SLS - space launch system (3-я попытка)

[Salo]

http://spacenews.com/amid-mixed-budget-signals-nasa-presses-ahead-with-exploration-upper-stage/

Amid mixed budget signals, NASA presses ahead with Exploration Upper Stage
by Jeff Foust — February 16, 2016
 
Artist's concept of a four-engine Exploration Upper Stage for NASA's Space Launch System. Credit: Boeing  
 
Despite conflicting budget language, NASA is pressing ahead with plans to use a more powerful upper stage on the second flight of the Space Launch System.
Agency managers have reportedly placed a "stop work" order on efforts to human-rate the Interim Cryogenic Propulsion Stage (ICPS), a stage derived from the Delta 4 that will be used on the first, uncrewed launch of SLS in 2018.
Congress, in the final 2016 omnibus spending bill, directed NASA to accelerate work on the larger Exploration Upper Stage and not spend any money to human-rate the ICPS for the second SLS mission, which will carry a crew.
NASA's 2017 budget request, however, assumes a level of funding  insufficient for actually using the Exploration Upper Stage on that second SLS launch. [NASASpaceFlight.com]

[frigate]

"Догоним и пергоним" - ЦиХ вполне мог бы "скроить" аналог на базе 4ХРД-0146Д или 2хРД-0150 под РН СТК первого этапа с ПН на НОО 80 тонн.  

[silentpom]

и потом попытаться объяснить, зачем он это сделал

[Seerndv]

А жаль что они отказались от "хита всех супертяжей"

 

http://arstechnica.com/science/2013/04/new-f-1b-rocket-engine-upgrades-apollo-era-deisgn-with-1-8m-lbs-of-thrust/

Какая симпатяшка!

[Salo]

http://spacenews.com/sls-upper-stage-caught-in-political-tug-of-war/

SLS upper stage caught in political tug-of-war
by Jeff Foust — February 19, 2016
 
The Interim Cryogenic Propulsion Stage, seen here attached to an Orion spacecraft, will fly on the first SLS mission, but future uses remain uncertain. Credit: NASA  
 
WASHINGTON — NASA is stopping work, at the request of Congress, on human-rating the initial upper stage for the Space Launch System, even as the agency argues that its funding projections require it to use that upper stage on crewed missions.
At issue is the future use of the Interim Cryogenic Propulsion Stage (ICPS), an upper stage derived from the Delta 4's upper stage. The ICPS is intended for use on at least the first SLS launch, which will not carry a crew.
NASA confirmed Feb. 18 that it has instructed teams to stop work on efforts to human-rate the ICPS for later, crewed SLS missions, following instructions from Congress in the report accompanying the 2016 omnibus spending bill. News of the stop-work order was first reported by NASASpaceFlight.com
"Based on the direction in the FY 2016 appropriations bill, NASA has directed the exploration systems programs to stop work on engineering activities related to human rating ICPS," NASA spokeswoman Kathryn Hambleton said. She added those programs have been instructed to archive their work, and to defer any decision on using the ICPS on the first crewed SLS mission until later this year.
NASA plans to eventually replace the ICPS with the Exploration Upper Stage, a more powerful upper stage that will be human-rated from the outset. However, Congress and the administration can't agree on when the EUS should be ready.
Report language accompanying the fiscal year 2016 omnibus spending bill passed in December directed NASA to spend at least $85 million of the $2 billion appropriated for SLS for an "enhanced upper stage," a reference to the EUS, that would be ready by Exploration Mission 2 (EM-2), the second SLS launch. The report also directed NASA not to spend any money human-rating the ICPS for EM-2.
However, NASA requested only $1.3 billion for SLS in its 2017 budget request released Feb. 9. That lower funding level, agency officials said, would not support using the EUS on EM-2, which could launch as soon as 2021 but possibly not until 2023.
"To protect that launch date at our request level, we are assuming an ICPS upper stage for EM-2," David Radzanowski, NASA's chief financial officer, said in a conference call with reporters to discuss NASA's budget proposal Feb. 9.
He added that NASA would continue work as directed by Congress on the EUS this fiscal year, including holding a preliminary design review. "We do, as an agency, want to execute Exploration Upper Stage. We need it for future Mars missions down the road," he said. "However, at our funding request level, and to maintain the EM-2 launch schedule as proposed in our request, we are assuming an ICPS for EM-2."
The potential uses, and risks, of flying the ICPS on crewed SLS missions caught the attention of the NASA's Aerospace Safety Advisory Panel (ASAP), the agency's independent safety review board, in its annual report issues Jan. 13. "Since the ICPS was not designed as a human-rated stage, it is not clear to the Panel whether NASA will require modifications to the ICPS for use on a crewed mission or accept the risk of flying 'as is,'" ASAP noted in its report.
Of particular concern, it said, is the lack of shielding to protect it from micrometeoroids and orbital debris. On a typical mission, the upper stage is jettisoned only a few hours after launch, limiting its exposure to any debris impacts that could jeopardize the mission.
However, for EM-2, ASAP recommended the Orion spacecraft remain in Earth orbit for an extended period to test its life support systems before heading into cislunar space. Extending that time in Earth orbit, and thus the time the upper stage must remain attached, increases the risk of the ICPS suffering damage. One solution, ASAP concluded, would be to add shielding to the upper stage.
An alternative included in the report would be to replace the ICPS with the EUS, as Congress is pressuring NASA to do, since it will be designed from the beginning for human missions. "Using the EUS for EM-2 is one potential solution, but NASA does not currently have the funding to make that commitment," ASAP stated in its report.

[Jeff Gorh]

Да, у Dynetics упали темпы сильно. Бюджет...

[Rudel]

Не знаю где спросить, спрошу тут. Вот на видео делают композитный криогенный бак, вроде как в перспективе для sls. На 1:09 на баке возникают две опоры. А за что эти опоры крепятся? Шпангоутов вроде никаких не видно.

[Сергей]

Rudel пишет:
Не знаю где спросить, спрошу тут. Вот на видео делают композитный криогенный бак, вроде как в перспективе для sls. На 1:09 на баке возникают две опоры. А за что эти опоры крепятся? Шпангоутов вроде никаких не видно.
 

Переходные отсеки слева и справа крепятся к кокону клеевым способом через тонкий выравнивающий повышенной эластичности слой. Неясно только полимеризация клея и выравнивающего слоя происходит при нормальной или повышенной температуре( при повышенной прочность повыше).

[Salo]

Варят баки потихоньку. Много фото:
https://www.flickr.com/photos/nasamarshall/sets/72157647648792995

[АниКей]

НАСА начинает первую фазу постройки космодрома для полета на Марс
11:3830.03.201623211
Инженеры НАСА на мысе Канаверал начали первую фазу постройки нового космодрома, с которого ракета SLS и космический корабль Orion отправятся в путешествие к Марсу в 2030 годах.

© Фото: NASA/Marshall Space Flight Center
МОСКВА, 30 мар – РИА Новости. НАСА заявляет о начале первой фазы строительства будущей стартовой площадки для запуска ракетоносителей SLS и космических кораблей Orion, которые через 20-30 лет доставят первых марсонавтов на орбиту красной планеты, сообщает пресс-служба космического агентства.
"Мы работаем не покладая рук и за минувшее время мы уже успели заметным образом изменить то, как выглядит космопорт. Готовясь к путешествию на Марс, наши коллеги в Центре космических полетов имени Кеннеди делают все возможное для того, чтобы быть готовыми к первому пробному запуску SLS и Orion в 2018 году", — заявил Майк Болгер, руководитель программы по развитию наземных систем в НАСА.
В конце прошлого года НАСА раскрыло новые планы по высадке человека на Марс, в соответствии с которыми первые марсонавты будут высажены на поверхность красной планеты в середине 2030 годов. Ключевые элементы этой программы – сверхтяжелый ракетоноситель SLS, разработка которого должна завершиться в 2018 году, и космический корабль Orion.
Обе этих детали "марсианского паззла" являются возрожденными частями отмененной при Бараке Обаме программы Constellation – ракет из семейства Ares и космического корабл CEV, которые должны были доставить астронавтов к Луне уже в 2018 году, а к Марсу —  в 2020-2030 годах.
Запуск SLS с "Орионом" на борту потребует принципиально новой пусковой площадки, способной вместить в себя эту сверхтяжелую ракету, и систем подготовки к полету, совместимых с новым космическим кораблем НАСА. Планы по постройке подобной платформы и модернизации существующих систем в Центре космических полетов имени Кеннеди разрабатывались весь прошлый год, и лишь недавно они были одобрены на всех уровнях руководства в НАСА.
Сейчас, как передает пресс-служба агентства, инженеры и специалисты Центра начинают первые шаги по модернизации пусковой площадки №39 на мысе Канаверал для отправки SLS в космос. Как надеются в НАСА, системы заправки, транспортировки и прочие компоненты пусковых систем будут готовы к первому запуску SLS и "Ориона" в 2018 году.
Сборка самого прототипа космического корабля уже началась в Центре Кеннеди – первые детали "Ориона" были доставлены во Флориду еще в феврале этого года. Часть систем, в том числе сервисный модуль корабля, будет создана европейскими партнерами НАСА.

РИА Новости http://ria.ru/science/20160330/1399772485.html#ixzz44NJ7gZhI

[Salo]

http://www.nasa.gov/exploration/systems/sls/multimedia/second-booster-qualification-ground-test

April 18, 2016
 Welding Wonder Completes Hardware for First Flight of NASA's SLS Rocket
 
 
  Back to Gallery
 Flight hardware for the core stage of the world's most powerful rocket, NASA's Space Launch System, finishes final welding and is moved off the 170-foot-tall Vertical Assembly Center at the agency's Michoud Assembly Facility in New Orleans. The hardware is for the engine section, and is the first major SLS flight component to finish full welding on the Vertical Assembly Center. The engine section is located at the bottom of the rocket's core stage and will house the four RS-25 engines for the first flight of SLS with NASA's Orion spacecraft in 2018. The SLS core stage will stand at more than 200 feet tall and store cryogenic liquid hydrogen and liquid oxygen that will feed the launch vehicle's RS-25 engines. A qualification version of the engine section, which also has completed welding on the Vertical Assembly Center at Michoud, will be shipped later this year to NASA's Marshall Space Flight Center in Huntsville, Alabama, to undergo structural loads testing on a 50-foot test structure currently under construction. All welding for the core stage of the SLS Block I configuration -- including confidence, qualification and flight hardware -- will be completed this summer. Traveling to deep space requires a large vehicle that can carry huge payloads, and SLS will have the payload capacity needed to carry crew and cargo for those exploration missions, including Mars. 
 
Last Upd ated: April 18, 2016
Editor: Jennifer Harbaugh

April 22, 2016
 Booster Segment Answers 'Casting' Call for First Flight of SLS
 
 
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 The first of 10 flight segments for the two solid-rocket boosters of NASA's Space Launch System has been cast at Orbital ATK's facility in Promontory, Utah.  Casting involves filling the insulated metal case with propellant and allowing it to solidify or "cure" for several days. The hardware, which is the aft segment, will eventually be integrated with four other segments to make up one of the two, five-segment solid rocket boosters for the first flight of SLS in 2018. During this flight, called Exploration Mission-1, SLS will carry an unmanned Orion spacecraft to travel thousands of miles beyond the moon over the course of about a three-week mission and help NASA prepare for missions to deep space, including Mars. Orbital ATK is the prime contractor for the boosters.
 
Last Updated: April 22, 2016
Editor: Jennifer Harbaugh

April 29, 2016
 Date Se t for Second SLS Booster Qualification Ground Test
 
 
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A full-scale, test version of the booster for NASA's new rocket, the Space Launch System, will fire up for the second of two qualification ground tests June 28 at prime contractor Orbital ATK's test facility in Promontory, Utah. The test will provide NASA with critical data to support booster qualification for flight. The first, full-scale booster qualification ground test was successfully completed in March 2015, which demonstrated acceptable performance of the booster design at high-temperature conditions. The second test will measure the booster's performance at a cold motor conditioning target of 40 degrees Fahrenheit – which is the colder end of its accepted propellant temperature range. Testing at the thermal extremes experienced by the booster on the launch pad is important to understand the effect of the temperature range on the ballistic performance of the propellant. When completed, two five-segment boosters and four RS-25 main engines will power the world's most powerful rocket, with the Orion spacecraft atop, to achieve human exploration to deep-space destinations, including our journey to Mars.
Image Credit: Orbital ATK
 
Last Updated: April 29, 2016
Editor: Jennifer Harbaugh

[Salo]

Jeff Foust ‏@jeff_foust  8 ч.8 часов назад  
 
And that date is June 28.
 

Jeff Foust добавил
   
  Orbital ATK  @OrbitalATK  
NASA has set a date for the second of 2 full-scale qualification ground tests for our //#[B]SLS[/B] booster: http://ow.ly/4neXP1 //#[B]SLSFiredUp[/B]

[Seerndv]

- а NASA оплачивает  OrbitalATK  все эти испытания?
И да, 40 ° F - это всего 4.5 ° С - т.е. нижняя граница эксплуатации по прежнему не доходит даже до точки замерзания воды ( но близка к точке наибольшей плотности)? ( Привет маленьким любителям ТТУ толкающим их на просторы РФ    )

[Валерий Жилинский]

Seerndv пишет:
- а NASA оплачивает OrbitalATK все эти испытания?

Точнее, Конгресс через НАСА. Уже много лет Конгресс выделяет денег большое, чем просит на SLS и Орион НАСА, да и сам проект был инициирован именно Конгрессом, как дополнение к COTS...
   
Вся программа SLS и Орион оплачивается по принципу "затраты плюс", то есть оплачиваются все расходы, а потом на их сумму ещё немножко - это нормированная прибыль. В этом принципиальное отличие этой программы от программы COTS, где после выполнения этапа следовала заранее оговорённая субсидия, но не превышающая половины расходов по выполнению этапа.

[Leonar]

Seerndv пишет:
это всего 4.5 ° С - т.е. нижняя граница эксплуатации по прежнему не доходит даже до точки замерзания воды ( но близка к точке наибольшей плотности)? ( Привет маленьким любителям ТТУ толкающим их на просторы РФ

А связано это с уплотнителями али с изменением состава топлива?

[Leonar]

всмысле структуры и соответственно его теплохимфизических свойств от мороза?

[Seerndv]

Читаем:

The second test will measure the booster's performance at a cold motor conditioning target of 40 degrees Fahrenheit – which is the colder end of its accepted propellant temperature range. Testing at the thermal extremes experienced by the booster on the launch pad is important to understand the effect of the temperature range on the ballistic performance of the propellant.

- переводим:

Второй тест будет измерять производительность ускорителя охлаждённого до 40 градусов по Фаренгейту, что гораздо холодней чем нижняя граница допустимого диапазона температуры топлива. Тестирование на экстремальные температуры, испытываемые ускорителем на стартовой позиции важно для понимания эффектов температурного диапазона на баллистические показатели топлива.

[Salo]

Jeff Foust ‏@jeff_foust  1 ч.1 час назад  
Bolger: agency commitment date for EM-1 is November 2018, but working internally to September 2018 date.
 
  Jeff Foust ‏@jeff_foust  1 ч.1 час назад  
Ground systems manager Mike Bolger discussing upgrades to VAB and LC-39B, including "re-bricking" of the flame trench at the pad.
 
  Jeff Foust ‏@jeff_foust  2 ч.2 часа назад  
Honeycutt: plan to do PDR for Exploration Upper Stage by the end of the year, fly EUS on EM-2. [Administrations budget request disagrees.]
 
  Jeff Foust ‏@jeff_foust  2 ч.2 часа назад  
Honeycutt: I would like to see our rocket [SLS] fly more than once a year.
 
  Jeff Foust ‏@jeff_foust  2 ч.2 часа назад  
Honeycutt: started conditioning the motor for the QM-2 SRB test today. (Will be cooled to ~40˚F for that test.)
 
  Jeff Foust ‏@jeff_foust  2 ч.2 часа назад  
Honeycutt: we did have some issues initially with the Vertical Assembly Center at Michoud, but overcome them now and making good progress.
 
  Jeff Foust ‏@jeff_foust  2 ч.2 часа назад  
SLS manger John Honeycutt: want to separate fact from fiction today. We're moving rapidly to the launch pad.
 
  Jeff Foust ‏@jeff_foust  2 ч.2 часа назад  
Kirasich, on Orion testing: "You know NASA, we're always preparing for the worst-case days."
 
  Jeff Foust ‏@jeff_foust  2 ч.2 часа назад  
Mark Kirasich, Orion manager, shows EM-1 hardware and says it'll be on its way to the Moon 28 months from now (that would be Sept. 2018).
 
  Jeff Foust ‏@jeff_foust  2 ч.2 часа назад  
On Capitol Hill today for a Space Transportation Association panel featuring NASA's managers of SLS, Orion, and ground systems.

[Salo]

https://blogs.nasa.gov/kennedy/2016/05/10/liquid-hydrogen-tanker-flex-hose-fit-check-at-launch-pad-39b/

Liquid Hydrogen Tanker Flex Hose Fit Check at Launch Pad 39B
Posted on May 10, 2016 at 2:05 pm by Linda Herridge.          

Engineers and technicians on the Test and Operations Support Contract go over procedures with liquid hydrogen (LH2) provider PRAXAIR April 28 to prepare for a fit check of the new LH2 transfer flex hose at Launch Pad 39B at NASA's Kennedy Space Center in Florida. LH2 provider PRAXAIR connected the transfer flex hose from its LH2 truck to the LH2 tanker to confirm that the hose fits and functions properly. The Ground Systems Development and Operations Program is overseeing upgrades and modifications to Pad 39B to support processing of the Space Launch System rocket and Orion spacecraft for Exploration Mission 1 and NASA's journey to Mars.
Photo credit: NASA/Frankie Martin

[triage]

http://spacenews.com/house-bill-offers-19-5-billion-for-nasa-in-2017/
House bill offers $19.5 billion for NASA in 2017
 by Jeff Foust — May 17, 2016

WASHINGTON — A House appropriations bill released May 17 would provide NASA with $19.5 billion in 2017, with significant increases in funding for the agency's Orion and Space Launch System programs and a planned mission to Jupiter's moon Europa.

The bill, released by the House Appropriations Committee in advance of a May 18 markup session by its Commerce, Justice and Science (CJS) subcommittee, provides NASA with nearly half a billion dollars more than the agency's request, which included a mix of discretionary and mandatory funds, and nearly $200 million above a bill approved by Senate appropriators last month.

The bill calls for spending $2 billion for the SLS program and $1.35 billion for Orion. Those levels are well above NASA's request of $1.31 billion for SLS and $1.12 billion for Orion, although the Senate's bill provides even more — $2.15 billion — for SLS.
.........