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Space & Spaceflight

Starship V3’s Heat Shield Was the Real Star of Flight 12

Despite some hiccups, the first flight of Starship V3 was an overall success, and the rocket's heat shield certainly exceeded expectations.
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The biggest and most powerful rocket ever built launched from Starbase, Texas, on Friday. After back-to-back delays and a last-minute scrub on Thursday, it was exhilarating to see Starship V3 finally embark on its maiden voyage. But for this spaceflight reporter, the highlight of Flight 12 was seeing the state of the heat shield as Starship returned to Earth.

According to Chris Hadfield, a retired Canadian Air Force colonel, test pilot, and astronaut, Starship V3’s upper stage endured temperatures reaching 2,600 degrees Fahrenheit (1,450 degrees Celsius) during atmospheric reentry. Video and images taken as Ship performed the flip maneuver and landing burn revealed minimal damage to the heat shield—a stark difference from previous flights of Starship V2.

What SpaceX did differently this time

As Starship V3 reentered Earth’s atmosphere, SpaceX gathered critical data on its heat shield performance. Because Ship was intentionally destroyed upon splashdown in the Indian Ocean, the company will rely on this data to evaluate the heat shield’s performance over the coming weeks. But based on the vehicle’s appearance during its reentry and landing burn, it did pretty darn well.

Starship flights 10 and 11, which launched a previous version of the rocket, caused extensive discoloration and damage to the upper stage’s heat shield. This time, Starship V3 returned to Earth in Ship shape (pun intended), with the shield appearing remarkably more uniform and intact. This suggests better tile retention and more even thermal protection across the surface of the vehicle.

One of the most significant differences between Starship V3 and its predecessor, Starship V2, is the heat shield tile array, according to New Space Tracker. For this rocket, SpaceX used a new tile geometry and improved tile attachment clips that the company developed after analyzing heat shield performance data from V2 flights. Its ultimate goal is to make Starship fully reusable and reduce turnaround time between flights as much as possible, so ensuring the heat shield can survive multiple reentries is critical.

SpaceX also upgraded the Super Heavy booster’s heat shield, but a multi-engine failure during the boostback burn ignition caused it to make a hard splashdown in the Gulf of Mexico, so spectators did not get a good look at how the shield held up. Of course, SpaceX’s main priority will now be identifying and addressing the cause of this critical engine failure before Flight 13.

Still, perfecting Starship’s heat shield performance is critical to achieving rapid reusability. What’s more, SpaceX and NASA plan to use a new version of the rocket for crewed missions to the Moon and eventually Mars, so ensuring that it can survive the extreme temperatures of reentry will be key to its human-spaceflight certification. While there are likely more improvements to be made, the shield’s performance during Flight 12 is certainly encouraging.

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