SpaceX’s Upcoming Starship Test Flight

SpaceX is poised to conduct a highly anticipated test flight of its significantly upgraded Starship next week, which has the potential to become the tallest and most powerful rocket in history. This flight is crucial for NASA’s ambitious plans to return humans to the Moon by 2028.

The Starship system consists of two main components: an upper stage, also referred to as the Starship, and a lower stage known as the Super Heavy. Since the last test back in October, SpaceX has implemented several substantial modifications to both stages.

The upcoming test flight scheduled for May 19th will feature new iterations of both the Starship and Super Heavy, including three distinct models. Each stage is powered by the enhanced version 3 Raptor engines, which have been tested only sparingly in previous launches. The stakes are higher this time, as the launch will occur from a newly designed pad at SpaceX’s Starbase facility in Texas.

In the configuration of Super Heavy 3, the number of grid fins has been reduced from four to three, but their size has been increased by 50% to ensure precise atmospheric maneuverability. Starship 3 incorporates larger propellant tanks, an advanced on-orbit refueling capability, and enhanced heat-resistant tiles designed for atmospheric reentry.

At launch, the rocket will reach a total height of 124 meters, surpassing the previous version 2 by about one meter. This height also exceeds that of NASA’s 98-meter Space Launch System (SLS) rocket and the 111-meter-tall Saturn V, the historic rocket that transported astronauts to the Moon during the 1960s and ’70s.

Starship 3 is engineered to produce a staggering thrust of 75,000 kilonewtons, nearly double that of the SLS’s 39,000 kilonewtons, making it the most powerful rocket to date.

Research from the University of Sheffield, conducted by Alistair John, indicates that the collective power output of all engines combined in the Starship stack at maximum capacity exceeds the total electricity generation of Germany. “It’s enormous,” John remarked.

SpaceX CEO Elon Musk has outlined plans for the Starship to transport satellites into orbit, as well as serve beyond Earth with missions to Mars. Moreover, NASA selected it as one of two commercial lander designs for the Artemis program, aiming for a human return to the Moon, alongside the Blue Origin lander backed by Jeff Bezos.

After the successful unmanned Artemis 1 mission in 2022, the recent Artemis flight saw four astronauts venture further from Earth than any humans before, orbiting around the Moon.

A recent NASA document confirmed details of the Artemis III mission, which will send a crew into low Earth orbit aboard the Orion spacecraft atop an SLS rocket. They will then rendezvous with one or both commercial lunar landers offered by SpaceX and Blue Origin. This critical maneuver is necessary for transferring crew and fuel to the lander in preparation for a lunar landing mission targeted for Artemis IV as early as 2028.

SpaceX employs a rapid iteration and learning strategy, typical of Silicon Valley, distinct from the more cautious approach usually adopted in space exploration. Out of 11 test flights conducted thus far, six have succeeded while five have encountered failures. Neither SpaceX nor NASA has commented on these outcomes.

Dr. Peter Shaw from Kingston University believes SpaceX remains aligned with its Artemis timelines despite earlier setbacks. “Rocket science is inherently complex and difficult,” remarks Shaw. “Can they succeed? Absolutely. Will they meet their deadlines? There is confidence in their ability; even if they face more failures, they will learn, adapt, and innovate.”

The forthcoming Starship test is vital for confirming the integrity of the Version 3 design, which will underpin SpaceX’s Human Landing System (HLS) essential for Moon landings. The HLS will require significant adaptations, including a different engine tailored for the Moon’s lower gravity and will forgo the heat shield since it will not need to handle Earth reentry.

“While this represents a small, incremental improvement, it is also the most significant iteration. Version 3 is what we require for the Artemis program; its predecessors were merely prototypes,” explains John. “Version 3 is effectively the inaugural test of the production model. Our goal is reliability.”