that is part of the SLS core stage. This tank will store 537,000 gallons of super cooled liquid hydrogen to help power the four SLS core stage RS-25 engines for the 8-minute climb to orbit at more than 17,000 miles per hour.
Credits: NASA/MSFC
View Image feature

Engineers are preparing to push a test article identical to the world's largest rocket fuel tank beyond its design limits and find its breaking point during upcoming tests at NASA's Marshall Space Flight Center in Huntsville, Alabama.

Earlier this year, a NASA and Boeing test team subjected a test version of the Space Launch System (SLS) liquid hydrogen tank to a series of 37 tests that simulate liftoff and flight stresses by using large hydraulic pistons to push and pull on the test tank with millions of pounds of force.  The test article aced these tests and showed no signs of cracks, buckling or breaking and qualified the design for flight. Now, the team wants to see just how much the tank can take.

"Space exploration involves risk," said Julie Bassler, manager of the Space Launch System Stages Office. ""This is a different kind of exploration that happens before we launch. A test to failure of the largest liquid hydrogen tank ever produced will expand our knowledge to ensure we can safely get the most performance out of the rocket that will send astronauts and large cargo to the Moon and then to Mars."

The hydrogen tank is part of the SLS core stage. Measuring more than 130 feet tall and 27.6 feet in diameter, it stores 537,000 gallons of super cooled liquid hydrogen to help power the four SLS core stage RS-25 engines for the 8-minute climb to orbit at more than 17,000 miles per hour. The test article's structure is identical to that of the flight hardware.

Having certified the tank for both the current version of SLS, called Block 1, as well as the more powerful Block 1B version in development, engineers are preparing their 215-foot-tall test stand for one final test to see exactly how much stress the hydrogen tank can take before it fails structurally.

Built by Boeing at NASA's Michoud Assembly Facility in New Orleans and barged to Marshall last December, the hydrogen tank test article has been fitted with thousands of sensors measuring, stress, pressure, and temperature, while high-speed cameras and microphones capture every inch for the expected telltale buckling or cracking in the cylindrical tank wall.

"The core stage hardware structures are brand new, first-time developments, so this testing is crucial to ensuring mission success," said Luke Denney, qualification test manager for Boeing's Test & Evaluation Group. "The tests were designed to prove that each component of the stage will be able to survive its own unique set of extreme environmental conditions during liftoff, ascent and flight."

In fact, this will be the largest-ever controlled test-to-failure of a NASA rocket stage fuel tank, said Mike Nichols, Marshall's lead test engineer for the tank.

"The failure mechanism of a slender multi-segment rocket stage is not very well understood," he said. "By taking this test article to failure, we can better understand the phenomenon. This test will benefit all rocket engineers, providing valuable data for their propellant tank designs for future rocket stages."

Engineers have computer calculations that predict when and where and how the tanks should fail. But without a carefully planned test they won't know exactly. That difference is important for NASA's plans to return human explorers to the Moon.

"In spaceflight, especially human spaceflight, we always walk the line between performance and safety, said Neil Otte, the chief engineer for the SLS Stages Office.  "Pushing systems to the point of failure gives us additional data to walk that line intelligently.  We will be flying the Space Launch System for decades to come, and we have to take all the opportunities we have to maximize our understanding of the system so we may safely and efficiently evolve it as our desired missions evolve.

This is not the first SLS test article to be tested to structural failure. Test versions of the engine section and intertank were also tested until they broke above 140% of anticipated flight stresses.

While engineers predict the test will not create a sizable hole in the tank, should that happen, areas of the community close to Redstone Arsenal hear a low-level sound as the nitrogen gas used to pressurize the tank is vented.

The 212-foot-tall core stage is the largest, most complex rocket stage NASA has built since the Saturn V stages that powered the Apollo missions to the Moon. SLS and Orion, along with the Gateway in orbit around the Moon, are NASA's backbone for deep space exploration and the Artemis program, which will send the first woman and next man to the lunar surface by 2024. SLS is the only rocket that can send Orion, astronauts, and supplies to the Moon on a single mission.

Last Updated: Dec. 4, 2019
Editor: Jennifer Harbaugh

tnt22

Таки порвали...

https://www.nasa.gov/exploration/systems/sls/nasa-engineers-break-sls-test-tank-on-purpose-to-test-extreme-limits.html
ЦитироватьDec. 7, 2019

NASA Engineers Break SLS Test Tank on Purpose to Test Extreme Limits


The Dec. 5 test pushed the tank to its limits to see how much force it would take to cause the tank's structure to fail. This image shows the resulted buckling of the structure when the tank failed after exposure to more than 260% of expected flight loads over 5 hours.
Credits: NASA/Dennis Olive
Read full caption

Engineers at NASA's Marshall Space Flight Center in Huntsville, Alabama, on Dec. 5 deliberately pushed the world's largest rocket fuel tank beyond its design limits to really understand its breaking point. The test version of the Space Launch System rocket's liquid hydrogen tank withstood more than 260% of expected flight loads over five hours before engineers detected a buckling point, which then ruptured. Engineers concluded the test at approximately 11 p.m.

"We purposely took this tank to its extreme limits and broke it because pushing systems to the point of failure gives us additional data to help us build rockets intelligently," said Neil Otte, chief engineer of the SLS Stages Office at Marshall. "We will be flying the Space Launch System for decades to come, and breaking the propellant tank today will help us safely and efficiently evolve the SLS rocket as our desired missions evolve."

The test version of the tank aced earlier tests, withstanding forces expected at engine thrust levels planned for Artemis lunar missions, showing no signs of cracks, buckling or breaking. The test on Dec. 5 -- conducted using a combination of gaseous nitrogen for pressurization and hydraulics for loads -- pushed the tank to the limits by exposing it to higher forces that caused it to break as engineers predicted. Earlier tests at Marshall certified the tank for both the current version of the SLS -- called Block 1, which will use an upper stage called the Interim Cryogenic Propulsion Stage -- and the Block 1B version that will replace the ICPS with the more powerful Exploration Upper Stage.

"This final tank test marks the largest-ever controlled test-to-failure of a NASA rocket stage pressurized tank," said Mike Nichols, Marshall's lead test engineer for the tank. This data will benefit all aerospace companies designing rocket tanks."

For all the tests, NASA and Boeing engineers simulated liftoff and flight stresses on a test version of the Space Launch System liquid hydrogen tank that is structurally identical to the flight tank. Throughout the tests in Marshall's 215-foot-tall test stand, they used large hydraulic pistons to deliver millions of pounds of punishing compression, tension and bending forces on the robust test tank.

The test tank was fitted with thousands of sensors to measure stress, pressure and temperature, while high-speed cameras and microphones captured every moment to identify buckling or cracking in the cylindrical tank wall.

"The initial tank buckling failure occurred at the same relative location as predicted by the Boeing analysis team and initiated within 3% of the predicted failure load," said Luke Denney, qualification test manager for Boeing's Test & Evaluation Group. "The accuracy of these predictions against real life testing validates our structural models and provides high confidence in the tank design."

Teams at Michoud are wrapping up functional testing of the assembled SLS core stage for the Artemis I mission and already are building the core stage for the Artemis II mission. The 212-foot-tall core stage is the largest, most complex rocket stage NASA has built since the Saturn V stages that powered the Apollo missions to the Moon.

"We are happy that NASA's tests with the core stage structural test article will contribute not only to Space Launch System flights but also to the design of future rocket propellant tanks," said Julie Bassler, manager of the SLS Stages Office.

SLS is the only rocket that can send Orion, astronauts and supplies to the Moon on a single mission. SLS, Orion and the Gateway in orbit around the Moon, are NASA's backbone for deep space exploration and the Artemis program, which will send the first woman and next man to the lunar surface by 2024.

Last Updated: Dec. 7, 2019
Editor: Lee Mohon

triage

#2169
Цитироватьhttps://spacepolicyonline.com/news/loverro-takes-the-helm-at-heomd-bridenstine-pushes-back-on-2-billion-sls-cost-estimate/

LOVERRO TAKES THE HELM AT HEOMD, BRIDENSTINE PUSHES BACK ON $2 BILLION SLS COST ESTIMATE

By Marcia Smith | Posted: December 3, 2019 11:53 pm ET | Last Updated: December 4, 2019 12:29 am ET

Doug Loverro has reported for duty at NASA as the new Associate Administrator for the Human Exploration and Operations Mission Directorate (HEOMD).  He succeeds Bill Gerstenmaier, who was abruptly dismissed from the job by NASA Administrator Jim Bridenstine in July.  Bridenstine introduced Loverro to the NASA workforce in a Town Hall meeting today and the two answered a bevy of questions. One concerned the estimate, put forward by the White House, that each Space Launch System (SLS) launch will cost $2 billion. Bridenstine pushed back, saying he thinks it will be much less.

Bridenstine announced Loverro's selection for the job in October, but he joined the agency just yesterday...

Loverro is taking on a big job. He is in charge of managing NASA's .... All in all, he oversees a portfolio of about $10 billion, roughly half NASA's annual budget....

It was in that context that OMB wrote to Senate appropriators last month urging them to delete language in the FY2020 appropriations bill now working its way through Congress that requires NASA to launch Europa Clipper on SLS.  The OMB letter used "over $2 billion" as the estimated cost of an SLS launch, arguing that is $1.5 billion more than a commercial launch.  The $2 billion figure has been widely cited since then as an  official cost estimate.

Bridenstine was asked about it today, and disagreed. "I do not agree with the $2 billion number. It is far less than that. I would also say the number comes way down when you buy more than one or two. I think in the end we're going to be in the $800-900 million range."  NASA has bought only two SLS launches so far and negotiations are just starting on the third and fourth, he added.

NASA announced in October that it authorized Boeing to begin building the core stage for the third rocket, which will launch the crew that lands on the Moon, while negotiations are underway to buy up to 10 as well as up to eight Exploration Upper Stages. The contract is to be finalized "within the next year."

His enthusiasm for SLS stands in stark contrast to the situation just a few months ago. ...
Цитироватьhttps://spacenews.com/new-nasa-human-spaceflight-leader-calls-sls-mandatory-for-return-to-the-moon/

New NASA human spaceflight leader calls SLS "mandatory" for return to the moon
by Jeff Foust — December 4, 2019

... Bridenstine, though, claimed that cost estimate was too high. "I do not agree with the $2 billion number. It is far less than that," he said at the town hall meeting. "I would also say the number comes way down when you buy more than one or two."

"I think at the end, we're going to be at the $800 million to $900 million range. I don't know, honestly," he said, because NASA had just started negotiations with prime contractor Boeing on a long-term production contract for the SLS.....

Not

Цитироватьtnt22 написал: The test version of the Space Launch System rocket's liquid hydrogen tank withstood more than 260% of expected flight loads over five hours before engineers detected a buckling point, which then ruptured. Engineers concluded the test at approximately 11 p.m.

. . .

The test tank was fitted with thousands of sensors to measure stress, pressure and temperature, while high-speed cameras and microphones captured every moment to identify buckling or cracking in the cylindrical tank wall.

"The initial tank buckling failure occurred at the same relative location as predicted by the Boeing analysis team and initiated within 3% of the predicted failure load," said Luke Denney, qualification test manager for Boeing's Test & Evaluation Group. "The accuracy of these predictions against real life testing validates our structural models and provides high confidence in the tank design."

. . .


Вот где нужно учиться Маскy. 3 процента от модельной оценки разрушающей нагрузки! И никаких воплей по поводу смены дизайна на более прогрессивный после сорванной крыши :D

Чебурашка

#2171
Только один такой стенд стоит больше чем фигляр Маск собирается потратить на весь Звездолёт.. Башляют насароги.

Старый

ЦитироватьNot написал:
Вот где нужно учиться Маскy. 3 процента от модельной оценки разрушающей нагрузки! И никаких воплей по поводу смены дизайна на более прогрессивный после сорванной крыши
Тссс! Дмитрий Олегович услышит - потребует построить такой же. Только в два раза выше и ширше чтоб был не имеющим аналогов в мире. 
И пока не построим - счастья не видать. 
1. Ангара - единственная в мире новая РН которая хуже старой (с) Старый Ламер
2. Назначение Роскосмоса - не летать в космос а выкачивать из бюджета деньги
3. У Маска ракета длиннее и толще чем у Роскосмоса
4. Чем мрачнее реальность тем ярче бред (с) Старый Ламер

Not

ЦитироватьЧебурашка написал:
Только один такой стенд стоит больше чем фигляр Маск собирается потратить на весь Звездолёт.. Башляют насароги.

Стенд стоит копейки. Денег стоят модельеры и их модели.

Старый

ЦитироватьNot написал:
Стенд стоит копейки. 
Да ладно! А котлован? А бетон? А металлоконструкции? Сколько там выделено на СК Ангары? 
1. Ангара - единственная в мире новая РН которая хуже старой (с) Старый Ламер
2. Назначение Роскосмоса - не летать в космос а выкачивать из бюджета деньги
3. У Маска ракета длиннее и толще чем у Роскосмоса
4. Чем мрачнее реальность тем ярче бред (с) Старый Ламер

Not

ЦитироватьСтарый написал:
 
ЦитироватьNot написал:
Стенд стоит копейки.
Да ладно! А котлован? А бетон? А металлоконструкции? Сколько там выделено на СК Ангары?  
Ты лучше расскажи сколько там выделено на блеск и крылышики стар (тьфу) шипа? А каков результат?

Старый

ЦитироватьNot написал:
 Ты лучше расскажи сколько там выделено на блеск и крылышики стар (тьфу) шипа? А каков результат?
За свои деньги - любой каприз! Хоть позолоченные!  8) 
1. Ангара - единственная в мире новая РН которая хуже старой (с) Старый Ламер
2. Назначение Роскосмоса - не летать в космос а выкачивать из бюджета деньги
3. У Маска ракета длиннее и толще чем у Роскосмоса
4. Чем мрачнее реальность тем ярче бред (с) Старый Ламер

Not

ЦитироватьСтарый написал: За свои деньги - любой каприз! Хоть позолоченные!  8)  
Свои деньги через госзаказ? Ничего не попутал? :D

Старый

ЦитироватьNot написал:
 
ЦитироватьСтарый написал: За свои деньги - любой каприз! Хоть позолоченные!    
Свои деньги через госзаказ? Ничего не попутал?
У Маска госзаказ на Страшип??? Ты сам то ничего крепче Мартини не тяпнул?  :evil: 
1. Ангара - единственная в мире новая РН которая хуже старой (с) Старый Ламер
2. Назначение Роскосмоса - не летать в космос а выкачивать из бюджета деньги
3. У Маска ракета длиннее и толще чем у Роскосмоса
4. Чем мрачнее реальность тем ярче бред (с) Старый Ламер

Not

ЦитироватьСтарый написал: У Маска госзаказ на Страшип???
У Маска фирма, прочно сидящая на госзаказе. А куда он там распределяет деньги - дело десятое :D