SpaceX Tuesday...
Discussion
Latest tweets indicate an issue with a control valve which led to the engine gimballing getting out of phase with the rockets movements
“Looks like Falcon landed fine, but excess lateral velocity caused it to tip over post landing,” said Elon Musk via his Twitter account (@ElonMusk) after launch. “Either not enough thrust to stabilize or a leg was damaged. Data review needed.”
“Looks like the issue was stiction in the biprop throttle valve, resulting in control system phase lag,” added Musk this evening. “Should be easy to fix.”
Still showing the legs as they were deploying
“Looks like Falcon landed fine, but excess lateral velocity caused it to tip over post landing,” said Elon Musk via his Twitter account (@ElonMusk) after launch. “Either not enough thrust to stabilize or a leg was damaged. Data review needed.”
“Looks like the issue was stiction in the biprop throttle valve, resulting in control system phase lag,” added Musk this evening. “Should be easy to fix.”
Still showing the legs as they were deploying
No, WE'RE not.
It's to do with what the people who work in the MEDIA like.
These days, the broadcast nedia is populated by ninnies who love tittle tattle and gossip and silliness.
Back in the 50s and right through to the 80s it was peopled with people who had diverse, often technical or military backgrounds - so they were genuinely interested in engineering and science. That is why there were so many programmes of that type on TV in those days.
Now, all they want to show is the light, frothy and airy fairy stuff they THINK we should like because THEY like it.
That's the bad news. The good news is that the good stuff can still be got at - through the internet. If you want to keep abreast of space shots and space technology, there's no point in waiting for mainstream TV to keep you alert as to what is happening.
Use the internet. It's all there.
It's to do with what the people who work in the MEDIA like.
These days, the broadcast nedia is populated by ninnies who love tittle tattle and gossip and silliness.
Back in the 50s and right through to the 80s it was peopled with people who had diverse, often technical or military backgrounds - so they were genuinely interested in engineering and science. That is why there were so many programmes of that type on TV in those days.
Now, all they want to show is the light, frothy and airy fairy stuff they THINK we should like because THEY like it.
That's the bad news. The good news is that the good stuff can still be got at - through the internet. If you want to keep abreast of space shots and space technology, there's no point in waiting for mainstream TV to keep you alert as to what is happening.
Use the internet. It's all there.
HiRes video of the landing on Facebook - sorry, don't have a link for the original video
https://www.facebook.com/john.t.mcbride/videos/101...
https://www.facebook.com/john.t.mcbride/videos/101...
Excellent images.
It does look to me that the rate of descent is just too high at the moment. I would think that there just isn't enough thrust from the motor to slow the descent rate down enough. They really would want the the thing to actually stop at least 50 feet above the barge and then begin a nice controlled and gentle let down onto the barge. It's all looking a bit frantic at the moment.
It does look to me that the rate of descent is just too high at the moment. I would think that there just isn't enough thrust from the motor to slow the descent rate down enough. They really would want the the thing to actually stop at least 50 feet above the barge and then begin a nice controlled and gentle let down onto the barge. It's all looking a bit frantic at the moment.
That's what I assumed. They just can't load enough fuel into the thing to have enough spare at the end of the descent to give them any hover (i.e. "sorting out" ) time. It's got to be 100% on the money 100% of the time - with no margin for error.
I still think it is always going to be a bit acey deucy even if they do manage it every so often.
I still think it is always going to be a bit acey deucy even if they do manage it every so often.
Eric Mc said:
Excellent images.
It does look to me that the rate of descent is just too high at the moment. I would think that there just isn't enough thrust from the motor to slow the descent rate down enough. They really would want the the thing to actually stop at least 50 feet above the barge and then begin a nice controlled and gentle let down onto the barge. It's all looking a bit frantic at the moment.
Rate of descent and the landing is because of engine power.It does look to me that the rate of descent is just too high at the moment. I would think that there just isn't enough thrust from the motor to slow the descent rate down enough. They really would want the the thing to actually stop at least 50 feet above the barge and then begin a nice controlled and gentle let down onto the barge. It's all looking a bit frantic at the moment.
The minimum thrust of a single engine is way above the weight of the stage 1 itself. It cant slow down and have controlled gentle let down'. it has to fire at just the right time to scrub downward momentum as it touches down
Can't see that other vid post but here's Musks link
https://twitter.com/elonmusk/status/58846319307002...
https://twitter.com/elonmusk/status/58846319307002...
RobDickinson said:
Eric Mc said:
Excellent images.
It does look to me that the rate of descent is just too high at the moment. I would think that there just isn't enough thrust from the motor to slow the descent rate down enough. They really would want the the thing to actually stop at least 50 feet above the barge and then begin a nice controlled and gentle let down onto the barge. It's all looking a bit frantic at the moment.
Rate of descent and the landing is because of engine power.It does look to me that the rate of descent is just too high at the moment. I would think that there just isn't enough thrust from the motor to slow the descent rate down enough. They really would want the the thing to actually stop at least 50 feet above the barge and then begin a nice controlled and gentle let down onto the barge. It's all looking a bit frantic at the moment.
The minimum thrust of a single engine is way above the weight of the stage 1 itself. It cant slow down and have controlled gentle let down'. it has to fire at just the right time to scrub downward momentum as it touches down
Looks like they got that bit pretty close though, zero velocity at zero altitude.
Cool stuff
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