SpaceX marked major progress with its Starship program in Texas after the first stage Super Heavy booster successfully splashed down in the Gulf of Mexico earlier today. Today's test was the fourth flight of the fully integrated Starship stack, and it was the first time that the booster completed its flight without any major anomalies. SpaceX plans to catch the booster with its launch tower, but before the firm can attempt this, it has to ensure that the rocket is not a threat to the tower.
SpaceX's Starship Super Heavy Booster Successfully Splashes Down In Gulf Of Mexico After Launch
SpaceX's Starship Super Heavy is the world's largest rocket booster courtesy of its 33 Raptor engines. These enable it to generate close to two million pounds of thrust, and these engines have proven tricky throughout the life of the Starship program. During the third Starship flight earlier this year, the booster nearly made it to a soft splashdown but its engines failed to ignite at the last moment. This left the rocket unable to reduce its speed, and as a result, it crashed into the ocean.
After lift off today, 32 out of the 33 Raptor engines performed nominally and shut down as expected at the point of stage separation. A set of engines then successfully re-lit for the boost back burn, which propels the rocket back to the launch site while the second stage starts its journey. The key portion of the test for the Super Heavy was the ignition of its engines for the land burn since this was the point of failure during the previous flight.
This time around, the booster's engines re lit and successfully managed to slow it down for a soft landing. SpaceX's Elon Musk confirmed a soft splashdown on X, as his firm overcame a major hurdle in the Starship program.
Super Heavy has splashed down in the Gulf of Mexico pic.twitter.com/hIY3Gkq57k
— SpaceX (@SpaceX) June 6, 2024
After this, the focus on the test shifted on the second stage Starship. The second stage provided great visuals during the last test attempt, as SpaceX was able to broadcast its atmospheric reentry in real time. Starship's reentry was also another primary test objective for today's test. Successful reentry is crucial for Starship since SpaceX plans to reuse the second stage spacecraft. This rapid re usability is at the heart of Starship's planned missions to Mars since it will enable SpaceX to significantly reduce launch costs.
Starship re entered the atmosphere close to the 45 minute mark after lift off. The ship uses thousands of heat shield tiles assembled to make a single shield, and ahead of today's test, SpaceX had deliberately removed two tiles from the ship to evaluate its re entry by placing sensors in the area. This time around, the ship's flaps were more controlled in their movement in order to make sure that it was stable for the all important flip maneuver for landing.
Peaking heating. Starship on a good entry trajectory pic.twitter.com/H0Gv6hyvt2
— SpaceX (@SpaceX) June 6, 2024
Mission controllers confirmed at close to the 48 minute mark that the ship's flaps were performing normally. Soon after this, the second stage, Starship, started to glow purple as it was completely engulfed by plasma. Following this, the ship entered the atmosphere and entered the region where it experienced the highest reentry temperatures.
Starship maintained its reentry trajectory after it cleared this region and appeared to be performing nominally seven minutes after its atmospheric reentry. At the 55 minute mark, green sparks engulfed the vehicle while mission controllers confirmed that the trajectory continued to remain normal. However, at this point, the forward flap (one on top of the rocket) caught fire and pieces continued to fly off of it. This also cracked the camera on the second stage Starship, but despite the flap damage, Starship continued to descend to Earth.
The second stage Starship also passed the region of maximum dynamic pressure, which is the point during reentry at which it experiences the greatest stress. Even though the camera lens had cracked, the ship crossed Mach 2 as it was roughly 30 kilometers above the ocean surface. Despite the fin damage, Starship started and ended its landing burn, which marked the end of today's test flight.
Ahead of the test, SpaceX had explained that the "primary objectives will be executing a landing burn and soft splashdown in the Gulf of Mexico with the Super Heavy booster, and achieving a controlled entry of Starship," and at the flight's conclusion, it appears that all these objectives were met.
About the author: Ramish is a seasoned technology writer and editor with more than a decade of experience. He specializes in semiconductor fabrication and market analysis. With a background in finance and supply chain management - via his bachelors in Finance and a micromasters in supply chain management from MIT - Ramish combines financial rigor with deep industry insight to deliver accurate and authoritative coverage.
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