Terran R March 2026 Program Update

Relativity Space
Relativity SpaceApr 13, 2026

Why It Matters

Achieving these hardware and infrastructure milestones positions Terran R to commence its first flight and scale launch cadence, directly challenging incumbent providers and expanding access to affordable, high‑performance space launch services.

Key Takeaways

  • Released 2,207 flight parts, focusing on stage‑one shipping assembly.
  • Completed mechanical assembly of second‑stage fuel and LOX tanks.
  • New friction‑stir welders boost simultaneous stage build capacity.
  • Aeon R first‑stage engines undergoing acceptance testing at Stennis.
  • Launch pad infrastructure at LC‑16 advancing with strongback and LNG tanks.

Summary

Terran R’s March 2026 program update highlighted steady progress across design, build, test, and launch domains as the company moves toward its inaugural flight. The team released 2,207 flight parts, advanced the stage‑one shipping assembly, and completed mechanical integration of the second‑stage fuel and LOX tanks, including the LOX lid, thrust cone, and headband that links payload to the vehicle. New hardware‑in‑the‑loop avionics boxes are ready, enabling software testing ahead of integration, while the stage‑one downcomer has been welded and entered acceptance testing.

Manufacturing capacity is scaling rapidly: a second circumferential friction‑stir welder and an online horizontal welder now allow simultaneous stage builds, and additional CNC machines and powder‑bed printers are coming online. Aeon R first‑stage engines are undergoing acceptance testing at NASA Stennis, with approved units shipped back to Long Beach for integration, and Aeon V second‑stage engines completed a 526.5‑second endurance demonstration.

On the ground, LC‑16 launch‑pad infrastructure is progressing, with the transporter‑erector strongback outfitted, rails installed, a 180‑foot water tower erected, and two 246,000‑gallon LNG tanks positioned to supply densified propellant. The roof structure at the test hangar is complete, and the live‑ring lift on the A2 stage test stand is installed, supporting upcoming propulsion tests.

These milestones tighten the schedule for Terran R’s first orbital launch, bolster its production line for higher launch cadence, and signal the company’s readiness to compete in the burgeoning commercial launch market.

Original Description

Key highlights:
✓ Stage 2 tank mechanical assembly complete, including LOX lid, thrust cone, and headband installation
✓ Stage 1 downcomer fully welded and began acceptance testing
✓ Aeon R flight engines manufactured, assembled, and shipped as acceptance testing continues
✓ LC-16 infrastructure advancing, including rail install, LNG tanks delivered, and water tower rising
📌 Chapters
0:00 – 0:13 Introduction
0:13 – 0:24Design Overview
0:25 – 2:06 Build Overview
2:07 – 2:49 Test Overview
2:50 – 3:28 Launch Overview
3:29 –3:44 Closing Recap
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