Author Topic: RS-25 testing at Stennis for SLS - UPDATES  (Read 154976 times)

Online Conexion Espacial

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #420 on: 02/08/2022 11:23 pm »

NASA Conducts Second RS-25 Engine Test of Year at Stennis Space Center


NASA conducted its second RS-25 engine hot fire test of the new year Feb. 8 on the Fred Haise Test Stand at Stennis Space Center near Bay St. Louis, Mississippi. The test was the third hot fire in the latest test series that began in mid-December. NASA is testing RS-25 engines to help power the agency's Space Launch System (SLS) rocket on future deep-space missions. Four RS-25 engines will generate a combined 2 million pounds of thrust to power SLS’s ascent. Each test in the current series is providing valuable operational data to NASA's lead contractor, Aerojet Rocketdyne, on a variety of new components manufactured with state-of-the-art fabrication techniques as the company begins production of new RS-25 engines. The RS-25 engines for the first four SLS flights are upgraded space shuttle main engines and have completed certification testing. NASA will use the data from the current test series to enhance production of new RS-25 engines and components for use on subsequent SLS missions. The testing is part of NASA's and Aerojet Rocketdyne's effort to use advanced manufacturing methods to significantly reduce the cost and time needed to build new engines. For the Feb. 3 test, engineers fired the RS-25 developmental engine for a full duration of about eight-and-a-half minutes (500 seconds), the same amount of time the engines must operate to help send SLS to space. Operators also fired the engine up to 111% of its original power level, the same level needed during SLS launch. SLS will be the world's most powerful rocket and the only one capable of sending the agency’s Orion spacecraft, astronauts, and supplies to the Moon in a single mission. Initial SLS missions will send Orion to the Moon as part of NASA's Artemis program, including the Artemis I uncrewed test flight this year that will pave the way for future flights with astronauts to explore the lunar surface and prepare for missions to Mars. Artemis missions also will land the first woman and first person of color on the lunar surface. SLS and Orion, along with the commercial human landing system and the Gateway outpost in orbit around the Moon, are NASA’s backbone for deep space exploration. RS-25 tests at Stennis are conducted by a combined team of NASA, Aerojet Rocketdyne, and Syncom Space Services operators. Syncom Space Services is the prime contractor for Stennis facilities and operations.
I publish information in Spanish about space and rockets.
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Online Conexion Espacial

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #422 on: 03/02/2022 03:41 pm »
NASA Powers Up RS-25 Engine Testing for Deep Space Launches

NASA powered up its third RS-25 engine hot fire test of the new year Feb. 24, on the Fred Haise Test Stand at Stennis Space Center near Bay St. Louis, Mississippi. Operators fired the engine past recent testing at the 111% power level up to 113% for a period of time. NASA is testing RS-25 engines to help power the agency's Space Launch System (SLS) rocket on future deep space missions. Initial SLS missions will send the agency’s Orion spacecraft to the Moon as part of NASA's Artemis program. Work is underway inside the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida to prepare the first SLS for the upcoming launch of the uncrewed Artemis I mission, which will pave the way for future flights with astronauts to explore the lunar surface and prepare for missions to Mars. Artemis missions will land the first woman and first person of color on the lunar surface. SLS will be the world's most powerful rocket and the only one capable of sending the Orion, astronauts, and supplies to the Moon in a single mission. Four RS-25 engines, firing simultaneously, will generate a combined 2 million pounds of thrust to help power SLS's ascent. The RS-25 engines for the first four SLS flights are upgraded space shuttle main engines and have completed certification testing. RS-25 engines for subsequent missions will fire at 111% of their original power level to help launch SLS. Testing at 113% power level at Stennis demonstrates a margin of safety for operating the engine at the higher thrust. Each engine test in the current series at Stennis provides valuable operational data to NASA's lead contractor, Aerojet Rocketdyne, on new components manufactured with state-of-the-art fabrication techniques as the company begins production on new RS-25 engines. The testing is part of NASA and Aerojet Rocketdyne's effort to use advanced manufacturing methods, significantly reducing the cost and time needed to build new engines. For NASA's Feb. 24 test, engineers fired the RS-25 developmental engine for a full duration of about eight-and-a-half minutes (500 seconds), the same amount of time the engines must operate to help send SLS to space. SLS, Orion, commercial human landing systems, and Gateway outpost in orbit around the Moon are NASA's backbone for deep space exploration. RS-25 tests at Stennis are conducted by a combined team of NASA, Aerojet Rocketdyne, and Syncom Space Services operators. Syncom Space Services is the prime contractor for Stennis facilities and operations.
« Last Edit: 03/02/2022 03:41 pm by Conexion Espacial »
I publish information in Spanish about space and rockets.
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Online Conexion Espacial

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Online Conexion Espacial

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #424 on: 03/30/2022 09:15 pm »

NASA, Aerojet Rocketdyne Complete Testing for Modernized RS-25 Engine

NASA completed developmental engine testing March 30 with a full-duration RS-25 hot fire, to support future engines that will launch Space Launch System (SLS) astronauts deeper into space than ever.


Operators fired RS-25 engine No. 0525 for about eight-and-a-half minutes (500 seconds) and up to 111% power level on the Fred Haise Test Stand at NASA’s Stennis Space Center near Bay St. Louis, Mississippi. The March 30 hot fire completed the fourth developmental test series and sets Aerojet Rocketdyne, lead contractor for NASA’s SLS engines, on pace to produce new RS-25s for future use.


“We’ve conducted a total of 25 tests during this remarkable development test program to modernize manufacturing, on-ramp additive manufacturing, and reduce cost of the RS-25 engines for the Space Launch System,” said Johnny Heflin, manager for the SLS Liquid Engines Office at NASA’s Marshall Space Flight Center in Huntsville, Alabama. “These tests are helping us ensure the success of not only the upcoming flight of Artemis I but also of future missions that will lead to long-term exploration of the Moon.


NASA is building SLS to return humans, including the first woman and the first person of color, to the Moon as part of Artemis and to power future missions to Mars. Four RS-25 engines will help launch SLS missions. The first four missions, including the upcoming uncrewed Artemis I flight test to the Moon, will use modified space shuttle main engines, all of which have been tested for flight.


For future SLS missions beyond the first four, Aerojet Rocketdyne is modernizing production of new RS-25 engines, while also reducing costs by 30 percent. The new engines will include components manufactured with state-of-the-art fabrication techniques, such as additive manufacturing or 3D printing. These new components have been tested during the developmental series completed at Stennis today.

“As we modernize the engines, we need to ensure that they are as robust and as reliable as the original space shuttle engines,” said Jeff Zotti, Aerojet Rocketdyne RS-25 program director. “We ran the new components under the same conditions and profiles they will see during flight to ensure the engines perform as they should. This was the last step before we combine all the new, more affordable components and existing heritage components into our design certification engine.”


This latest test series concludes a thorough testing campaign for NASA and its engine contractor. The agency conducted an initial series of 18 RS-25 hot fires as Aerojet Rocketdyne completed modifications to adapt the existing space shuttle main engines needed for early SLS missions. This included tests of two RS-25 flight engines.


Four test series, using a pair of RS-25 developmental engines, followed the initial adaptation hot fires:


- The first series included four hot fire tests of RS-25 engine No. 0528 for a total of 1,390 seconds. Operators fired the engine at 111% of the original space shuttle main engine power level, the same level new RS-25 engines will need to help launch SLS. They also reached the 113% power level for the first time during the series, demonstrating a margin of operational safety. The series included tests of three new engine controllers, which work as the RS-25 “brain” to help the engine communicate with the SLS rocket, as well as a 3D-printed pogo accumulator assembly. Aerojet Rocketdyne also demonstrated use of a new ablative material designed to help protect RS-25 nozzles.


- A second series featured nine successful hot fires of engine No. 0525 for a total of 4,016 seconds. Operators fired the engine at 113% power level for a total of 628 seconds during the series. The series featured tests of nine new engine controllers and several new engine components, including a main combustion chamber fabricated using a hot isostatic pressure bonding technique. The series also demonstrated various new engine operation procedures.


- The third developmental series included seven hot fires of RS-25 engine No. 0528 for a cumulative 3,650 seconds. The series continued testing of new engine components and featured a pair of gimbal tests. Gimbaling involves pointing the engine nozzle in the direction needed to steer the rocket during flight.


- The latest series involved five hot fire tests of RS-25 developmental engine No. 0525 for a total of 2,500 seconds. The series featured a new low-pressure fuel turbopump, flex ducts, restart sensors and ignition components, as well as 3D-printed valves and rigid ducts not previously tested. Fifty percent of the new 3D-printed components to be used on the new RS-25 engines were tested in the series. Other 3D-printed components are located on the new engine nozzle and will be validated during certification testing later this summer.
“This latest hot fire closes a great chapter in Stennis testing history,” said Chip Ellis, Stennis RS-25 test project manager. “Completion of the retrofit series could not have occurred without the dedicated, highly skilled workforce at Stennis Space Center. The test team has done an outstanding job getting us through this development period, and we look forward to continuing to test engines that will fly on SLS missions.” 


With developmental testing completed, NASA plans to begin a series of 12 hot fires this summer on an RS-25 certification engine that is the identical design to future engines being manufactured for flight. It will feature all of the new components, including a new nozzle, in final flight configuration. A follow-up series of 12 tests will be conducted on RS-25 engine No. 0525, once it is modified with new components in final flight configuration as well. The dual series will demonstrate the new engine design is ready to fly.


Aerojet Rocketdyne is under contract to produce 24 new RS-25 engines using the updated design to support future Artemis missions beginning with Artemis V.


RS-25 tests at Stennis are conducted by a combined team of NASA, Aerojet Rocketdyne, and Syncom Space Services operators. Syncom Space Services is the prime contractor for Stennis facilities and operations.
« Last Edit: 03/30/2022 09:20 pm by Conexion Espacial »
I publish information in Spanish about space and rockets.
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Online Conexion Espacial

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #425 on: 04/01/2022 04:29 pm »

Although NASA will not provide full coverage of the Wet Dress Rehearsal, a live webcast of the test will be available, it will not have coverage or sound.
I publish information in Spanish about space and rockets.
https://twitter.com/conexionspacial

 

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