Test silnika RS-25 dla rakiety SLS BY MICHAŁ MOROZ ON 18 SIERPNIA 2018
Test silnika RS-25 / NASA14 sierpnia w Stennis Space Center przeprowadzony został test silnika RS-25, który zasili centralny stopień rakiety SLS. Praca silnika trwała krócej od planowanej.
Test silnika RS-25 został przeprowadzony na stanowisku A-1 w należącym do NASA Stennis Space Center. Odpalenie miało trwać 8 minut i 20 sekund. Silnik pracował jednak tylko 5 minut i 19 sekund. NASA w oświadczeniu stwierdziła, że mimo skróconej pracy test zakończył się sukcesem, a wszystkie założenia zostały spełnione.
Konstruktor silnika Aerojet Rocketdyne podkreślił zaś, że silnik pracował bez zarzutu, a na jego skróconą pracę wpłynęła kwestia związana z ośrodkiem testowym. Sprawdzano m.in. technologie konieczne do zbudowania nowszych wersji silnika. W 2019 NASA planuje przeprowadzić jeszcze osiem kolejnych testów RS-25.
https://www.youtube.com/watch?time_continue=60&v=KFDfrqvXPQgNagranie z testu silnika RS-25 z 14 sierpnia 2018 / NASA
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https://kosmonauta.net/2018/08/test-silnika-rs-25-dla-rakiety-sls/#prettyPhotoNASA says RS-25 engine test a success despite ending earlyby Jeff Foust — August 15, 2018
(...) The test of the RS-25 engine on the A-1 stand at the Stennis Space Center in Mississippi was the first in a new series of static-fire tests of the shuttle-era engine that will be used in the core stage of the SLS. The engine, a developmental unit designated No. 0525, tested a flight controller unit that will be used on flight models of the engine as well as new manufacturing techniques intended to reduce the cost of future engines. (...)
Among the objectives of the test was to test a new manufacturing approach called hot isostatic pressing for the engine’s main combustion chamber that the company says “saves considerable time and money” over conventional techniques. “Initial test data indicates the chamber performed flawlessly during the 319-second test,” Aerojet Rocketdyne said.
That technique is being evaluated for use on future versions of the RS-25. The first four SLS missions will use existing engines, originally manufactured for the space shuttle and updated for SLS. Later SLS launches will require new RS-25 engines. (...)
https://spacenews.com/nasa-says-rs-25-engine-test-a-success-despite-ending-early/RS-25 aborts test during production restart development hot fire – still achieves objectiveswritten by Philip Sloss August 14, 2018
(...) NASA Administrator Jim Bridenstine was in attendance at Stennis for what was supposed to be a 500-second long engine test, which focused on profiling the performance of a new main combustion chamber (MCC).
Another engine controller unit (ECU) was being “acceptance tested” during this firing, set for the existing inventory of adaptation engines inherited from the Space Shuttle Program. (...)
https://www.nasaspaceflight.com/2018/08/rs-25-resumes-production-restart-development-testing/