RAPTOR 3

On December 3, 2025, SpaceX posted a video of validation testing of a Raptor 3 engine performing an ascent burn.

SpaceX's Raptor 3 testing follows an iterative development cycle where each test provides immediately usable data for subsequent design.

The Raptor 3 engine represents a significant evolution over previous versions due to improvements in the full-flow staged combustion cycle design, enabling greater efficiency and better thrust-to-weight ratio.

The Raptor 3 tests are aimed at validating the performance required for the new generation vehicle, which must ensure reliability in high mechanical and thermal stress scenarios.

The Raptor 3 test program is designed to verify critical parameters such as combustion chamber pressure, fuel cycle efficiency, thermal stability, and response to different thrust configurations.

The capability of the Raptor 3 to execute rapid ramp-up and throttling is crucial for vector control and management of aerodynamic forces during the first minutes of flight.

The goal of the Raptor 3 tests is to replicate the operational conditions faced by the three central engines of Starship during the initial moments of flight.

Multiple versions of the Raptor 3 validation test will address different conditions experienced by Starship’s three inner engines during its initial climb to space.

Validation testing is being conducted on a Raptor 3 engine performing a Starship V3 ascent burn.

The Super Heavy tested in this session is a different version, Version 3, which is designed to be 1.5 meters longer than Version 2 and powered by the improved Raptor 3 engines.

The propulsion system of V3 has been extensively revamped to accommodate the new Raptor 3 engine.

SpaceX plans to upgrade to Version 3 of Starship, which will feature Raptor 3 engines and the ability to carry over 100 tons into orbit.