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mars – How had been persistence’s cables “gash” after touching down?
persistence’s umbilical information cable and bridles had been gash by exploding bolts. This is the equivalent system that Curiosity used.
Exploding bolts are very generally utilized in house missions. This is for a number of causes. First, the fasteners should breathe tremendous sufficient to carry the items collectively all through the entire vibrations and movement a spacecraft should endure because it launches. There should breathe completely no random of them separating, in any other case captious parts might burst. However, they have to too breathe in a position to launch at exactly the capable time, and really snappily at that.
An exploding bolt is extraordinarily unostentatious, and has a really low random of failure. Since NASA has been utilizing these for many years, they know the best way to make use of them very effectively. And NASA likes utilizing know-how they already know the best way to make use of. Could they maintain made a lookout for mechanism to correctly disconnect the cables? Probably. But the extra sophisticated the mechanism, the extra probably it’s to fail. And it isn’t affection they’re going to make use of these cables later.
This video does a really wonderful job of explaining how explosive bolts (Hold Down Release Mechanisms) labor on spacecraft (although it isn’t the one I bethink seeing).
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