SpaceX Successfully Conducts Starship Spin Prime Test Towards Second Orbital Test Flight

SpaceX achieved a significant milestone in its mission to conduct the second orbital test flight of Starship by successfully completing a spin prime test. The test, which involved pumping out super cool propellants from the Super Heavy booster’s engines without ignition, was executed flawlessly. This success comes after a previous attempt resulted in a destructive explosion during flight. SpaceX’s advancements, including upgrades to the Raptor engines and a hot staging ring, are critical for the success of the upcoming launch and future missions.

The Spin Prime Test:

The recent spin prime test began at approximately 10:13 am local time, with the Starship’s Super Heavy booster venting its propellants before the actual test commenced. Lasting for about twelve seconds, the test showcased plumes of cold propellants surging from the base of the rocket. SpaceX conducted the test on multiple engines to ensure optimal performance for the upcoming second Starship orbital test flight.

Spin Prime Test

Upgrades to the Raptor Engines:

After the first flight attempt in April, SpaceX recognized the significance of upgrading the Raptor engines on the Starship vehicle. These engines represent a major improvement over the Merlin engines that power the Falcon 9 in terms of thrust, fuel efficiency, and cleaning capability. The Raptor engines use methane, leading to cleaner burns and reduced carbon buildup compared to the kerosene used in Merlin engines. This crucial maintenance advantage is vital for SpaceX’s ambitious plans, which include multiple launches to fill orbital fuel depots and undertake various missions.

Importance of the Hot Staging Ring:

One of the most crucial upgrades is the hot staging ring that SpaceX plans to add to the top of the Super Heavy booster. This component plays a pivotal role in safeguarding the top of the booster from exhaust plumes and forces generated by the second-stage engines during stage separation. This upgrade is especially significant as the second Starship test flight will involve the second-stage spacecraft’s engines firing up to separate from the booster, following the failure of SpaceX’s earlier stage separation design during the April launch.

Next Steps:

Following the successful spin prime test, the Super Heavy booster will undergo additional tests, with the static fire test being one of the most important. This test involves igniting Starship’s engines to certify the system’s readiness for launch. However, before Starship can take off, SpaceX needs to address regulatory requirements, particularly those involving the Federal Aviation Administration (FAA), to ensure all systems are set for the launch of the world’s largest rocket.


SpaceX’s recent success with the Starship spin prime test marks another significant step towards its second orbital test flight. The company’s dedication to learning from past experiences and implementing crucial upgrades, such as the Raptor engines and the hot staging ring, demonstrates its commitment to space exploration and future ambitious missions. As SpaceX moves forward with the launch preparations, the world watches eagerly to witness the next giant leap in space exploration.


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