Relativity Space

🔥 Just another day at Stennis. Stage 2 successfully completed its first integrated hotfire!

The A2 test stand was originally built in the 60s to support Saturn V Upper Stage testing (S-II). It was later reconfigured to be a single engine test stand for Shuttle Main Engine testing and development.

The last Saturn V Stage test occurred October 30, 1970 on A2. It has been 55 years, 11 months, and 17 days since A2 supported stage testing capability.

As of this morning, it is now 0 days.

Next stop: the Moon. 🚀 We’re partnering with @GoToImpulse on a lunar mission for @NASAMoonBase ! Terran R will launch Helios and lander vehicles to orbit for the first leg of the journey towards humanity’s first permanent lunar outpost.

Learn more about the mission: impulsespace.com/updates/impuls…
Learn more about NASA Moon Base: nasa.gov/news-release/n…

Building the infrastructure to launch Terran R. September brought several key milestones across LC-16's launch pad and ground systems.

✔️ The east lightning protection system tower reached its full height of 530 feet.
✔️ Structural steel on the east side of the launch table is complete.
✔️ Permanent 480-volt power infrastructure energized at the pad.

September was a big month for test operations across our sites.

📍 NASA Stennis, MS
Stage 2 completed its first wet dress rehearsal! The team put the stage through flight-like propellant loading, COPV fills, engine chill operations, and a simulated stage 1 ascent timeline, building toward its first integrated hot fire.

📍 Long Beach, CA
All 13 Aeon R engines are installed on the thrust structure and are moving through integrated gimbal testing, validating their ability to pivot precisely to steer and stabilize the vehicle during flight.

From tank integration to engine production, September builds kept the team busy.

✓ Installed the downcomer into the stage 1 flight tank
✓ All primary hardware on the stage 1 aft dome is complete, closing in on final integration
✓ Interstage drilling finished, now heading to the Tender Loving Crusher for structural testing
✓ First 2 ground station controllers stood up
✓ First welds complete for the Aeon V vacuum engine nozzle extension
✓ Flights 2 and 3 engines well into manufacturing with production ramping