Test SRB dla rakiety SLS BY REDAKCJA ON 6 WRZEŚNIA 2020
(...) Test rakiety Solid Rocket Booster (SRB) odbył się 2 września 2020 o godzinie 21:05 CEST. To próbne odpalenie rakiety nastąpiło na poligonie Promontory w stanie Utah. Test trwał 122 sekundy i przebiegł prawidłowo. Jest to ważny etap w przygotowaniach do pierwszej misji rakiety SLS o oznaczeniu Artemis-1. (...)
Autorem artykułu jest Mikołaj Data – serdecznie dziękujemy!https://kosmonauta.net/2020/09/test-srb-dla-rakiety-sls/NASA and Northrop Grumman test SLS boosterby Jeff Foust — September 2, 2020
The Flight Support Booster 1 performs a static-fire test at a Northrop Grumman test site in Utah Sept. 2 to test new technologies and procedures intended for later SLS launches. Credit: NASA(...) The test was designed to evaluate potential changes that would be incorporated into future boosters for missions after the third SLS flight, Artemis 3 in 2024. That included a modification in the production of the booster’s propellant caused by a change in suppliers.
“The initial purpose was to address a supplier obsolescence issue with the aluminum powder,” said Charlie Precourt, vice president of propulsion systems at Northrop Grumman. “Making sure that process delivered the exact specification of the aluminum powder, which is a key ingredient of the propellant, was a big deal.” (...)
https://spacenews.com/nasa-and-northrop-grumman-test-sls-booster/SLS booster test-fired in UtahSeptember 2, 2020 Stephen Clark
An SLS flight support booster was test-fired Wednesday in Utah. Credit: NASA/Northrop Grumman/Scott Mohrman(...) The rocket motor consumes the aluminum powder in combination with ammonium perchlorate. The two chemicals are mixed in epoxy resin, which cures with a rigidness of a pencil eraser and remains stable until the rocket is ignited, Precourt said.
Engineers also tested new materials in the rocket motor’s nozzle during Wednesday’s hotfire test.
The boosters for the first three SLS missions are either built or in production, and NASA and Northrop Grumman have booster sections left over from the space shuttle program for eight SLS flights. The booster segments were reused during the shuttle program, but will be discarded after each SLS mission.
Some of the rocket motor’s design changes tested Wednesday could be introduced beginning with the ninth SLS flight, officials said. (...)
https://spaceflightnow.com/2020/09/02/sls-fsb-1-hotfire-test/FSB-1 Test Fire Completed for Future SLS Artemis Deep-Space MissionsBy Ben Evans, on September 2nd, 2020
Photo Credit: NASA(...) Key focuses included the validation of all ballistic parameters, the ignition sequence interval, pressure and thrust build-up rates and performance tolerances and limits. Additionally, FSB-1 facilitated an all-up demonstration of the Solid Rocket Motor (SRM) nozzle forward exit cone housing and measured its load response to the sound suppression water deluge system during the ignition sequence.
But a core aim was to evaluate new solid fuel ingredients, which, like the shuttle-era SRBs, consist of powdery Ammonium Perchlorate Composite Propellant (APCP).
“The aluminum powder manufacturer moved its facility, bringing the need to obtain from a new supplier, which was the initial purpose of FSB-1,” Ms. Anderson explained. “Once the test was established, more objectives were added. FSB-1 will qualify various propellant ingredients for both supplier obsolescence issues and to have multiple qualified resources. Propellant ingredients are the same as shuttle and were modified slightly to meet the performance requirements for the longer rocket motor and new vehicle.”
Following the completion of Artemis-1 late next year, the next SRB motor ground test at Promontory—known as FSB-2—is presently targeted for 2022, ahead of the launch of Artemis-2, currently slated to be the first mission with humans to voyage beyond low-Earth orbit since Apollo 17. As for the FSB-1 casing, its future remains unclear at present. “It will be disassembled and analyzed for data post-test,” Ms. Anderson told us. “The cases may or may not be used again, depending on what is needed. It will likely not be “recreated” as a motor or booster with the same exact cases.”
Five-segment SRBs with modified nozzles were considered during the shuttle program, as a means of improving safety, payload-to-orbit performance and reducing system costs. In particular, it was expected to eliminate the shuttle’s hairy Return to Launch Site (RTLS) and Transoceanic Abort Landing (TAL) abort modes and provide greater capacity for an Abort Once Around (AOA) in the event of a Space Shuttle Main Engine (SSME) failure shortly after liftoff. (...)
https://www.americaspace.com/2020/09/02/fsb-1-test-fire-completed-for-future-sls-artemis-deep-space-missions/https://www.nasa.gov/exploration/systems/sls/nasa-conducts-sls-booster-test-for-future-artemis-missions.htmlhttps://www.nasaspaceflight.com/2020/09/nasa-northrop-grumman-first-flight-support-booster/