SLS - space launch system (3-я попытка)

[napalm]

Ну что ж, молодцы

[che wi]

тест завершен

[Seerndv]

che wi пишет:
тест завершен

 

Фу! Где гринпис ? Как же суслики и сурки?

[Олег Шляпин]

https://www.youtube.com/embed/cnGc-S1PKEA?feature=player_detailpage" frameborder="0" allowfullscreen>

SLS Booster Test Part 3

11 марта 2015 г.

[Дмитрий В.]

Seerndv пишет:

che wi пишет:
тест завершен

 

Фу! Где гринпис ? Как же суслики и сурки?

пожертвовали жизнью ради торжества науки и техники.

[Блудный]

Что там за герой на видео бродит в 0:57?

[pkl]

По-моему, птица

[triage]

может уже и писали про желание НАСА получить 6 новых двигателей....

 http://www.bloomberg.com/news/articles/2015-03-10/is-nasa-building-a-huge-rocket-to-nowhere-
The RS-25 engines on the SLS, in contrast, can be used only once. NASA has 16 engines and plans to acquire an additional six.

[N.A.]

An Interview with Boeing's Outgoing SLS Program Manager by Dan Leone
March 24, 2015

NASA SLS booster. Credit: NASA Marshall Space Flight Center

Which parts of the SLS rockets for the 2018 and 2021 flights have been completed so far?
We have all of the rings for the 2018 Exploration Mission-1 completed. A ring is what joins the domes and barrels, which make up the tanks.

What about the domes and the barrels?
All of that is in work. We don't have the flight barrels yet. Of course we do confidence and acceptance welds and we make qualification articles before we do the flight articles. If you were down there today, you would see a force of barrels. Some of them are waiting on the Vertical Assembly Center to complete acceptance testing. Everything at Michoud goes through that tool.

And what's the status of the Vertical Assembly Center?
We are still in the process of checking out the tool. We expect it will be fully functional around the midsummer time frame, which is later than we had hoped. It should have completed certification in the first quarter but we're moving that to the second quarter.

What's the problem?
We have run into an issue with alignment of the tool, and we're working to sort out our options for recovery. The rails that guide the material lift ring were slightly misaligned and wouldn't allow complete translation over the entire height of the Vertical Assembly Center.

Спойлер

In other words, the ring cannot lift the different parts of SLS's stages as high as it needs to. What caused that?
That's part of what we're studying right now. There are a lot of things that could cause the alignment to be wrong: if the tool was not built properly, or if it was not checked out properly, or if the foundation under the Vertical Assembly Center shifted. We have been clipping along and have actually had very few issues. This is one we're working through right now and I have every confidence we'll work through it.

How could the foundation be a problem?
The foundation that was already there at Michoud was too weak to support the tool. We had quite a job to reinforce it, to dig it out and then put it back so it could hold up the Vertical Assembly Center. To give you context for the magnitude of the new foundation, Louisiana is not known for its hard soil, and the new foundation that we laid for the Vertical Assembly Center would hold the largest building in downtown New Orleans, 1 Shell Square.

Does Boeing still believe it will finish the SLS stages in time for the rocket's scheduled maiden launch in 2018?
Yes. Our confirmation review last summer said SLS would launch no later than November of 2018 and we are confident that we will make that.

In its 2016 budget request, the White House again requested less funding for SLS than Congress appropriated the year before. Do you think Congress will plus that up again?
I think funding in 2016 should land closer to where we are today. The White House request was not a surprise, so I expect we'll be having the same efforts this year to fuel an informed decision as we did last year. Congress really feels ownership of this mission and they support what we're doing so greatly.

Has Boeing's SLS work been affected by the Orbital ATK merger?
We haven't seen any affect.

If NASA is serious about operating this rocket once a year starting in the 2020s, shouldn't it put Boeing and the other manufacturers under longer-term manufacturing contracts soon?
We would really like to engage in that dialogue of having a contract for one a year right after Exploration Mission-2, but there hasn't been any real engagement on the topic. We all firmly believe there's not a business case that you would make the investment in this rocket to do two and done. We all believe, all of the contractors believe, and I believe NASA firmly believes, that we will have a launch cadence at some regular interval after Exploration Mission-2. And you are right: Now is the time to begin looking at that.

Next year's presidential election foreshadows at least some political and budgetary turbulence for NASA. How do you think SLS will fare after the Obama administration turns over power in 2017?
The thing that I continue to hold in my head is that we have a real rocket. There are a lot of people talking about human spaceflight today, and I'm really glad that it's back in the discussion. But we actually have flight hardware. This rocket is very real. When you look at history and you see the fate of some programs in the space business, it's a lot easier to impact a program that isn't performing well. We're performing well.

Do you think it would be appropriate for NASA to contract out SLS operations the way it contracted out shuttle operations to United Space Alliance?
I'm a little biased. I had a great experience with United Space Alliance and I thought that was a really good model that worked well for NASA as well as for the missions. And I tell you, I'm really proud to have been able to retire NASA's last heavy-lift launch vehicle with dignity, and now to be developing their next one. It gives me goosebumps when I think about it.

[свернуть]

[che wi]

NASA, Orbital ATK Tackle Tough Booster Issues before Successful Ground Test
http://www.nasa.gov/exploration/systems/sls/nasa-orbital-atk-tackle-tough-booster-issues-before-successful-ground-test.html

[N.A.]

Fix in the Works for Giant SLS Welding Machine
by Dan Leone — April 24, 2015

Because of a misscommunication between two subcontractors to ESAB Welding & Cutting, which built the Vertical Assembly Center, the machine's baseplate wound up crooked, throwing the whole tool 0.06 degrees out of alignment, NASA SLS program manager Todd May said. Credit: NASA


COLORADO SPRINGS, Colo. — The gigantic welding tool that will piece together the stages of NASA's Space Launch System rocket has been taken apart and will be put back together around August to correct a misalignment that made it impossible to use the machine, a NASA official said.

Спойлер

Sweden's ESAB Welding & Cutting, which has its North American headquarters in Florence, South Carolina, built the roughly 65-meter tall Vertical Assembly Center (VAC) as a subcontractor to SLS contractor Boeing at NASA's Michoud Assembly Facility in New Orleans.

ESAB wrapped up construction in September, but discovered the finished tool was out of alignment and therefore unable to lift parts of the 8.4-meter-diameter SLS stages all the way up and down its length for welding.

The problem was due to a "miscommunication" between two ESAB suncontractors, Todd May, NASA's SLS program manager, said here after an April 15 panel discussion at the National Space Symposium.

"The requirement, which was to be horizontal within one eighth of an inch [0.3175 centimeters] measured 170 feet up was not passed to one subcontractor, and instead that subcontractor used the standard tolerance requirements for plate flatness to horizontal within 0.06 inches at the base of the tower," May wrote in a subsequent email to SpaceNews April 20. "This corresponded to a roughly 2.5-inch [6.35 centimeter] misalignment at the top, compared with the intent to have to towers horizontal to within one eighth of an inch [0.3175 centimeters]."

In other words, the VAC's baseplate, which secures the tool to Michoud's concrete floor, was cocked too far to one side. The angle was very slight — the highest part of the baseplate was less than half a centimeter above its lowest part — but it was enough to put the whole tool out of alignment, May said.

While the baseplate's alignment can be corrected easily enough, the plate sits at the very bottom of the VAC and cannot be accessed without disassembling substantial parts of the machine, said May.

[свернуть]

[che wi]

Kennedy Tests Ground Support Component for NASA's Space Launch System
http://www.nasa.gov/feature/kennedy-tests-ground-support-component-for-nasas-space-launch-system

[che wi]

SLS собираются переименовать (по результатам конкурса среди школьников на лучшее название)
http://spaceflightnow.com/2015/05/03/new-name-for-space-launch-system-gets-backing-of-lawmakers/

[che wi]

SLS Booster Work Continues Well after Smoke Clears from Major Test
http://www.nasa.gov/exploration/systems/sls/multimedia/sls-booster-work-continues-well-after-smoke-clears-from-major-test.html

Orbital ATK technicians detach the center forward segment from the forward segment of NASA's five-segment booster that fired up for testing March 11 at Orbital ATK's test facility in Promontory, Utah. The two-minute static test was the first of two ground tests to support qualification of the boosters that will help launch the first flight of NASA's new rocket--the Space Launch System (SLS). The most powerful launch vehicle ever built, SLS will take humans and cargo on deep space missions, including an asteroid and ultimately to Mars. Disassembly and inspection of the booster is ongoing, but preliminary analysis of the test data shows all test objectives were successfully completed during the hot fire. The second qualification test is planned for early 2016. Once qualified, flight booster hardware will undergo final manufacturing and preparation for shipment to NASA's Kennedy Space Center in Florida for the rocket's first unmanned flight.

[che wi]

James Dean ‏@flatoday_jdean  2m ago

Bolden says NASA just completed 2nd successful test-firing of RS-25 engine -- former shuttle engine that will power SLS rocket's core stage.

[Leonar]

Арес-1 
а как они им хотели управлять по крену и тангажу?
у ТТУ сопло отклоняемое было есть?

[Leonar]

спасибо, разобрался

[triage]

 http://lenta.ru/news/2015/07/20/rs25/
19:15, 20 июля 2015
НАСА провело испытания двигателя RS-25, который агентство собирается установить на cамую мощную в мире сверхтяжелую ракету-носитель SLS (Space Launch System). В ходе тестирования агрегаты продемонстрировали работу со 109 процентами номинальной мощности. Об этом сообщается на сайте НАСА.
Работа двигателя RS-25 мощностью выше 106 процентов от расчетной, согласно имеющейся номенклатуре, отвечает эксплуатации силовых установок в аварийных ситуациях. Проведя испытания агрегата для SLS в нескольких режимах (в том числе и в аварийном), инженеры убедились в его работоспособности во всех диапазонах тяги......

сообщение на сайте НАСА (про аварийное и 106% в сообщение НАСА нету)

http://www.nasa.gov/exploration/systems/sls/multimedia/pedal-to-the-metal-rs-25-engine-revs-up-again.html
In auto racing parlance, NASA engineers put the "pedal to the metal" during a July 17 test of its Space Launch System (SLS) RS-25 rocket engine at Stennis Space Center. During a 535-second test, operators ran the RS-25 through a series of power levels, including a period of firing at 109 percent of the engine's rated power....

[triage]

видео этого испытания двигателя (очень громко)
 

[Геннадий Ермолицкий]

Просмотрел тему.Спасибо участникам за информацию. Интересно, что у американцев получится через 50 лет. Ясно, что у них затруднения в создании РН класса "Сатурн-5", вызванные отсутствием приличных маршевых двигателей. У нас двигатели есть, но нет баков и все деньги украли. Прикинул, что можно было сделать на их баке и с их деньгами, но с нашими двигателями, то есть этакий, американо-российский SLS.

Технические решения :
- классический тандем ( керосин на 1-й, водород на 2-й) и никаких ускорителей;
- 4 РД-170 на 1-й ступени, подвешиваемые вокруг центрального бака с кислородом диаметром 8м по компоновке "Протона";
 - 2-3 РД-0120 на 2-й ступени диаметром 8м.

Примерные ТТХ;
стартовая тяга - 3000тс;
стартовая масса - 2400т;
масса ПН на НОО - 108т;
длина 1-й ступени - 21м;
длина 2-й ступени -33м;
диаметр керосиновых баков - 4м;
длина керос.баков -12м ( без хвостового отсека и головного обтекателя);
общий диаметр 1-й ступени -16м ( 8 + 2х4).

По-моему, не плохо по характеристикам и внешнему виду. Жаль, не умею картинки рисовать.