SLS - space launch system (3-я попытка)

Автор Salo, 16.02.2012 10:25:55

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tnt22

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

All times Eastern

APRIL

April 4, Thursday

2:30 p.m. – RS-25 Engine Test
18:30 UTC

tnt22

ЦитироватьEM-1 Alternative Study overview.

NASASpaceFlight Videos

Опубликовано: 1 апр. 2019 г.

A fascinating overview of the EM-1 study that showed commercial alternatives didn't really work out as viable.
https://www.youtube.com/watch?v=rEkaWMKg_2whttps://www.youtube.com/watch?v=rEkaWMKg_2w (6:51)

tnt22

ЦитироватьTown Hall with NASA Administrator Jim Bridenstine

NASA

Опубликовано: 1 апр. 2019 г.

Headquarters hosted an agencywide town hall with NASA Administrator Jim Bridenstine on Monday, April 1, at 1:30 p.m. EDT. NASA HQ employees were invited to join the Administrator in the Webb auditorium for this important discussion on our Moon to Mars plans.
https://www.youtube.com/watch?v=o2gz2E-Wrwshttps://www.youtube.com/watch?v=o2gz2E-Wrws (54:31)

Чебурашка

Джими только что про пуск SLS сказал 

"....by the end of twenty twenty..."  - конец 2020

Чебурашка

#1984
Джими наивный мальчик:  "We start to meet schedules, we start to meet cost..."     :D

Что-то у него общее с Рогозиным есть 

Astro Cat

ЦитироватьЧебурашка пишет:
конец 2020
Это всегда означает переезд на на следующий год минимум. )))
ЦитироватьЧебурашка пишет:
Что-то у него общее с Рогозиным есть
Два сапога. Только у этого денег больше. )

tnt22

ЦитироватьSLS RS-25 Engine Test, 4 April 2019

SciNews

Опубликовано: 4 апр. 2019 г.

An Aerojet Rocketdyne RS-25 rocket engine was tested on the A-1 Test Stand at the John C. Stennis Space Center in Mississippi, on 4 April 2019, at 19:35 UTC (14:35 CDT, 15:35 EDT). The test had a duration of 500 seconds.NASA's Space Launch System (SLS) will be powered by four RS-25 engines firing simultaneously.

Credit: NASA
https://www.youtube.com/watch?v=iHp6_qu5v1shttps://www.youtube.com/watch?v=iHp6_qu5v1s (9:15)

tnt22

ЦитироватьNASA Stennis Live Stream

NASA Stennis

Трансляция началась 94 минуты назад
https://www.youtube.com/watch?v=DTebtCJgoF0https://www.youtube.com/watch?v=DTebtCJgoF0 (16:18)

tnt22

ЦитироватьNASA Achieves Testing Milestone with Engines for Initial SLS Missions

NASA Stennis

Опубликовано: 4 апр. 2019 г.

NASA conducted a hot fire test of RS-25 flight engine No. 2062 on the A-1 Test Stand at Stennis Space Center on April 4, with a full-duration of 500 seconds. The hot fire caps more than four years of testing for engines that will help power the first four missions of NASA's new Space Launch System (SLS) rocket. All 16 former space shuttle main engines that will help launch the first four SLS missions have undergone acceptance testing and have completed developmental and acceptance testing for new controllers to be used by the engines. It also concludes a 51-month test series that demonstrated RS-25 engines can perform at the higher power level needed to launch the super heavy-lift SLS rocket.
https://www.youtube.com/watch?v=tIME9IUQoDghttps://www.youtube.com/watch?v=tIME9IUQoDg (8:50)

tnt22

#1989
https://www.nasa.gov/centers/stennis/news/NASA-Achieves-Rocket-Engine-Test-Milestone-Needed-for-Moon-Missions
ЦитироватьApril 5, 2019
RELEASE S19-007

NASA Achieves Rocket Engine Test Milestone Needed for Moon Missions

NASA is a step closer to returning astronauts to the Moon in the next five years following a successful engine test on Thursday at NASA's Stennis Space Center near Bay St. Louis, Mississippi. The latest "hot fire" was the culmination of four-plus years of testing for the RS-25 engines that will send the first four Space Launch System (SLS) rockets into space.


NASA conducts a test of RS-25 flight engine No. 2062 on April 4 on the A-1 Test Stand at Stennis Space Center near Bay St. Louis, Miss. The test marked a major milestone in NASA's march forward to Moon missions. All 16 RS-25 engines that will help power the first four flights of NASA's new Space Launch System rocket now have been tested.
Credits: NASA/SSC

"This completes four years of focused work by an exceptional Stennis test team," Stennis Director Rick Gilbrech said. "It represents yet another chapter in Stennis' long history of testing leadership and excellence in support of this nation's space exploration efforts. Everyone involved should feel proud of their work and contributions."

Thursday's hot fire on Stennis' A-1 Test Stand completed:
    [/li]
  • Acceptance testing of all 16 former space shuttle main engines that will help launch the first four SLS missions. NASA has contracted with Aerojet Rocketdyne to build new RS-25 engines for additional SLS missions, and work already is underway to do so in the company's factory in Canoga Park, California.
  • Developmental and flightworthy testing for new controllers (plus one spare) to be used by the heritage RS-25 engines for the first four missions.
  • A 51-month test series that demonstrated RS-25 engines can perform at the higher power level needed to launch the super heavy-lift SLS rocket.
"Engines are now a 'go' for missions to send astronauts forward to the Moon to learn and prepare for missions to Mars," said Johnny Heflin, deputy manager of the SLS Liquid Engines Office at NASA's Marshall Space Flight Center in Huntsville, Alabama. "We're ready to provide the power to explore the Moon and beyond."
Спойлер

RS-25 flight engine No. 2062 is lifted onto the A-1 Test Stand at NASA's Stennis Space Center near Bay St. Louis, Miss. The Aerojet Rocketdyne-built engine was delivered to the stand March 20 and test fired April 4.
Credits: NASA/SSC

The RS-25 rocket engine test era began Jan. 9, 2015, with a 500-second – more than 8 minutes – hot fire of RS-25 developmental engine No. 0525 on the A-1 Test Stand at Stennis. NASA tested the first SLS flight engine on March 10, 2016. Altogether, the agency has conducted 32 developmental and flight engine tests for a total of 14,754 seconds – more than four hours – of cumulative hot fire – all on the A-1 stand at Stennis.

Having launched 135 space shuttle missions, these main engines are considered the most tested engines in the world. When the Space Shuttle Program ended in 2011, NASA still had 16 engines that ultimately were modified for SLS.

These engines were originally designed to perform at a certain power level, known as 100 percent. Over time, the engines were upgraded to operate at higher and higher power levels, up to 104.5 percent operating power level by the end of the shuttle program. For SLS, that operating level has to be pushed even higher.

To help accomplish that, and to interface with new rocket avionics systems, NASA designed and tested a new engine controller, which serves as the "brain" of the engine to help monitor engine operation and facilitate communication between the engine and rocket. Early developmental testing at Stennis provided critical information for designing the new controller.

The first new flight engine controller was tested at Stennis in March 2017, with a string of controller hot fires to follow. The April 4 test marked the testing of the 17th engine controller for use on SLS flights, providing enough for all 16 heritage RS-25 engines.

With development of the new controllers, NASA had to test the new power level as well. First, it was demonstrated that the engine could perform at the needed 111 percent power level. Next, NASA needed to prove a margin of operating safety.

In February 2018, operators pushed the engine to 113 percent power for a total of 50 seconds. It lengthened that firing time in two subsequent tests, until late this February, when the engine was fired at 113 percent power for 430 seconds of a 510-second test.

That set the stage for Thursday's successful test of flight engine No. 2062. When this specific engine fires again, it will help send astronauts aboard Orion around the Moon on a test flight known as Exploration Mission-2.

The president's direction from Space Policy Directive-1 galvanizes NASA to return to the Moon and builds on progress on the Space Launch System rocket and Orion spacecraft, efforts with commercial and international partners, and knowledge gained from the current robotic presence at the Moon and Mars.

Valerie Buckingham
Stennis Space Center, Bay St. Louis, Mississippi
228-688-3898
valerie.d.buckingham@nasa.gov
[свернуть]
Last Updated: April 5, 2019
Editor: LaToya Dean

tnt22

#1990
https://tass.ru/kosmos/6301466
Цитировать5 АПР, 17:25
NASA завершило огневые испытания двигателей RS-25, предназначенных для полетов на Марс

Двигатели предназначены для ракеты Space Launch System

ВАШИНГТОН, 5 апреля. /ТАСС/. NASA объявило в пятницу о завершении программы огневых испытаний 16 усовершенствованных двигателей RS-25, предназначенных для ракет-носителей Space Launch System (SLS), с помощью которых США рассчитывают начать освоение Марса.

Как отметила пресс-служба американского космического ведомства, США "стали на шаг ближе к возвращению в ближайшие пять лет астронавтов на Луну... и к подготовке марсианских миссий".

RS-25 ранее устанавливались на шаттлах, эксплуатация которых была завершена в 2011 году после 135 запусков. От этой программы в распоряжении NASA осталось 16 двигателей, которые были модернизированы под параметры носителя SLS. Их огневые испытания проводились, начиная с марта 2016 года, на полигоне Космического центра им. Джона Стенниса, расположенного в Хэнкоке (штат Миссисипи). Последние по времени прошли в четверг: двигатель размером с компактный автомобиль весом 3,6 т успешно отработал 500 секунд.

"Эти шестнадцать двигателей - по четыре на каждый носитель - помогут осуществить первые четыре миссии SLS", - указала пресс-служба.

По заказу NASA разработку новой тяжелой ракеты в течение уже нескольких лет ведет компания Boeing. Предполагается, что SLS сможет выводить на орбиту грузы массой от 70 до 130 т. По расчетам специалистов, один ее запуск будет стоить около $500 млн - в полтора раза меньше, чем каждая миссия шаттлов.

Цель - Марс

SLS будет выводить в космос разрабатываемый пилотируемый корабль Orion. Планируется, что свой первый полет без экипажа с помощью нового носителя он совершит в 2020 году: облетит Луну и вернется на Землю. С экипажем по такому же маршруту - в 2022 году.

В бюджет NASA на 2020 финансовый год, который начнется 1 октября текущего календарного года, заложено $1,78 млрд на SLS. Это примерно на $375 млн меньше, чем на данную программу было выделено Конгрессом на 2019 финансовый год.

Директор NASA Джеймс Брайденстайн, выступая во вторник в комитете по науке, космосу и технологиям Палаты представителей Конгресса, сообщил, что его ведомство намеревается отправить астронавтов на Марс в 2033 году.

tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 18 мин. назад

FEATURE ARTICLE:

SLS flight software and avionics in "run for record" testing -

https://www.nasaspaceflight.com/2019/04/sls-flight-software-avionics-run-record-testing/ ...

An amazing 5,000+ word feature/interview (over two pages) by Philip Sloss, along with some photos from his visit.

#SLSIsFighting

Lead by Nathan Koga for NSF/L2





tnt22

https://blogs.nasa.gov/kennedy/2019/04/09/crawler-transporter-2-gets-engine-maintenance-in-preps-for-exploration-mission-1/
ЦитироватьCrawler-Transporter 2 Gets Engine Maintenance in Preps for Exploration Mission-1

Anna Heiney
Posted Apr 9, 2019 at 11:21 am


Pat Brown, left, and William Vardaman, mechanical technicians with the Jacobs contracting team, perform engine maintenance on NASA's crawler-transporter 2 on March 26, 2019.

Even the toughest vehicles need regular maintenance to function at their best. Recently, William Vardaman and Pat Brown, both working under the Jacobs contracting team, performed engine maintenance on NASA's crawler-transporter 2 in the crawler yard located in the agency's Kennedy Space Center's Launch Complex 39 area in Florida.



Vardaman, a mechanical technician with the Jacobs contracting team, performs engine maintenance on NASA's crawler-transporter 2 on March 26, 2019.The massive, tracked vehicles are powered by large electrical power engines and two 16-cylinder American Locomotive Company (ALCO) engines. Vardaman and Brown, both mechanical technicians supporting the agency's Test and Operations Support Contract, spent several days rebuilding the vehicle's fuel pump assemblies on both ALCO engines. They also installed new oil pumps that will lubricate the ALCOs fr om the top down before they're started, minimizing future wear.

This is one of two crawler-transporters that carried rockets and spacecraft, including the Apollo/Saturn V and space shuttle, from the Vehicle Assembly Building (VAB) to the launch pad. Now, they're getting ready for NASA's accelerated return to the Moon.

Crawler-transporter 2 has been modified and upgraded to carry the mobile launcher and NASA's Space Launch System rocket, topped by the Orion spacecraft, for Exploration Mission-1, which will launch in 2020. The agency's Exploration Ground Systems oversaw extensive upgrades to crawler-transporter 2, including new generators, gear assemblies, roller bearings and brakes, as well as the hydraulic jacking, equalization and leveling (JEL) cylinders that keep its carrying surface level.

Last fall, crawler-transporter 2 carried the newly completed mobile launcher from its construction site north of the VAB, out to Launch Pad 39B, then into the VAB, wh ere the mobile launcher continues extensive testing. The crawler is gearing up for another move of the mobile launcher back to the pad later this spring for more testing.

Photo credits: NASA/Kim Shiflett

Сергей

Конечно концепция понятна - использовать ранее отработанное. Но с другой стороны длинные  ТТУ, секционные, с стальными корпусами, с низким УИ, как то кривовато. Лучше 4 шт. , половинной длины , кокон, ТТ современного уровня.

tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 5 ч. назад

FEATURE ARTICLE:
Boeing, NASA look to finish first SLS Core Stage by end of year -

https://www.nasaspaceflight.com/2019/04/boeing-nasa-finish-sls-core-stage-end-year/ ...

- Another awesome (and lengthy - over two pages) interview/feature from Philip Sloss

#SLSIsFighting

Спойлер


[свернуть]

Чебурашка

Короче, поменяли последовательность сборки

Раньше планировали состоыковать  двигательную секцию и водородный бак. Причём стыковка в вертикальном положении.
Потом две сборки  (двигательная секция + водородный бак     и  межступенчетый переходник + кислородный бак + приборный отсек) состыковать между собой уже в горизонтальном положении.
Сейчас собираются пристыковать отдельно водородный бак к уже готовой сборке   межступенчетый переходник + кислородный бак + приборный отсек. Это уже совсем скоро - в мае.
А в июле к этому всему присоединить двигательный отсек.

tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 3 мин. назад

FEATURE ARTICLE:
NASA Launch Services Program outlines the alternative launcher review into EM-1 -

https://www.nasaspaceflight.com/2019/04/nasa-lsp-studies-alternate-orion-options/ ...

- An epic 6,000 word (over three pages) exclusive interview/feature by Philip Sloss.

How SLS won the battle, but not the war.

(Render by @TheFavoritist)


tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 8 мин. назад

SLS All-Hands meeting coming up. We expect the "Green Run" to REMAIN in the test flow.

This also means the chances of SLS in 2020 are pretty much gone, but - as we've seen with the Commercial Crew testing - the Green Run (all four RS-25s firing on the core) is good for safety.


tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 2 мин. назад

Here's a cool article from Philip Sloss per what the Green Run is about and the huge test stand that will be involved:

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

Чебурашка

Верхнюю полусборку уложили в горизнотальное положение  для стыковки с водородным баком в мае