An aerial photo shows the B-1/B-2 Test Stand (foreground), A-2 Test Stand (middle) and A-1 Test Stand (back). The historic stands have been used to test engines used on every manned Apollo and space shuttle mission.

An aerial photo shows the B-1/B-2 Test Stand (foreground), A-2 Test Stand (middle) and A-1 Test Stand (back). The historic stands have been used to test engines used on every manned Apollo and space shuttle mission.

In addition to the historic A-2 Test Stand (foreground) and A-1 Test Stand (back right), construction of a new A-3 Test Stand (back left) is under way at Stennis Space Center. The new stand will allow operators to test next-generation rocket engines at simulated altitudes of 100,000 feet. Such testing is critical for engines that will carry humans into deep space once more.

A photo taken from the top of the new A-3 Test Stand at Stennis Space Center offers a panoramic view of the A, B and E test complexes at the south Mississippi facility.

NASA and contractor representatives working with NASA’s Rocket Propulsion Test Program Office stand at the base of the Thad Cochran Test Stand during a tour of the test complex on Aug. 15 at NASA’s Stennis Space Center near Bay St. Louis, Mississippi. The program office hosted a Risk Workshop and Program Management Review meeting at NASA Stennis on Aug. 13-15. The representatives are from NASA Stennis; NASA’s Neil Armstrong Test Facility in Sandusky, Ohio; NASA’s Michoud Assembly Facility in New Orleans; NASA’s Marshall Space Flight Center in Huntsville, Alabama; NASA’s Wallops Flight Facility in Virginia; and NASA Headquarters in Washington. NASA Stennis is preparing the Thad Cochran Test Stand (B-2) to test the exploration upper stage, which will fly on future SLS (Space Launch System) missions as NASA continues its mission of exploring the secrets of the universe for the benefit of all. The upper stage is being built at NASA Michoud as a more powerful second stage to send the Orion spacecraft to deep space. It is expected to fly on the Artemis IV mission. Before that, it will be installed on the test stand at NASA Stennis to undergo a series of Green Run tests of its integrated systems to demonstrate it is ready to fly.

Legislative staff and interns from the office of U.S. Rep. Garrett Graves of Louisiana are pictured at the Fred Haise Test Stand at NASA Stennis on July 11. During the visit to the south Mississippi site, the group learned more about internship opportunities with NASA and NASA Stennis. In addition to touring the test complex where RS-25 engines are tested for future Artemis missions, the group visited the Aerojet Rocketdyne Engine Assembly Facility onsite. Aerojet Rocketdyne, an L3Harris Technologies company, manufactures RS-25 engines to help power NASA’s SLS (Space Launch System) rocket on Artemis missions to the Moon and beyond.

Heide Fulton, U.S. Ambassador to the Oriental Republic of Uruguay, visits NASA Stennis on Oct. 8 to meet with site leadership and tour test complex facilities. During her visit, Fulton met with NASA Stennis Director John Bailey and other leaders of the center and the NASA Shared Services Center located onsite. She also toured the rocket propulsion test complex, visiting the B-2 side of the Thad Cochran Test Stand, where she was briefed by B-2 Stand Director Ryan Roberts about NASA Stennis testing for the SLS (Space Launch System) rocket and NASA’s Artemis missions to the Moon and beyond. Uruguay is one of 45 nations who have signed the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations. The country became the 36th nation to sign the Artemis Accords during a Washington, D.C. ceremony in February. Ambassador Fulton was joined on the visit by Cmdr. Brendan Rok, chief of the U.S. Navy Office of Defense Cooperation at the U.S. Embassy in Montevideo, Uruguay; and Leah Thorstenson, foreign policy advisor with the U.S. Marines Corps. Forces South.

Heide Fulton, U.S. Ambassador to the Oriental Republic of Uruguay, visits NASA Stennis on Oct. 8 to meet with site leadership and tour test complex facilities. During her visit, Fulton met with NASA Stennis Director John Bailey and other leaders of the center and the NASA Shared Services Center located onsite. She also toured the rocket propulsion test complex, visiting the B-2 side of the Thad Cochran Test Stand, where she was briefed by B-2 Stand Director Ryan Roberts about NASA Stennis testing for the SLS (Space Launch System) rocket and NASA’s Artemis missions to the Moon and beyond. Uruguay is one of 45 nations who have signed the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations. The country became the 36th nation to sign the Artemis Accords during a Washington, D.C. ceremony in February. Ambassador Fulton was joined on the visit by Cmdr. Brendan Rok, chief of the U.S. Navy Office of Defense Cooperation at the U.S. Embassy in Montevideo, Uruguay; and Leah Thorstenson, foreign policy advisor with the U.S. Marines Corps. Forces South.

Heide Fulton, U.S. Ambassador to the Oriental Republic of Uruguay, visits NASA Stennis on Oct. 8 to meet with site leadership and tour test complex facilities. During her visit, Fulton met with NASA Stennis Director John Bailey and other leaders of the center and the NASA Shared Services Center located onsite. She also toured the rocket propulsion test complex, visiting the B-2 side of the Thad Cochran Test Stand, where she was briefed by B-2 Stand Director Ryan Roberts about NASA Stennis testing for the SLS (Space Launch System) rocket and NASA’s Artemis missions to the Moon and beyond. Uruguay is one of 45 nations who have signed the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations. The country became the 36th nation to sign the Artemis Accords during a Washington, D.C. ceremony in February. Ambassador Fulton was joined on the visit by Cmdr. Brendan Rok, chief of the U.S. Navy Office of Defense Cooperation at the U.S. Embassy in Montevideo, Uruguay; and Leah Thorstenson, foreign policy advisor with the U.S. Marines Corps. Forces South.

Tests begun at Stennis Space Center's E Complex Sept. 13 evaluated a liquid oxygen lead for engine start performance, part of the A-3 Test Facility Subscale Diffuser Risk Mitigation Project at SSC's E-3 Test Facility. Phase 1 of the subscale diffuser project, completed Sept. 24, was a series of 18 hot-fire tests using a 1,000-pound liquid oxygen and gaseous hydrogen thruster to verify maximum duration and repeatability for steam generation supporting the A-3 Test Stand project. The thruster is a stand-in for NASA's developing J-2X engine, to validate a 6 percent scale version of A-3's exhaust diffuser. Testing the J-2X at altitude conditions requires an enormous diffuser. Engineers will generate nearly 4,600 pounds per second of steam to reduce pressure inside A-3's test cell to simulate altitude conditions. A-3's exhaust diffuser has to be able to withstand regulated pressure, temperatures and the safe discharge of the steam produced during those tests. Before the real thing is built, engineers hope to work out any issues on the miniature version. Phase 2 testing is scheduled to begin this month.