Starship Booster 20 Holds 33 Engines for 24 Seconds - Flight 13 Window Opens
SpaceX fired all 33 Raptors on Super Heavy Booster 20 for a record 24 seconds on July 10, 2026. Flight 13 is eyed between July 15 and 21.
On the morning of July 10, 2026, at Starbase, all 33 Raptor engines on Super Heavy Booster 20 lit at once and stayed lit for 24 seconds.
That is not a launch. It is harder, in some ways, than looking dramatic on camera. A static fire has to prove the booster can take the full stack of thrust while bolted to the pad - no liftoff, no escape, just heat, vibration and a clock that keeps running.
SpaceX says this was a record duration for a full 33-engine burn on the pad. Ignition came at 9:55 am CDT. The methane reclaim vent had started a couple of hours earlier. By afternoon the internet had the plume photos. By evening, the more interesting question was the calendar.
Why 24 seconds matters
A short burp tells you engines light. A long hold tells you the vehicle and the pad can live with the load.
Booster 20 is only the second Block 3 booster. Getting a full-duration static fire done this cleanly is SpaceX saying the hardware is not the bottleneck anymore. Next jobs are boring and necessary: strip data harnesses from the test, fit flight hardware, look the engines over again, stack Ship 40 once it leaves Mega Bay 2.
| Checkpoint | Status |
|---|---|
| Booster 20 full 33-engine static fire | Done - 24 sec |
| Ship 40 | Final work in Mega Bay 2 |
| Likely next pad test | Tanking or wet dress |
| Target window | July 15-21, 2026 |
| Soft gate | FAA mishap file on Flight 12 / safety exemption |
The window, and the catch
Marine notices, airspace closures and hazard warnings already sketch a launch window opening as soon as July 15. That is aggressive. It is also provisional.
Before Starship flies again, the FAA still has to close the Flight 12 mishap investigation or grant an exemption. Hardware can be ready on Tuesday and paperwork can still push the stack into the week of July 20. Anyone who has watched Starbase knows both timelines are real until one of them wins.
What Flight 13 is actually testing
Not a slogan. A sequence: light 33, clear the tower, survive max-Q, stage, and bring the lessons home without inventing a new failure mode. After a year of iterative flights, the public story has become almost routine. The engineering story has not. Each booster is still a prototype wearing serial numbers.
If Booster 20 and Ship 40 stack cleanly, and if the agency clears the path, Starbase gets another attempt at making the extraordinary look almost expected.
24 seconds on the pad do not put a rocket in orbit. They do tell you the next attempt is no longer theoretical.