SpaceX has launched SN10 — the tenth iteration of its current prototype series of Starship, the heavy-lift reusable spacecraft it’s developing. Starship SN10 took off from Boca Chica, Texas, where SpaceX is developing the vehicle. It flew to a height of roughly 10 km, or 32,000 feet, before performing a maneuver to re-orient itself for a friction-assisted landing descent.
Unlike the last two Starship prototypes to fly this high, however, the roughly six-minute flight did not end in a fireball [UPDATE: Well, not immediately. The rocket did blow up while stationary on the landing pad a few minutes after landing, potentially due to a leak]. Instead, it completed its landing flip maneuver as intended and slowed itself for a soft touchdown, with the rocket remaining vertical and intact afterwards.
This was a fantastic outcome, and a nominal one in all regards according to SpaceX’s livestream. But why the prior explosions to get to this point? That’s partly down to the way in which it has been doing its development of this vehicle. All rocket development includes unexpected events and sub-optimal outcomes, but SpaceX has a couple of things at work that mean is efforts are subject to unusual scrutiny versus your average spaceship manufacturer.
First, it’s doing this out in the open — the Boca Chica facility is basically just a couple small buildings, some concrete pads, some storage tanks and some scaffolding. It’s extremely close to a public roadway (which is closed during testing, while the surrounding area is evacuated), and people can and do just drive up and set up cameras to film what’s going on. That’s not at all how legacy rocket makers have typically done things.
Second, SpaceX founder and CEO Elon Musk has been adamant that SpaceX pursue a development strategy of rapid iteration and prototyping with Starship’s development. That has meant it’s manufacturing and assembling Starship prototypes simultaneously, making small changes as it goes, rather than stepping back after each test and doing a prolonged, multi-month analysis before proceeding with building and flying another version.
A launch attempt earlier in the day was cut short after a brief engine fire, when instrument readings from the rocket showed a slightly high thrust value that violated what Musk termed “conservative.” The fix that SpaceX instituted was actually adjusting the limit higher in order to avoid the abort initiation.
No doubt the company will do an investigation into the cause of the explosion that followed the successful flight and landing maneuver, but the test was still successful in all the ways that matter most for SpaceX at this stage of development. Next up for Starship is likely increasing the height of these test flights. Eventually, the goal is to reach orbit, of course, but SpaceX is likely to try a few launches that remain atmospheric but far exceed this one before it attempts making that trip.
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