NSF says it was a single engine static fire. So I assume on the Monday static fire one of the engines did not perform as expected.
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Monday was 6 engine from main tanks.NSF says it was a single engine static fire. So I assume on the Monday static fire one of the engines did not perform as expected.
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Today's road closure has been revoked. There will be a temporary closure at midnight tonight that I assume will be used to move Ship 29 back to the build site (the two point lifting rig has been attached to Ship 29). It would be nice if Booster 11 was moved to the launch site at the same time, but that's probably premature.I should add that tomorrow is listed as a "Possible Closure".
They install a bell stiffener that attaches to the outer wall.How do they manage nozzle flow separation of the RVacs at sea level for these? Do they not throttle up so the effect isn't as great, or the test sort enough duration that it's simply not an issue?
Ah, that's pretty straightforward and simple. Thanks @mongo.They install a bell stiffener that attaches to the outer wall.
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Interesting.They install a bell stiffener that attaches to the outer wall.
Not high speed, but here you go. There's only a hint of flow separation, which suggests to me that they just cranked the thing up to 100% throttle right away. Per the above, perhaps they can only go to 100% that because the engine is being run horizontally.It would be interesting to see some high-speed footage of the inside of the nozzle wall during thrust...
I think that since the flow is supersonic, reflections can't propagate up the exhaust stream. At stage separation, the outside of the bells get worse blowbackI wonder how much that exists to deal with the violence of flow separation, and how much it has to do with the shock of running the engine so close to the ground with such a large bell.
So after the testing it will have to be moved back to the Mega Bay to have that installed, correct?Note that it doesn't have its hot staging ring.
Probably.So after the testing it will have to be moved back to the Mega Bay to have that installed, correct?
Given the risks that SpaceX takes, I doubt that plays too much of a factor. But if they decide not to move back to the build site, I wonder how they'd stack the hot staging ring. How about using the chopsticks? To date, they've relied on a crawler crane - which isn't visible at the launch site right now.After a successful static fire, the booster or the ship should not be moved back and forth the build and the launch site. All these movements introduce risk.