detonate
The term is “R.U.D.” - Rapid Unscheduled Disassembly.
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vexikron@lemmy.zip 5 months ago
Mhm, knows more about manufacturing than anyone alive on Earth.
I guess it’ll be fun/sad to watch StarShip 3 either detonate on the launch pad or before it passes the Karman Line.
chahk@beehaw.org 5 months ago
vexikron@lemmy.zip 5 months ago
Detonate is actually more precise, implying an explosion that accelerates at or faster than the speed of sound, often causing a visible blast wave in air that is humid and dense enough as the pressure wave compresses the air and squeezes it into visible semi cloud like formations momentarily.
RUD is a general term that can cover any number of events which cause a craft to generally lose structural integrity in a small amount of time.
For example, a craft could hit max q either at a non optimal angle, or due to structural integrity flaws, more or less violently tear itself apart.
Or, a craft could enter the atmosphere at a non optimal angle, or at too extreme a velocity, and be ripped apart, again, violently and quickly. This is generally referred to as ‘Burning Up’.
Or a craft could have a parachute or landing system related problem and impact the ground at such speeds it disassembles itself. Jokingly referred to as ‘lithobraking’.
Or, a craft could have an accidental triggering of some kind of abort system that results in the craft tearing itself apart.
While many of these more specific chaina of events have more specific terms to describe them… they are /all/ Rapid Unplanned Disassemblies.
All that that term means is for some reason your craft went from being more or less one piece to more or less a large number of pieces very quickly.
FaceDeer@kbin.social 5 months ago
Starship's ITF-2 launch already got well above the Karman line.
vexikron@lemmy.zip 5 months ago
Well, the booster exploded below the Karman line (i think), and the orbiter blew up above the Karman line.
My prediction for 3 is that again at least part of the craft will blow up below the Karman line.
The full static test fires they recently did damaged the craft because the test stand wasn’t designed for that level of the amount of force they’re currently testing with it, and because for some baffling reason they are not using a flame trench or proper diversion channels.
My guess is that, combined with the defects and flaws seen from the first two launches, these full power static fire tests will have damaged the craft more than they are able to repair properly in time to follow Musk’s recklessly fast launch timetable, and the whole thing will blow up or have significant trajectory problems from multiple non catastrophic engine failures before the hot staging, and/or when the booster tries to do the belly flop maneuver, the fuel tank(s) or lines will rupture as happened last time, and if the abort system engages properly it’ll then basically fall to the ground, or if it doesn’t, it’ll detonate spectacularly in midair again.
FaceDeer@kbin.social 5 months ago
The booster was never intended to go above the Karman line. Calling that a "failure" is ludicrous.
Also, the orbiter was destroyed by its flight termination package triggering, which is the very definition of an intentional action. The reason it triggered was apparently an oxygen leak that led to the upper stage running out of oxidizer just a few seconds short of achieving orbit, which wasn't according to the flight plan, but this was a test flight so the plan was always "see what happens and fix whatever problems come to light" so that's still not exactly a failure. They got farther than they did on IFT-1.
You are perhaps more used to the NASA way of "testing", which is to exhaustively perfect the rocket before it ever launches and then expect everything to go smoothly during a single shakedown flight before payloads start going up with flight #2. That's not how SpaceX does things.
My prediction for 3 is that again at least part of the craft will blow up below the Karman line.
Given that the booster is never going to cross the Karman line (booster separation happens at 64km), and that the intention is to deliberately ditch the booster in the ocean rather than recover it, you've got quite a conservative prediction there. I honestly can't think of any possible way that this wouldn't happen.
MrSpArkle@lemmy.ca 5 months ago
Rockets are harder than cars, so hopefully this means Elon is too stupid to contribute anything but haughty goals while the actual engineers make sure we don’t blow up any astronauts.