Upgraded Sebit Rocket to Launch from Brazil
Innospace's second test flight aims to fix the propulsion and control faults behind the August failure, with launch set for Nov. 29.
Updated on Nov. 9, 2026 in Space
South Korean space startup Innospace plans to launch an upgraded Sebit suborbital rocket from the Alcantara Launch Center in Brazil on Nov. 29. The launch is a forecast for a future flight, not a completed event, and the rocket remains in development testing.
Why it matters
The planned flight is Sebit's second test after an August maiden flight that deviated from its planned trajectory and was terminated. The upgrades target propulsion and flight stability, the two areas that failed to hold on the first attempt, as commercial suborbital testing services look for proven vehicles.
The upgraded Sebit is powered by a 4-ton-class hybrid engine, up from the 3-ton class on the first vehicle, and its flight control algorithm has been redesigned. The rocket is 8.7 meters long and 0.7 meters in diameter, and the test has not yet been flown, so the thrust increase is a specification change rather than a demonstrated result.
The players
Innospace
South Korean space startup developing the single-stage Sebit suborbital rocket and its hybrid-engine propulsion.
ALADA
Brazilian state-owned aerospace company that coordinated the launch window with Innospace.
Brazilian Space Agency
Brazil's national space agency that coordinated the launch window at the Alcantara Launch Center.
The details
Sebit is a single-stage suborbital rocket built to provide commercial testing and validation services, meaning it flies short arcs above the atmosphere rather than reaching orbit. It uses a hybrid engine, which pairs a solid fuel with a liquid or gaseous oxidizer, and the upgrade raises its thrust from the 3-ton class to the 4-ton class. The company also redesigned the flight control algorithm, the software that adjusts engine and steering commands to keep the rocket on course.
Timeline
August: Sebit's maiden test flight deviated from its planned trajectory and was terminated.
Nov. 16 to Dec. 11: Innospace's 26-day launch window at the Alcantara Launch Center in Brazil.
Nov. 29: Planned launch date for the upgraded Sebit rocket.
The Tech Race
Innospace's second Sebit attempt is a commercial suborbital test, a category where a vehicle must prove repeatable flight before it can sell validation services. The company is making its next move from a failed first flight, so the November launch will show whether the propulsion and control fixes hold.
The upgrades matter most to commercial customers who would buy suborbital testing and validation flights, since a successful second flight would move Sebit closer to service. The launch date and availability for paying customers have not been announced.
The takeaway
The key signal is whether the upgraded Sebit flies cleanly on its planned November launch after the August failure. Watch for the launch outcome itself on or near Nov. 29, since it will confirm or contradict the thrust and control changes.
What happens next
The Sebit launch is scheduled for Nov. 29 within a window running Nov. 16 to Dec. 11, with the exact date to be set by weather and launch readiness.
Further reading
For more on the commercial launch sector, see the Space section.
