SLS - space launch system (3-я попытка)

[tnt22]

Orbital ATK‏Подлинная учетная запись @OrbitalATK 7 мин. назад
 
We're making progress on the boosters for @NASA_SLS! A completed booster segment is sent to storage pending transport to @NASAKennedy #SLS
 

[tnt22]

Космический центр Кеннеди NASA (KSC) и компания Hensel Phelps Construction Co. успешно завершили модификацию здания сборки носителей (VAB) в начале февраля, создав место для новой ракеты SLS и космического аппарата Орион.

http://www.spaceflightinsider.com/organizations/nasa/orion-update-progress-setbacks-february-2017/

Orion update: progress and setbacks in February 2017

Mackenzie Kane
March 13th, 2017

Спойлер

High up in the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, an overhead crane lowers the final work platform, A north, into place for installation in High Bay 3 on Jan. 12. The platform is being installed and secured on its rail beam high up on the north wall of the high bay. The installation of the final topmost level completes the 10 levels of work platforms, 20 platform halves altogether, that will surround NASA's Space Launch System rocket and the Orion spacecraft and allow access during processing for missions, including the first uncrewed flight test of Orion atop the SLS rocket. Photo & Caption Credit: Frank Michaux / NASA

[свернуть]

NASA's Kennedy Space Center (KSC) and Hensel Phelps Construction Co. successfully completed the modifications to the Vehicle Assembly Building (VAB) in early February, making room for the new Space Launch System (SLS) rocket and the Orion spacecraft.

KSC needed to remove the old space shuttle hardware fr om the VAB in order to make room for the 10 new levels of work platforms. These multi-level work platforms will allow the large portions of the SLS rocket to be integrated and stacked with ease in High Bay 3 (HB3).

Спойлер

The American flag can be seen hanging from the final work platform, A north, as the platform is lifted up by crane from the transfer aisle in the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. Photo & Caption Credit: Frank Michaux / NASA

[свернуть]

During the renovation to HB3, High Bay 2 (HB2) also underwent minor renovations for housing commercial rockets in the future. KSC has completed a major milestone that not only progresses deep space travel but also allows the space center to assert itself as a future spaceport.

Спойлер

As progress continues to be made to accommodate the SLS rocket at KSC, the auxiliary engines for Orion's European Service Module (ESM) completed successful hot-fire testing in February. Aerojet Rocketdyne has been assisting Lockheed Martin in refurbishing the rockets used during the Space Shuttle program.

The eight auxiliary engines, originally the Orbital Maneuvering Subsystem (OMS) engines from the shuttles, are part of Rocketdyne's R-4D design which has compiled a 100 percent mission success record over the years. Rocketdyne is also supplying the 12 monopropellant engines for the Orion crew module and the jettison motor for the launch abort system.

By completing a successful test-fire, the Orion program is one step closer to achieving deep space travel.

Once the Orion capsule is successfully launched aboard the SLS for Exploration Mission-1 (EM-1), Israel's StemRad will be performing product testing as Orion completes a lunar flyby. Developed under CEO Oren Milstein, the AstroRad Radiation Shield is a multi-layered shield for astronauts that accurately cover important organs in the human body.

During EM-1, StemRad will have two "phantom" torso dummies aboard, one wearing the AstroRad Radiation Shield while the other is unprotected. The torso dummies will monitor the radiation absorption experienced during the flyby and will be analyzed once returned to Earth.

StemRad is no stranger to radiation shielding technology, producing a belt that protects workers from harmful gamma ray radiation as a result of nuclear disasters such as Chernobyl and Fukushima.

Since most severe cases of death due to radiation exposure is caused by bone marrow failure, StemRad aimed to find a way to protect bone marrow. By layering protective materials over the pelvis wh ere bone marrow stem cells are located, it allows for damaged bone marrow to be rejuvenated by the shielded stem cells after an exposure.

Before any product tests can be confirmed aboard the Orion capsule for EM-1, NASA needs to re-examine the feasibility of making the Orion capsule a multi-purpose crew vehicle. A NASA authorization bill – passed unanimously by the Senate on February 17 – requires NASA to confirm that the Orion capsule has the capabilities of delivering crew and cargo to the International Space Station (ISS), if other vehicles are unable to execute those functions, along with being a safe deep space crew vehicle.

Following the passing of the authorization bill, NASA proposed submitting a report to assess the feasibility of sending a crew in the Orion capsule for EM-1. A crewed Orion mission was not scheduled to take place until 2021 with Exploration Mission-2 (EM-2).

However, the Trump administration asked NASA to advance the crewed mission to take place on EM-1. This would cause the maiden launch of the Orion capsule aboard the SLS to be postponed until beyond 2019 and require additional funding. The official NASA reports for the multi-purpose crew vehicle re-examination and the crewed EM-1 assessment are due by mid-April and early spring, respectively. Until then, EM-1 remains scheduled to launch, with no crew, in late 2018.  

Lastly, on February 27, the Interim Cryogenic Propulsion Stage (ICPS), which will be used as a second stage on the debut flight of NASA's SLS rocket, was sent by barge to United Launch Alliance's Delta IV Operation Center at Cape Canaveral Air Force Station in Florida.

Video Courtesy of NASA Kennedy

[свернуть]

[tnt22]

Time Lapse of Work Platforms Installed in the Vehicle Assembly Building (1:13)

[silentpom]

Not пишет:
шесть процентов , что приблизительно равно 600 миллионам баксов. Маск действительно рыдает.

вы языком аглицким совсем не владеете? сами читаете, что пишут?
Трамп срезал не 600 лямов, как сказал, а 59. 541 это запланированное снижение цены, которая снижается при каждом  новом LRIPе. ну и получаем 0.6%

[silentpom]

Борис Лучников пишет:
Это у 70-тонника или у 105-тонника?

уже испытали работу 5 секционного бустера, он будет у всех - 
70 от 105 будет отличаться верхней ступенью (1 двигатель RL-10 против 4). 1 несерьезно, но другого под рукой ничего нет, потому запустят первый вариант из чего есть. 

потом где-то там в планах заменить бустер непонятно на что (на другой ТТУ бустер или на всякие разные ЖРД, но мне кажется что этого не будет).

 даже 4 RL-10 смотрятся как-то слабовато, но ничего другого нет

[Floppy Disk]

ПАО «Мегафон» (MOEX: MFON) начало оказывать услуги мобильной связи четвертого поколения стандарта LTE в Камчатском крае, говорится в сообщении Дальневосточного филиала оператора.
Возможность запустить на Камчатке сеть 4G/LTE появилась после перевода магистрального канала оператора со спутниковой трансмиссии на волоконно-оптическую линию (ВОЛС), в результате чего пропускная способность канала значительно выросла.
Ранее сообщалось, что оператор арендовал канал на недавно введенной в эксплуатацию подводной ВОЛС «Сахалин-Магадан-Камчатка».
Вспоминаются немецкие танки и американские корабли на плакатах к 9 мая.

[tnt22]

NASA_SLS‏Подлинная учетная запись @NASA_SLS 6 мин. назад

.@ulalaunch's Interim Cryogenic Propulsion Stage is unloaded at Cape Canaveral for integration for the first flight of SLS & @NASA_Orion .

[tnt22]

1-мин обзор
Inside KSC! for March 17, 2017

  (1:29)

[tnt22]

NASA_SLS‏Подлинная учетная запись @NASA_SLS 41 мин. назад

RS-25 test tmrw @NASAStennis; 1st test with the new engine controller! Will stream live - stay tuned for details! #NASASLS @AerojetRdyne

[che wi]

Видеотрансляция теста RS-25 – сегодня на фейсбуке в районе 15:00 CDT / 20:00 UTC / 23:00 MSK

https://www.facebook.com/NASASLS/

[tnt22]

Chris B - NSF‏ @NASASpaceflight 60 мин. назад

ARTICLE: RS-25 engine controller set for static fire test at Stennis - https://www.nasaspaceflight.com/2017/03/rs-25-engine-controller-static-fire-test-stennis/ ... - by Philip Sloss

Спойлер

[свернуть]

https://www.nasaspaceflight.com/2017/03/rs-25-engine-controller-static-fire-test-stennis/

RS-25 engine controller set for static fire test at Stennis
March 23, 2017 by Philip Sloss

 

NASA, Aerojet Rocketdyne, and Syncom Space Services are preparing to conduct the first hot-fire test of a flight model RS-25 engine controller on Thursday afternoon. The eight-minute long test firing will occur in the A-1 test stand at the Stennis Space Center in Mississippi. RS-25 engines will power the Core Stage of NASA's Space Launch System (SLS) launch vehicle, planned for the first launch in about two years.
 
RS-25 Test:

Aerojet Rocketdyne is the prime contractor for the RS-25. Syncom Space Services is the prime contractor for Stennis facilities and operations.
The new Honeywell engine controller unit (ECU) is bolted and wired onto development engine 0528, which is being used for the current series of hot-fire tests in the A-1 stand at Stennis.
 
The test team at Stennis is targeting engine ignition for 3 pm Central time (20:00 UTC). The primary objective of the test is to acceptance test (or "green run") the new FM2 flight model ECU. Each RS-25 engine has a dedicated, redundant controller unit that controls its operation, monitors its health, and communicates with the SLS flight computers.

Спойлер

FM2 was delivered to Stennis in early this month and installed on development engine 0528 (E0528 ), following shortly behind the delivery of the FM1 unit last month to the Marshall Space Flight Center (MSFC) in Huntsville, Alabama.



The FM1 unit is dedicated for ground testing. After FM2 is green run it will be removed fr om E0528, taken to Aerojet Rocketdyne's facility at Stennis, and installed on one of the flight engines designated for the first SLS launch. Eventually, the flight engines will be shipped to the Michoud Assembly Facility in New Orleans, Louisiana, for installation into the first flight Core Stage when that point in assembly is reached.

NASA spokesperson Kim Henry reported the planned duration of the test is 500 seconds, which is the expected operating time of the RS-25 engines for SLS launches. During the test, the engine will be throttled at different thrust levels; it will be throttled at 109 percent of rated power level (RPL) for 280 seconds, at 100 percent for 35 seconds, at 90 percent for 27 seconds, and at 80 percent for 97 seconds.

*Click here for more RS-25 News Articles*

Henry noted the test will also demonstrate that the engine can start satisfactorily with "weak" LOX inlet conditions and "strong" fuel inlet conditions.

The RS-25 was originally developed in the 1970s for the Space Shuttle Program when it was known as the Space Shuttle Main Engine (SSME).



Three SSMEs were used in the Shuttle system to help propel Shuttle orbiter vehicles into Earth orbit.

NASA decided on a design of the SLS that uses four RS-25 engines in the Core Stage; as with Shuttle, those are combined in SLS with two Solid Rocket Boosters that fire for the first two minutes of launch. The engines burn cryogenic liquid hydrogen (LH2) and liquid oxygen (LOX) that fed to them from separate Core Stage propellant tanks wh ere they are stored.

RS-25 hot-fire testing began at Stennis in January 2015, to demonstrate and certify engine operation at the higher performance levels for SLS. The engines run in SLS at higher pressures and higher thrust than on Shuttle, and the hydrolox propellant is also fed to them at colder temperatures.



A new engine control system, including a new engine controller, is also being certified to fly with the SLS vehicle; this green run test of the flight model ECU also provides some of the required data for certification.

Thursday's hot-fire will be the fifth in a test series with E0528 that began in July of last year. So far, a total of twelve tests have been conducted using both development engines and one flight engine retained from the Shuttle Program.

All prior RS-25 hot-fire tests used an engineering model of the new controller that is functionally equivalent to the flight units but could be produced earlier. Certification of the new control system and controller also involves lab testing at MSFC, and at Aerojet Rocketdyne and Honeywell facilities around the United States.

Hot-fire tests are designed to meet several test objectives and one of the objectives in the last test was to evaluate a requirements change request from the SLS Program to run the engine at a slightly higher LOX inlet pressure than planned.

"The high LOX inlet pressure demonstration last test went very well," Henry noted. "The actual value demonstrated slightly exceeded the new vehicle requirement, and the engine performed nominally."



Running the engine at the slightly higher inlet pressure will maintain vehicle structural margins during parts of the boost phase of launch without needing to throttle the engines down. Future hot-fire tests will also continue to explore engine performance at the higher LOX inlet pressure.

Deliveries of the new flight model engine controllers for green run testing were originally expected last year. The current plan this year is to individually green run more of the flight ECUs installed in both development and flight engines. New flight controllers (FM3, FM4, and so on) will be rotated onto E0528 on the test stand with two or three more hot-fire tests planned for about once a month, followed by an acceptance test of two full flight engines in the Summer.

The engines designated for the first SLS launch will get an additional pre-launch test firing together in a green run of the completed Core Stage; that test will occur on the nearby B-2 test stand at Stennis.

(Images: Via NASA and L2 – including photos from Philip Sloss and SLS renders from L2 artist Nathan Koga – The full gallery of Nathan's (SpaceX Dragon to MCT, SLS, Commercial Crew and more) L2 images can be *found here*)

[свернуть]

[tnt22]

NASA Kennedy / KSC‏Подлинная учетная запись @NASAKennedy 19 мин. назад

Crawler on the move! Crawler Transporter-2 has recently been upgraded with new equipment for transporting the new #SLS rocket. @NASA_SLS

[tnt22]

che wi пишет:
Видеотрансляция теста RS-25 – сегодня на фейсбуке в районе 15:00 CDT / 20:00 UTC / 23:00 MSK

 https://www.facebook.com/NASASLS/

В добавку, чтоб в глаза бросалось

NASA_SLS‏Подлинная учетная запись @NASA_SLS 2 ч. назад
 
Catch today's RS-25 test on Facebook Live targeted for 3pm CDT. Check back for status updates for the latest test time. #NASASLS

[tnt22]

По трансляции теста RS-25 - почему только на Мордокниге?

Chris B - NSF‏ @NASASpaceflight 2 ч. назад

It's only on Facebook because Zuckerberg is a massive RS-25 fan. I just tweeted that, so it's now a fact.

[tnt22]

(1:01:30)
Сам тест в конце трансляции

[tnt22]

NASA Ignite Space Launch System Engine RS-25

(10:00)

Опубликовано: 23 мар. 2017 г.

NASA performed a full flight duration test fire of the RS-25 engine that will power the Space Launch System (SLS) rocket today. Ignition occurred just after UTC from the Stennis Space Center.

[tnt22]

STATIC FIRE! RS-25 fires up with new engine controller - https://forum.nasaspaceflight.com/index.php?topic=35220.msg1657647#msg1657647 ...





Shutdown! Test complete. Seemed to be full duration. New engine controller in its first outing.

[tnt22]

NASA_SLS‏Подлинная учетная запись @NASA_SLS 5 мин. назад

Congrats on a great test! @AerojetRdyne #RS25 engine test goes full duration, 500 seconds @NASAStennis! #NASASLS @NASA

[tnt22]

Spaceflight101‏ @Spaceflight101 26 мин. назад

RS-25 Engine Test kicks off SLS Engine Controller Certification Campaign - http://spaceflight101.com/rs-25-engine-test-kicks-off-sls-engine-controller-certification-campaign/ ...

http://spaceflight101.com/rs-25-engine-test-kicks-off-sls-engine-controller-certification-campaign/

RS-25 Engine Test kicks off SLS Engine Controller Certification Campaign
  March 23, 2017
            

Photo: NASA Marshall

A former Space Shuttle development & test engine fired up at NASA's Stennis Space Center for the second time this year in support of the Space Launch System program to close out a multi-year testing campaign toward the maiden launch of NASA's new heavy-lifter.

Thursday's test was 13th SLS engine test and the first of a flight-model flight controller, the first of several such tests to verify all of the controllers flying on the first SLS mission currently scheduled for late 2018.

The 500-second test utilized the A-1 test stand at Stennis and was carried out by NASA, prime RS-25 engine contractor Aerojet Rocketdyne and Syncom Space Services which serves as the prime contractor for Stennis facilities. Thursday's test involved development engine 0528 and began at 20 UTC, primarily dedicated to putting the ECU-2 engine controller through a full cycle to verify the performance of the Honeywell-built unit in action.

Спойлер

The delivery of the Flight Model Engine Control Units (ECUs) had become a bottleneck in RS-25's testing campaign, prompting teams to ins ert an additional test firing in February to verify a pair of small tweaks to the engine and its operation, specifically a low-pressure fuel duct and an increase in Liquid Oxygen inlet pressure that was the result of a request from the vehicle dynamics division to help SLS better deal with loads on the launch vehicle during ascent.
 
 
Engine Controller Installation on Engine 0528 – Photo: NASA/SSC

The Engine Controllers are the major change from the Shuttle-era RS-25 to the SLS main engine, incorporating a number of simplifications and changes to comply with the modern avionics system of SLS versus the decades-old Shuttle system. The first flight-worthy flight controller was delivered to the Marshall Spaceflight Center for a bench testing campaign while ECU-2 will become the first Engine Controller to support a mission, arriving at Stennis in early March to be integrated with Engine 0528 for Thursday's test.

The engine controller builds the primary interface between the launch vehicle and all of the engine actuators and sensors, tasked with monitoring the engine's performance, regulating the various valves and pumps to command changes in thrust and mixture ratio and ensure safe ignition and shutdown.


Photo: NASA

Over the course of the 500-second firing, the Engine Controller was put through its paces and tasked with commanding the engine through a series of thrust settings – maintaining the engine's new nominal thrust setting of 109% for over half the test duration and throttling between 80 and 100% of rated performance. Additionally, the test verified a corner-case scenario for engine ignition at the lower boundary of LOX inlet pressures and strong fuel inlet conditions – continuing to verify the engine's robustness ahead of its new role of powering SLS.
RS-25 in its SLS configuration has to deal with colder liquid oxygen and engine compartment temperatures, higher propellant pressure and greater exhaust nozzle heating compared to operational conditions seen during Shuttle missions.

Green-run tests of the Engine Control Units are expected to occur once per month through May, yielding three fully tested controllers; the fourth will be demonstrated during the all-up test firing of the first SLS core stage. Following completion the tests, the controllers will be removed from the test engine and Aerojet Rocketdyne will be tasked with integrating them with the SLS engines planned to be used on Exploration Mission 1.


Photo: NASA Kennedy

Per the current plan, two of the four engines to support that mission will undergo hot fire tests in July and September since they are new and were never acceptance tested under the Shuttle program. These two tests will also conclude the formal qualification testing campaign of the Engine Control Units.

Following acceptance tests of the SLS engines, development engine 0528 will return to the A-1 stand to begin a three-year test program to verify affordability changes for the re-start of RS-25 production of expendable rocket engines as opposed to the more-expensive Shuttle-era engines that were certified for use on 20 missions. These tests will verify design simplifications to reduce production cost of the new RS-25 model to be used once the Shuttle inventory has run out. Qualification testing will also raise the nominal thrust setting by another 2% to 111% and push the engines to their highest performance that can be safely achieved to give SLS the best possible payload capability.

Per the current plan, RS-25 will be fully qualified to restart engine production by the end of 2021.


Photo: Aerojet Rocketdyne

The four finished EM-1 engines will return to Stennis once attached to the EM-1 core stage that is se t for a full test firing on the B-2 test stand with all four engines running simultaneously to verify the performance of the full core ahead of the first SLS mission. The EM-1 mission remains scheduled for late 2018, but is currently under review for the possibility of flying that mission with a crew which would cause a fairly significant slip.

RS-25 is a staged combustion engine with two separate preburners that drive separate high-pressure turbopumps delivering Liquid Oxygen oxidizer and Liquid Hydrogen fuel received from independent low-pressure turbopumps to the main combustion chamber which employs regenerative cooling provided by fuel circulation through the chamber and nozzle wall. Becoming one of the most-tested and best understood pieces of rocket propulsion, the RS-25 went through a number of modifications, improvements and re-certifications over its three-decade operational life with Shuttle.

Despite being one of the most complex engines ever flown, the RS-25 maintained an impressive reliability with only one major in-flight event.

Overall, RS-25 delivers 1,860 Kilonewtons of thrust at sea level increasing to 2,279kN in vacuum (at the new standard 109% power level); the engine can actively throttle from 67% to 111 or even 115% of rated performance. The engine achieves a specific impulse of 366 seconds at sea level and 453 seconds in vacuum, operating at a chamber pressure of 206.4 bar.  RS-25 stands 4.3 meters tall and is 2.4 meters in diameter with a dry mass of 3.5 metric tons.

[свернуть]

[zandr]

http://tass.ru/kosmos/4121155

NASA провело огневое испытание двигателя RS-25, предназначенного для полетов на Марс
Космическое ведомство США не уточняет, насколько успешно прошел тест
НЬЮ-ЙОРК, 23 марта. /Корр. ТАСС Алексей Качалин/. Национальное управление США по аэронавтике и исследованию космического пространства (NASA) провело в четверг очередное огневое испытание модернизированного двигателя RS-25, предназначенного для ракет-носителей Space Launch System (SLS) и запусков кораблей Orion на Марс. Об этом сообщило NASA.
По его данным, огневое испытание прошло на полигоне космического центра NASA им. Джона Стенниса (штат Миссисипи) и длилось 6 минут 20 секунд. Космическое ведомство пока не уточняет иные подробности и насколько успешно прошел тест. На видео, размещенном на сайте NASA, каких-то аномалий во время испытаний не видно.
RS-25 модернизированы под параметры носителя SLS, который строится в расчете на подъем 105 тонн от Земли. Данные ракетные двигатели ранее устанавливались на космических кораблях многоразового использования "шаттл", эксплуатация которых была завершена в 2011 году после 135 запусков. RS-25 усовершенствованы и оснащены новым блоком управления, позволяющим осуществлять сообщение между носителем и двигателем.
Первый запуск корабля Orion с помощью SLS запланирован на конец 2018 года. Полет человека к Красной планете NASA рассчитывает осуществить примерно в середине 2030-х. До полета Orion к Марсу должны быть направлены несколько автоматических аппаратов, которые изучат поверхность и атмосферу планеты и определят место будущей посадки корабля с астронавтами. Эти планы, сформированные при президенте Бараке Обаме, могут быть скорректированы администрацией нового президента США Дональда Трампа.