Starship Flight 12 progress update: Ship 39 advances through preflight objectives
Momentum toward Flight 12 remains centered at Massey’s Starbase test site, where Ship 39 has cleared several cryoloading goals. This testing follows Booster 19’s recent proofing at Massey’s, paving the way for a major milestone: booster rollout and Static Fire testing on Pad 2.
After its rollout from Megabay 2, Ship 39 was immediately moved into the static-fire testing area—the same pad now featuring a newly added truss structure.
That truss, installed during Massey’s latest upgrades, is designed to apply loads to the ship’s forward and aft flaps and its payload bay. The goal is to simulate the stresses a Starship would encounter during a tower catch by the Super Heavy booster.
The choice of testing stand has sparked discussion. The dedicated cryo-proof stand—which uses hydraulic rams to push up against the ship’s aft section while tanks are pressurized—remains occupied, reportedly by a previous test article.
Full cryogenic proof testing, the crucial verification that the vehicle’s tanks and welds can withstand flight-like pressures without leaks or bursts, can be conducted on the static-fire stand. The new thrust-sim stand, meanwhile, is not yet ready.
SpaceX may need to relocate the ship again later, or they could opt to skip straight to engine installation and static-fire testing, accepting a calculated risk after thorough ground analyses.
Right-hand view: the ship is already deep into cryo loading ops. pic.twitter.com/73PFh9JTmE
— NSF – NASASpaceflight.com (@NASASpaceflight) March 1, 2026
Such caution is understandable. Massey’s test complex is still recovering from the dramatic anomaly involving Ship 36 late last year, which triggered a full rebuild of ground infrastructure and test procedures. The new truss, upgraded tank farm, and reinforced pad hardware are all part of these safety improvements following the incident.
Now, every new ship must prove not only its own structural integrity but also that the supporting ground systems can safely accommodate the next generation of Starships.
Despite the stand mismatch, testing has progressed rapidly.
An ambient-pressure test occurred on February 27, followed by a full cryogenic load on February 28 that extended into the early hours of March 1. A second testing run occurred the next evening. The brisk move from arrival to propellant loading suggests SpaceX engineers are confident in the vehicle’s build quality and are pushing forward aggressively with the limited facilities at hand.
Starship Flight 12 is slated for April, setting the stage for higher launch cadence as the program aims to demonstrate in-orbit refueling—an capability that depends on Block 3’s enhanced propellant capacity and docking hardware.
Block 3 Design Overhaul: More Propellant, Smarter Structures
Ship 39’s rollout offers the clearest view yet of Block 3’s external and internal changes. While the overall dimensions stay the same as Block 2, engineers have refined the internal tank architecture in meaningful ways.
The common dome (the shared bulkhead between LOX and LNG) and the aft dome were redesigned. The common dome was lowered, increasing the ship’s liquid methane storage. To preserve the required oxygen-to-methane ratio for combustion, the aft dome was also lowered, boosting LOX capacity.
Coupled with recessed mounts for the vacuum-optimized Raptor engines, these changes add roughly 100 metric tons of usable propellant, representing a significant performance boost for longer missions.
The engines themselves mark another breakthrough. Ship 39 will be among the first to fly with Raptor 3 engines—three sea-level Raptors and three vacuum Raptors in the familiar 3+3 configuration that has guided early tests, with plans to move to nine engines on the next iteration.
Are new records boring yet?
Earlier today we saw R3.122 and R3.123 leave the testing area!
Rhin0 @SpaceRhin0 shows the updates: pic.twitter.com/F080NxOuyC
Raptor 3 is dramatically simpler than its predecessors, featuring fewer parts, no heavy heat-shield blankets around each engine, and significantly higher thrust. Cooling runs entirely through internal channels that circulate cryogenic propellant through the combustion chamber, throat, and nozzle bell.
Thermal Protection and Docking Hardware Take Center Stage
Another visible evolution is in the thermal protection system. Ship 39’s heat shield appears nearly complete—much more polished than Block 2’s patchwork, which often flew with missing tiles for instrumentation. Only a few tiles remain off on the forward flaps, likely to accommodate load sensors during Massey’s truss tests. The gap will be filled before launch.
SpaceX has largely phased out adhesive tile attachment in favor of mechanical pins. An automated pin-installation station inside the Starfactory enables faster, more repeatable production. Glue is still used at the nose-cone tip for now, but a transition to pins is expected.
The ship’s Starlink antenna array has moved from below the payload bay to the nose cone, improving signal coverage during re-entry. Additional reaction-control-system (RCS) thrusters provide greater maneuvering authority in orbit. The external raceway that routes plumbing and cabling has been redesigned for better protection and serviceability.
Most critically for future refueling operations, Ship 39 features a redesigned quick-disconnect plate that splits the LCH4 and LOX sides on the ship’s side. Docking hardware is clearly visible, ready for the first in-orbit propellant-transfer demonstrations.
Reinforcements and extra vent outlets around the SQD area, plus new vents beneath nose-cone tiles reminiscent of Space Shuttle RCS placements, complete the updated external architecture.
Gone is the era of bespoke lift points. Ship 39 uses newly designed catch points—the same hard points that will one day allow the tower’s “chopstick” arms to catch the returning Starship in mid-air.
What’s next
The focus now shifts to truss-load tests and eventual static fires. Whether SpaceX completes a full cryo-proof campaign on the proper stand or moves straight to engine installation remains an open question.
If Ship 39 passes the remaining ground tests, it could return briefly to the production site for Raptor 3 installation before stacking with a Block 3 Super Heavy booster.
Flight 12 would aim to demonstrate not only a safe ascent and re-entry but also the early steps toward orbital refueling—a cornerstone of the broader Starship mission portfolio.
Lead image: Ceaser G for NSF/L2
