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In preparation for the only planned full scale static fire engine test of the core first stage of the SLS rocket, NASA engineers have successfully completed a tank test to failure on a back-up oxygen tank.
The tank was filled with water to simulate the oxygen, and cracked as expected at the predicted pressure and at the predicted weld. A short 11-second video of the moment of failure test is embedded below the fold.
This test illustrates the methods by which NASA works. Unlike SpaceX, which is doing similar tests at the very beginning of its Starship design stage to best improve their design, NASA does this testing at the very end of construction, to prove that what they have built will work. The former method in the long run is less risky and faster, as SpaceX quickly finds out what works and doesn’t and builds accordingly.
The latter method is more risky because it depends on complex computer models, which can always be wrong. It also is more expensive in that it requires NASA to build its rockets with large margins of error, just in case those models are wrong. Finally, it appears to take longer to build, because of those required large margins of error. Your rocket or spaceship needs almost to be “gold-plated” to make sure it will work, when completed, since you really can’t test it in the design phase and build it more efficiently based on those tests.
From the press release: From the moment he is handed a possibility of making the first alien contact, Saunders Maxwell decides he will do it, even if doing so takes him through hell and back.
Unfortunately, that is exactly where that journey takes him.
The vision that Zimmerman paints of vibrant human colonies on the Moon, Mars, the asteroids, and beyond, indomitably fighting the harsh lifeless environment of space to build new societies, captures perfectly the emerging space race we see today.
He also captures in Pioneer the heart of the human spirit, willing to push forward no matter the odds, no matter the cost. It is that spirit that will make the exploration of the heavens possible, forever, into the never-ending future.
Available everywhere for $3.99 (before discount) at amazon, Barnes & Noble, all ebook vendors, or direct from the ebook publisher, ebookit.
And if you buy it from ebookit you don't support the big tech companies and I get a bigger cut much sooner.