What upgrades did Innospace make to the Sebit rocket before its second test flight?

Innospace increased the hybrid engine’s thrust from the 3-ton class to the 4-ton class and redesigned the flight control algorithm. The company said the technical upgrades were aimed at improving propulsion and flight stability.

When and where is Innospace scheduled to launch Sebit in Brazil?

The planned launch date is Nov. 29 at the Alcantara Launch Center in Brazil. Innospace has a 26-day launch window from Nov. 16 to Dec. 11, and the final date and time may change depending on weather, launch readiness and other operational factors.

What happened during Sebit’s first test flight in August?

Sebit deviated from its planned trajectory during its maiden test flight, so the test was terminated. The upcoming flight will be the rocket’s second test launch.

Innospace to launch upgraded suborbital rocket in Brazil on Nov. 29

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Summary

Innospace plans to launch its upgraded Sebit suborbital rocket in Brazil on Nov. 29, following an unsuccessful maiden test flight in August. The launch window runs from Nov. 16 to Dec. 11 at the Alcantara Launch Center. The second test flight will assess upgrades to the rocket’s propulsion and flight stability.

Key Facts

The launch window was secured in coordination with state-owned aerospace company ALADA, the Brazilian Air Force and the Brazilian Space Agency.
Sebit is a single-stage rocket designed to provide commercial testing and validation services, measuring 8.7 meters long and 0.7 meters in diameter.
The rocket is powered by a 4-ton-class hybrid engine, upgraded from the 3-ton-class engine used before the improvements.
In August, Sebit deviated from its planned trajectory, prompting the termination of its maiden test flight.
The upgrades also include a redesigned flight control algorithm, and the final launch date and time will depend on weather, launch readiness and other operational factors.

By Yonhap

Published Nov 9, 2026 9:26 am KST

Innospace's upgraded multipurpose suborbital rocket, Sebit / Courtesy of Innospace

Korean space startup Innospace said Monday it plans to launch its upgraded multipurpose suborbital rocket, Sebit, in Brazil on Nov. 29, following an unsuccessful maiden test flight in August.

The company has secured a 26-day launch window from Nov. 16 to Dec. 11 at the Alcantara Launch Center in Brazil, in coordination with state-owned aerospace company ALADA, the Brazilian Air Force and the Brazilian Space Agency.

The final launch date and time will be determined based on weather conditions, launch readiness and other operational factors.

Sebit is a multipurpose suborbital rocket designed to provide commercial testing and validation services. The single-stage rocket is powered by a 4-ton-class hybrid engine and measures 8.7 meters in length and 0.7 meters in diameter.

The upcoming flight will mark Sebit's second test launch following a series of technical upgrades aimed at improving its propulsion and flight stability.

The improvements include increasing engine thrust from the 3-ton class to the 4-ton class and redesigning the flight control algorithm.

The upgrades follow an unsuccessful maiden flight in August, when the rocket deviated from its planned trajectory, prompting the termination of the test.

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