SLS - space launch system (3-я попытка)

Автор Salo, 16.02.2012 10:25:55

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0 Пользователи и 2 гостей просматривают эту тему.

Чебурашка

Какой шикарный ролик выпустили https://twitter.com/NASA/status/1063523159532609536

Я аж задрожал от нетерпения увидеть их большую и толстую ракету из трёх букв на старте.

Обратите внимание на экипаж - женщина, негр и человек, с азиатским типом внешности и только четвёртый белый мужчина.
Это вам не какие-то расистско-сексистские  Аполлоны  :D

tnt22

https://www.nasa.gov/image-feature/nasa-ushers-in-autumn-with-powerful-rs-25-engine-test-for-sls
ЦитироватьNov. 16, 2018

NASA Ushers in Autumn with Powerful RS-25 Engine Test for SLS



NASA ushered in the Gulf Coast fall season with force Nov. 15, conducting a full-power, full-duration 650-second RS-25 engine test on the A-1 Test Stand at Stennis Space Center near Bay St. Louis, Mississippi, where the agency is testing engines to help power its new Space Launch System (SLS) rocket. Operators fired development engine No. 0525 to a 113 percent thrust level for 60 seconds during the test, marking only the second time they have achieved the highest RS-25 power level. Engineers first fired development engine No. 0528 to that level during a February test at Stennis. Four RS-25 engines will help power SLS at launch, supplying a combined 2 million pounds of thrust and working in conjunction with a pair of solid rocket boosters to provide more than 8 million pounds of thrust. RS-25 engines for initial missions are former space shuttle engines, designed to provide a specific power level, categorized as 100 percent thrust. Through the space shuttle years, the engines were modernized to provide additional thrust up to 109 percent of the original level. For SLS, they have been modified again to provide up to 111 percent of original thrust, with the 113 percent hot fires at Stennis allowing operators to test a margin of safety. The test also marked the third time an RS-25 engine has been fired for the longer duration. Typical tests run 500 seconds, the amount of time (8 minutes, 20 seconds) the engine must fire to power the rocket fr om launch into space. The 650-second duration represents the time three RS-25 engines would have to fire to burn up propellant and power the rocket into orbit, if the fourth shut down early during an SLS launch. The longer time also allows operators to schedule and meet more performance objectives during a test. This hot fire was also the sixth on this engine in a current series of acceptance tests for RS-25 engine controllers that will be used on future SLS flights. The new controller is a key component of recent engine modifications. It operates as the brain of the engine, helping it to communicate with the rocket and controlling engine operation and internal health diagnostics. The hot fire also featured continued testing of two innovative engine components – a 3D-printed pogo accumulator to dampen pressure oscillations that can cause flight instability and a main combustion chamber fabricated using a new hot isostatic pressing (HIP) bonding technique that saves considerable time and money. RS-25 tests continue NASA's progress toward Exploration Mission-1, wh ere the new rocket will send an Orion spacecraft around the Moon and back to test critical capabilities needed to carry astronauts farther in space than ever before, and eventually to Mars. On Exploration Mission-2, SLS will carry astronauts aboard Orion on a return to deep space. Prior to those flights, NASA will test the SLS core stage on the B-2 Test Stand at Stennis. RS-25 tests at Stennis are conducted by a combined team of NASA, Aerojet Rocketdyne and Syncom Space Services operators. Aerojet Rocketdyne is the RS-25 prime contractor. Syncom Space Services is the prime contractor for Stennis facilities and operations.

Last Updated: Nov. 16, 2018
Editor: Deborah Fendley

tnt22

ЦитироватьHow Do You Assemble the Largest Rocket Ever Made?

NASA

Опубликовано: 1 дек. 2018 г.

At the Vehicle Assembly Building at Kennedy Space Center, technicians practice and prepare to stack NASA's Space Launch System rocket. The SLS fueled-up core stage weighs around 2.3 million pounds and measures 212 feet long.
https://www.youtube.com/watch?v=ulr36BypZTUhttps://www.youtube.com/watch?v=ulr36BypZTU (2:17)

tnt22

Очередное огневое испытание

https://www.nasa.gov/multimedia/nasatv/schedule.html
ЦитироватьNASA Television Upcoming Events
Watch NASA TV

All times Eastern

December 12, Wednesday

(No earlier than) 3 p.m. – RS-25 Engine Test (All Channels)

tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 13:26 - 12 дек. 2018 г.

ABORT! Serious problem during the latest RS-25 test! Fire on the powerhead!




13:27 - 12 дек. 2018 г.

Happened about 10 seconds in. Fire was seen, large vibration. Abort called and safing is in progress.




13:29 - 12 дек. 2018 г.

Test stand looks safe. Thankfully the engine didn't let go or that would have been a boom.

Damn! Well that's why they test, but that's going to feed into SLS's slip sliding schedule.



tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 13:42 - 12 дек. 2018 г.

So the "best result" would be a "facility issue" as they call it. Where one of the GSE (ground support equipment) lines had a bad day. It is high up on the powerhead, but camera angle doesn't show the source. Would be VERY rare for a RS-25 itself to have a tantrum.




13:44 - 12 дек. 2018 г.

Also, the abort wasn't immediate. The amount of seconds it was blowing fire out of the wrong end......I would have thought the engine would have shut itself down sooner if it was the engine itself.

zandr

https://www.youtube.com/watch?v=Mgn6WtnpTkw
ЦитироватьSLS RS-25 Engine Aborted Test, 12 December 2018 
SciNews
https://www.youtube.com/watch?v=Mgn6WtnpTkw3:40
A hotfire test of an Aerojet Rocketdyne RS-25 rocket engine was terminated early on the A-1 Test Stand at the John C. Stennis Space Center in Mississippi, on 12 December 2018, at 21:25 UTC (15:25 CST, 16:25 EST). The causes are under investigation.

Чебурашка

Наконец-то закончили Static Test Article водородного бака.
Повезут на тест устанавливать.

https://www.nasa.gov/exploration/systems/sls/18-045.html

Опоздали всего на 6 месяцев к прошлогоднему графику, что даже удивительно.





tnt22

https://www.nasa.gov/press-release/rs-25-early-termination-update
Цитировать

Dec. 21, 2018
MEDIA ADVISORY S18-054

RS-25 Early Termination Update

During an RS-25 engine test on December 12, a manual early termination was initiated when data indicated an anomaly. An investigation into the incident remains underway although initial indications are that damage to the test stand and engine are limited.

Calvin Thompson
Stennis Space Center
228-688-3749
calvin.l.thompson@nasa.gov

Last Updated: Dec. 21, 2018
Editor: LaToya Dean

Чебурашка

Баржа Приплыла.

Из-за грёбанного шатдауна непонятно как будут дальше идти работы



tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 2 ч. назад

FEATURE ARTICLE:

Third SLS STA headed to Marshall as limited work continues during NASA shutdown -

https://www.nasaspaceflight.com/2019/01/third-sls-sta-marshall-limited-work-nasa-shutdown/ ...

- by Philip Sloss


Чебурашка

Прочёл статью, так и не понял - как и когда будут устанавливаться сами двигатели?

tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 8 мин. назад

ARTICLE:
Government MECO delays RS-25 testing following premature shutdown -

https://www.nasaspaceflight.com/2019/01/government-meco-rs-25-premature-shutdown/ ...

Спойлер

[свернуть]

Чебурашка

https://www.nasa.gov/exploration/systems/sls/multimedia/liquid-hydrogen-tank-test-article-loaded-into-test-stand.html


Красота. 
Не то что кривая водокачка этого фигляра Маска   :D  

Бак жидкого водорода на стенде.... 2000 кубических метров.

Так что им осталось сделать.?
По Static Test Articles не готов ещё только бак жидкого кислорода..
По 1-ому лётному изделию Core Stage-1 не хватает двигательной секции и бака жидкого водорода.
И можно скручивать всё вместе  ;)



tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 6 мин. назад

FEATURE ARTICLE:
NASA Stennis wrapping up B-2 Stand activation for SLS Green Run testing -

https://www.nasaspaceflight.com/2019/01/nasa-stennis-b-2-stand-activation-sls-green-run/ ...

4,000 words (over two pages), by Philip Sloss

Спойлер


[свернуть]

поц

http://ecoruspace.me/
ЦитироватьОбнародованы данные о ходе создания РН семейства СЛС
Космическое агентство США обнародовало данные согласно которым оно осуществило установку самого большого элемента конструкции РН СЛС (бак для хранения жидкого водорода) на испытательный стенд 4693 в Центре космических полетов НАСА им. Маршалла в Хантсвилле, штат Алабама. В ходе испытаний конструкция при помощи гидравлических цилиндров будет подвергнута таким же нагрузкам, которые конструкция будет испытывать в ходе полета. Размер бака составляет 45 метров (габариты стенда 66 метров). Полная длина блока будет составлять 65 метров, диаметр 8.4 метра, ДУ - четыре RS-25.

Чебурашка

#1917
Мой малыш растёт не по годам и уже читает по слогам... 

http://www.boeing.com/features/2019/02/sls-forward-join-02-19.page Видео по ссылке хорошее

ЦитироватьBoeing employees at NASA's Michoud facility complete a forward join on the SLS rocket core stage.

Boeing teams working on America's next great rocket, the Space Launch System (SLS), are now connecting the rocket segments for final assembly.

Boeing workers at NASA's Michoud facility in New Orleans assembled the top half of the SLS core stage – the intertank, liquid oxygen tank and forward skirt - in a vertical stacking cell. The process is called a forward join. The forward join will then be connected to the bottom half of the rocket – the liquid hydrogen tank and engine section – to complete the 212-foot core stage.

At the same time, production of the second core stage for Exploration Mission 2 is underway.

Once the completed core stage is tested at Stennis Space Center, it will be stacked at Kennedy Space Center with the upper part of the rocket, the Interim Cryogenic Propulsion Stage, and the Orion capsule, and joined to the rocket's twin solid rocket boosters, in preparation for first launch, Exploration Mission 1 (EM1). The SLS will carry to Orion out of Earth's atmosphere to orbit the moon, in preparation for launching astronauts even deeper into space.

tnt22

ЦитироватьWatch as Crews Lift the SLS Liquid Hydrogen Tank Test Article in Test Stand

NASA's Marshall Space Flight Center

Опубликовано: 1 февр. 2019 г.

To ensure NASA's Space Launch System rocket is ready for Exploration Mission-1, the first integrated flight that will send the Orion spacecraft beyond the Moon, engineers are performing a series of tests at NASA's Marshall Space Flight Center in Huntsville, Alabama. Crews loaded the 149-foot liquid hydrogen tank structural test article, the largest piece of structural test hardware for the core stage of SLS, into Test Stand 4693 Jan. 14. Dozens of hydraulic cylinders in the test stand will push and pull on the tank to simulate the stresses and loads it will endure during liftoff and flight. Test Stand 4693 is one of the newest test stands at Marshall, and the liquid hydrogen structural test article is the first piece of hardware to be tested in the stand.
https://www.youtube.com/watch?v=4jX5AHg_cGUhttps://www.youtube.com/watch?v=4jX5AHg_cGU (0:35)

tnt22

ЦитироватьLearn How Engineers Connected the Top of the SLS Core Stage.

NASA's Marshall Space Flight Center

Опубликовано: 7 февр. 2019 г.

This video animation shows how engineers at NASA's Michoud Assembly Facility in New Orleans connected the liquid oxygen tank with the intertank and the forward skirt to complete the forward join – or the forward part – of the core stage of NASA's Space Launch System, America's first deep space rocket to take humans beyond the Moon. Altogether, the structure makes up 66 feet of the total 212-foot-tall core stage. The completion of the forward join marks the beginning of the integration and the assembly of the SLS core stage by NASA and Boeing, the SLS prime contractor.
https://www.youtube.com/watch?v=hdxK8_5Yy-shttps://www.youtube.com/watch?v=hdxK8_5Yy-s (0:28)