SpaceX Revives Launch Operations with Booster 19 at New Pad 2 for Upcoming Starship Tests

In a significant update for the space industry, SpaceX has made a striking return to its launch site for the first time since the Flight 11 mission on October 13, 2025. This marks a notable shift as the company introduces Booster 19, a Block 3 variant, mounted on its newly constructed launch pad, known as Pad 2, after 22 months of development. The commissioning of this pad is intended to pave the way for advancements in SpaceX’s Starship program.

On March 8, Booster 19 departed from Mega Bay 1, making its way along Highway 4 to arrive at Pad 2, where it is set to undergo extensive testing over the coming days. Crews will conduct a series of essential assessments, including ambient pressure tests, propellant loading tests involving Liquid Oxygen (LOX) and Liquid Methane (LCH4), and spin prime evaluations. Ultimately, this will lead to static fire tests, potentially involving multiple iterations. These procedures are critical not only for examining the booster itself but also for verifying the functionality of the entire pad system.

Despite having previously tested various operations with the pad’s tank farm, SpaceX is embarking on this new phase with an actual booster for the first time. The presence of Booster 19 at the launch site signifies an important step in the commissioning process. Details about the number of propellant loading tests remain unclear, though SpaceX has experience from previous Starship missions, which positions them well for the task.

Tests commenced swiftly after Booster 19’s arrival, with the Booster Quick Disconnects (BQDs) connected on the night of March 8. By the early hours of March 9, it appeared that a pressure test had been completed, evidenced by venting from the main tank vents. Looking forward, the team is likely to conduct a small tanking test involving chilling the tanks and loading a limited quantity of LOX and LCH4.

Booster 19 rolled out with only 10 of its planned 33 Raptor 3 engines—intentionally spaced for specific testing purposes. This strategic layout enables engineers to evaluate the internal plumbing and gas manifolds of the new Block 3 engine design. It also facilitates the testing of the launch pad’s systems, especially the ridge cap and flame deflector components. This approach is intended to pave the way for a successful 33-engine firing, a feat that has proven challenging in the past. Previous attempts, like those with Booster 7, saw setbacks, including an explosion during a spin prime test.

As for the timing of upcoming tests, SpaceX has scheduled three days of beach closures from March 9 to 11, with potential testing windows between 8 am and 8 pm CDT. Initial days are expected to focus on pressure and loading tests, with hopes that engine testing could commence soon afterward—possibly by early next week.

Booster 19 has also undergone upgrades since its last cryoproof testing, now featuring three grid fins that are 50% larger than earlier models and mounted lower on the booster. Additionally, the new design incorporates lifting pins on opposing grid fins, a change that reflects advancements in the Block 3 configuration.

In parallel developments, SpaceX has successfully completed cryogenic proof tests on another vehicle, Ship 39. After thorough testing, which included a series of pressure and squeeze tests, Ship 39 has been returned to Mega Bay 2 for further work. While it remains to be seen if additional tests will be conducted before preparing for static fire evaluations, the progress of both Booster 19 and Ship 39 brings SpaceX closer to the anticipated Flight 12 launch. However, with additional tank tests on the horizon, the roadmap to success remains contingent on the outcomes of forthcoming assessments.