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Author Topic: SpaceX (general discussion)  (Read 200904 times)

Offline Michel Van

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Re: SpaceX (general discussion)
« Reply #1335 on: December 05, 2018, 11:09:42 am »
There was a good video on Everyday Astronaut showing hand held camera imagery of the booster spinning and bobbing.  One of the grid fins was apparently stuck at 45 degrees and causing the roll.  The flight controls was able to get down to the landing burn and then the booster settled slowly behind some trees and presumably into the water.

Any chance of a link?  There doesn't appear to be anything there on it now.  ???

Coming soon on Youtube...
« Last Edit: December 05, 2018, 11:15:34 am by Michel Van »
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Offline sferrin

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Re: SpaceX (general discussion)
« Reply #1336 on: December 05, 2018, 11:21:05 am »
Whoops.  I was under the impression that it was still upright.  Guess that answers the reuse question.  Was it a Block V?
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Offline Michel Van

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Re: SpaceX (general discussion)
« Reply #1337 on: December 05, 2018, 11:39:33 am »
Block 5 - Unit B1050.1

not first time
F9 FT - Unit B1032.2 made a ocean landing intact, on January 31, 2018


Let's hope B1050.1 is in same conditions
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Offline Michel Van

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Re: SpaceX (general discussion)
« Reply #1338 on: December 05, 2018, 12:37:35 pm »
musk just publish the landing footage on Twitter follow on youtube
https://twitter.com/elonmusk/status/1070399755526656000



i think that's goes into History as "The Day SpaceX went Kerbal..."
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Offline Moose

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Re: SpaceX (general discussion)
« Reply #1339 on: December 05, 2018, 12:46:10 pm »
Pretty impressive how close it came to a passable landing despite the fins being jammed and resulting in a pretty significant rotation.

Online TomcatViP

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Re: SpaceX (general discussion)
« Reply #1340 on: December 05, 2018, 01:20:17 pm »
It would be also interesting to see how one deficiency in a single yaw ctrl surface could result in an unbalanced attitude despite the aerodynamic balance prior the reduction in speed and then during the boosted recovery phase. It might be that a greater level of redundancy could be suitable (bigger paddle, more powerful yaw thruster). 

But at the end it's still mission accomplished for SpaceX.


Regarding then the Dragon vehicle, it seems that they found an outgassing problem during the docking phase on the ISS:

Quote
When the next three Dragons docked at the Space Station, over the following months, SAGE experienced unexplained spikes in contamination. Something on these Dragons was outgassing—releasing molecules beyond the expected, and perhaps the acceptable, levels. And those molecules were sticking to SAGE.
Outgassing, in earthly terms, is what makes a new car smell like a new car. “There are volatile chemicals in those new materials that migrate through the material to the surface," says Alan Tribble, author of Fundamentals of Contamination Control. You’re smelling escaped seat ingredients, in other words.

Source:
https://www.wired.com/story/a-spacex-delivery-capsule-may-be-contaminating-the-iss/


 

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1341 on: December 05, 2018, 11:35:00 pm »
SpaceX Falcon 9 boosts Dragon cargo ship to orbit, first stage misses landing target

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But the landing system is designed with the safety of personnel and ground facilities in mind. The rocket’s guidance system initially targets an off-shore “impact point” and only moves the target on shore to the landing pad during a final rocket firing and only after verifying all systems are operating properly.

During Wednesday’s landing, the flight computer recognized the grid fin problem and never moved the impact point ashore during the final engine firing.

“The important point here is we have a safety function on board that makes sure the vehicle does not go on land until everything is OK, and that worked perfectly,” Hans Koenisgman, SpacerX vice president of build and flight reliability, told reporters. “The vehicle kept well away from anything where it could pose even the slightest risk to population or property.

“Public safety was well protected here,” he added. “As much as we are disappointed in this landing, or landing in the water, it shows the system overall knows how to recover from certain malfunctions.”

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1342 on: December 06, 2018, 08:27:22 am »
https://twitter.com/julia_bergeron/status/1070702026814877697

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Hawk and our wayward booster. The line is currrently attached around the leg and anchored to a hold down point. #SpaceX #SpaceXFleet @elonmusk

Offline Michel Van

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Re: SpaceX (general discussion)
« Reply #1343 on: December 06, 2018, 11:49:55 pm »
current state of salvage operation 

Warning Bad audio best watch silent
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Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1344 on: December 07, 2018, 01:55:06 pm »
NASA and SpaceX still aiming for January commercial crew test flight

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While a SpaceX commercial crew test flight might not launch on a date in early January previously announced NASA, both agency and company officials are optimistic the mission will still fly later in the month.

Offline Michel Van

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Re: SpaceX (general discussion)
« Reply #1345 on: December 08, 2018, 12:09:35 pm »


in the mean time Unit B1050.1 is pulled into Harbor of Cap
Biggest problem the Interstage section and  Holder is to damage
but Space X manage to pull stage out water




Source Youtube and NasaSpaceFlightForum
« Last Edit: December 08, 2018, 12:12:03 pm by Michel Van »
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Online TomcatViP

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Re: SpaceX (general discussion)
« Reply #1346 on: December 08, 2018, 12:27:14 pm »
Did they remove one of the leg to lift it on the cradle or was that broken during the landing?

Offline Tuna

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Re: SpaceX (general discussion)
« Reply #1347 on: December 08, 2018, 07:33:35 pm »
Quote from: Musk's twitter
Quote from: Everyday Astronaut
their new Starship and Super Heavy will be all carbon composite (mostly)
The new design is metal
Fairly heavy metal, but extremely strong

Wouldn't have guessed that one. Shiny stainless steel retrofuture is go?

Offline totoro

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Re: SpaceX (general discussion)
« Reply #1348 on: Today at 02:50:21 am »
Watched the live launch today. Seemed like the first stage made a water landing. First it started to spin a lot (don't know if that's normal) and then they just stopped broadcasting the feed from that camera. Then someone mentioned the water landing.

would that be the second water landing in a row now?
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