What To Know
- to successfully return the Super Heavy booster to sea in the Gulf of Mexico and to achieve a controlled reentry of the upper stage, called Starship.
- For the first time, both elements were not only successfully launched from SpaceX’s Starbase site near Brownsville, Texas, but they are also returned to Earth for controlled splashdownsLive feeds from cameras on board the rocket, relayed to the ground via SpaceX’s Starlink high-speed network, demonstrated the incredible difficulty of the maneuver, revealing purple and orange plasma surrounding the 50 meter high vehicle as it sliced through the atmosphere above the Indian Ocean at more than 20,000 km/h.
- So, instead of landing on a barge at sea or on the ground, the booster is captured in flight by these arms, which allows it to be stabilized and safely placed on the launch pad.
SpaceX has just marked a crucial milestone in the development of its Starship megarocket, the largest and most powerful rocket ever built. This fourth test flight has indeed demonstrated significant progress for the program and reinforces SpaceX’s vision for a future where reusable spaceflight will become the norm. The enthusiasm is such that SpaceX could even attempt to recover the Super heavy booster with its Mechazilla tower during the next flight.
A crucial step for Starship
At 121 meters tall, the Starship is essential for the future of SpaceX. The vehicle is also attracting the interest of NASA. The American space agency has in fact selected this ship to drop its next astronauts on the Moon as part of the Artemis program. However, before humans can climb aboard, many test flights will be necessary and this will probably not happen before the end of this decade. On the other hand, the goal of recovering and reusing the entire rocket seems within reach.
The fourth test flight had two main objectives: to successfully return the Super Heavy booster to sea in the Gulf of Mexico and to achieve a controlled reentry of the upper stage, called Starship. For the first time, both elements were not only successfully launched from SpaceX’s Starbase site near Brownsville, Texas, but they are also returned to Earth for controlled splashdownsLive feeds from cameras on board the rocket, relayed to the ground via SpaceX’s Starlink high-speed network, demonstrated the incredible difficulty of the maneuver, revealing purple and orange plasma surrounding the 50 meter high vehicle as it sliced through the atmosphere above the Indian Ocean at more than 20,000 km/h.
Holding the heat shield
SpaceX engineers were particularly interested in the performance of Starship’s heat shield. Made of some 18,000 hexagonal ceramic tilesit must in fact withstand temperatures that can reach 1,430° Celsius during reentry in order to protect Starship’s main structure made of stainless steel. However, despite apparent damage to one of the control flaps and the loss of several ceramic thermal protection tiles, the ship has managed to maintain control and land smoothly. This feat is a testament to the steel’s incredible resilience to high temperatures. SpaceX will continue to refine its metal to withstand even higher temperatures.
A wing of the spacecraft sustains damage during reentry during the vehicle’s fourth flight test on June 6, 2024. Credit: SpaceX on X
What is the next step ?
The fifth test flight could take place in just a few weeks. While the Federal Aviation Administration (FAA) ordered investigations after the first three launches, that probably won’t be the case this time. In fact, SpaceX is already testing its new rocket. During this upcoming flight, SpaceX will aim to demonstrate that Starship’s Raptor engine can reboot in spacewhich will allow the ship to place itself in low Earth orbit and guide itself safely to re-entry. Engineers could also provide heat shield modifications Starship to address the tile loss encountered during the fourth flight. Elon Musk also Express his ambition to try to bring the booster back to Starbase for an attempt to catch him with the arms of his Mechazilla tower. In detail, these mechanical arms are designed to catch the Super Heavy booster as it returns to Earth after propelling Starship into space. So, instead of landing on a barge at sea or on the ground, the booster is captured in flight by these arms, which allows it to be stabilized and safely placed on the launch pad. Here is a simulation below: By capturing the booster in this way, SpaceX hopes significantly reduce the time needed to overhaul and reuse rockets. Naturally, mid-air capture requires great precision and coordination. Mechazilla’s arms will be controlled by advanced systems that calculate the booster’s trajectory and adjust movements in real time to ensure safe and accurate capture. This system has not yet been tested in real conditions. The next flight could therefore be particularly interesting from this point of view.
