A little more than two weeks after the last test, the RS-25 test team is ready to acceptance test the next completed engine controller unit (ECU) that will eventually fly on NASA’s Space Launch System (SLS) launch vehicle. Another flight-duration hot-fire of Development Engine 0528 (E0528) is planned Wednesday afternoon local time in the A-1 test stand at the Stennis Space Center (SSC) in Mississippi.
RS-25 Hot Fire:
Once again NASA, RS-25 prime contractor Aerojet Rocketdyne, and Stennis facilities contractor Syncom Space Services (S3) will perform the test firing with the latest modern ECU built and delivered by Honeywell to Stennis.
Following the most recent hot-fire test on July 25, the latest controller was rotated onto the test engine to begin final preparations for the test.
Each RS-25 engine has a dedicated, self-redundant controller unit that controls its operation, monitors its health, and communicates with the launch vehicle flight computers.
Honeywell is building these new, modern units at their Clearwater, Florida, facility and as each of the flight model controllers are completed they are transported to Stennis, installed on an engine in the test stand, and hot-fired in an acceptance test (or “green run”).
Philip Benefield, Systems and Requirements Team ...