Watching a Rocket Plug Explode Is Very Satisfying

NASA fits foam plugs inside of booster rockets to protect the innards ahead of ignition. And boy, they sure do put on a show, when they’re blown out with 9.2 million pounds of thrust.


This video, taken on June 28 at Orbital ATK’s test facilities in Promontory, Utah, shows a test of NASA’s new booster, the Space Launch System. Once this beast of a rocket is ready for prime time it’ll take us to Mars and beyond. At full throttle, it exerts 9.2 million pounds of thrust, which is more than 34 times the total thrust of a 747 jet.

To prevent heat, dust, and moisture from getting inside a booster before it ignites, engineers install a foam plug at the nozzle. It’s designed to fall apart during ignition, and NASA scientists want to know how their latest, more denser, foam design is working out.


During this successful two-minute test of the SLS, temperatures reached nearly 6,000 degrees Fahrenheit. Following the test, some bits of foam were found as far as 1,500 to 2,000 feet away from the nozzle. The smoky ring that you see coming off the booster is condensed water vapor generated by the pressure difference between the motor gas and normal air.

Should all go well, NASA plans to send an uncrewed flight of the SLS with the Orion spacecraft some time in 2018. We can’t wait.

George is a senior staff reporter at Gizmodo.

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I... I'm sorry, George. Is there no editing process? Do these articles have to get shot directly onto the page within seconds of your deadline? How long could it possibly take to edit less than a page of copy?

"... more denser"? REALLY?

Look, everybody makes typos, but this is publishing for which people are being paid. If it can't at least be close to grammatically correct, what are you doing to any kids who read this stuff?

If someone does edit your stuff before it goes up... fire them, or give them something else to do. If not, bloody hell, why not?