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Profile Bob DeWoody
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Message 1629784 - Posted: 19 Jan 2015, 13:06:31 UTC - in response to Message 1629694.  

Why didn't anyone think about consumption of the gas before?

And if the levels were too low, why wasn't the landing aborted?
:/

And do what? It had to come down.
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Message 1629810 - Posted: 19 Jan 2015, 14:11:01 UTC

When you abort, you don't put it on the platform! Why would you distroy the platform also? :/


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Message 1629841 - Posted: 19 Jan 2015, 15:51:40 UTC

According to the SpaceX web site the platform suffered only minor damage. I don't know whether there was enough left of the 1st stage booster after the crash to study but if they had crashed it into the ocean recovery would have been very expensive.
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Message 1629907 - Posted: 19 Jan 2015, 18:21:35 UTC

They probably underestimated consumption, and didn't realise that until it was too late to do anything else.

One thing, it certainly shows that their target shooting is well up to the mark,
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Message 1630032 - Posted: 19 Jan 2015, 22:21:12 UTC

Google is maybe going to sponsor Space X, hooray!
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Message 1630053 - Posted: 19 Jan 2015, 23:32:41 UTC - in response to Message 1629694.  

Why didn't anyone think about consumption of the gas before?

And if the levels were too low, why wasn't the landing aborted?
:/

They obviously thought about how much hydraulic fluid to use when they put it in there. Just underestimated how much they needed. Musk tweeted that it's an open system. I'd assume they can't run out if it's closed, but he tweeted that the open system weighed less and they really have to get the weight down.

All the maneuvers are autonomous. There's a communications blackout just before landing, because all the relays are beyond the horizon, even the survey ship that recovers the platform. No one can abort it just before landing.
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Message 1630070 - Posted: 20 Jan 2015, 0:44:29 UTC - in response to Message 1630053.  

Musk tweeted that it's an open system. I'd assume they can't run out if it's closed, but he tweeted that the open system weighed less and they really have to get the weight down.

I can see that, a closed system would need a pump (weight) maybe an APU (turbine to drive the pump, more weight) and titanium tubes (more weight) probably running all the way up the stage unless they put the APU at the top which would be weird and bad mass-distribution-wise. I'm not sure why they don't need a pump driven by the compressed medium they have unless they are actually spitting the hydraulic fluid overboard which would be a mess unless they route the drain all the way back down the stage to the exhaust area. Interesting!

Maybe it's not actually a hydraulic system, it's pneumatic where they use their compressed gas to drive the paddle actuators directly and he was speaking allegorically when he said hydraulic fluid.

Also, I wonder if the reason the paddles work at low speed is because they shift mass around. They can't weigh much, but controlling a rocket is like balancing a pencil on its tip, it doesn't need much.
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Message 1630088 - Posted: 20 Jan 2015, 2:17:05 UTC - in response to Message 1630070.  
Last modified: 20 Jan 2015, 2:17:21 UTC

Musk tweeted that it's an open system. I'd assume they can't run out if it's closed, but he tweeted that the open system weighed less and they really have to get the weight down.

I can see that, a closed system would need a pump (weight) maybe an APU (turbine to drive the pump, more weight) and titanium tubes (more weight) probably running all the way up the stage unless they put the APU at the top which would be weird and bad mass-distribution-wise. I'm not sure why they don't need a pump driven by the compressed medium they have unless they are actually spitting the hydraulic fluid overboard which would be a mess unless they route the drain all the way back down the stage to the exhaust area. Interesting!

Maybe it's not actually a hydraulic system, it's pneumatic where they use their compressed gas to drive the paddle actuators directly and he was speaking allegorically when he said hydraulic fluid.

Also, I wonder if the reason the paddles work at low speed is because they shift mass around. They can't weigh much, but controlling a rocket is like balancing a pencil on its tip, it doesn't need much.

It is a hydraulic, the fluid is RP1, which they just dump into the fuel tank to burn.
http://space.stackexchange.com/questions/7771/why-does-the-falcon-9-consume-hydraulic-fluid
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Message 1630097 - Posted: 20 Jan 2015, 2:41:53 UTC - in response to Message 1630088.  

StackExchange has a Space Exploration area? Well, there goes my free time.
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Message 1630490 - Posted: 21 Jan 2015, 6:45:16 UTC - in response to Message 1630032.  

Google is maybe going to sponsor Space X, hooray!

Looks like it was officially announced yesterday. Fidelity Investments and Google are in a $1 billion investment (10% of company ownership)into SpaceX. I'm not sure if it's 50/50 or some other ratio. Also not sure what Fidelity's goals are, but Google's interest seems to be Musk's idea to launch a network of satellites to provide low cost or maybe even free Internet to developing countries. Part of this mission is also to gain experience on satellite communications, because he plans to develop technology to provide satellites for Mars bases/cities as well. SpaceX is going to start a satellite technology division in the Seattle, WA area real soon. <100 employees at first, then up to 1000 within several years.
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Message 1630502 - Posted: 21 Jan 2015, 6:58:07 UTC

I've sort of heard about Elon Musk, SpaceX, Tesla, etc for a while now in the general or business news. But recently with the news about finally trying to land a rocket, I've been reading and watching stuff about him and what he's trying to do. It seems almost unbelievable that there's this one guy who appears to be genuinely pursuing global warming, transition to sustainable energy (which is necessary even if no such thing as global warming), and space exploration, for almost a completely altruistic stance. What he's doing, how many things he's doing at the same time, and how successful he's been so far is crazy. I've come to the opinion that he's perhaps one of the most valuable human beings in the world, in terms of preserving or improving the future.
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Message 1630510 - Posted: 21 Jan 2015, 7:21:44 UTC - in response to Message 1630490.  

Google is maybe going to sponsor Space X, hooray!

Looks like it was officially announced yesterday. Fidelity Investments and Google are in a $1 billion investment (10% of company ownership)into SpaceX. I'm not sure if it's 50/50 or some other ratio. Also not sure what Fidelity's goals are, but Google's interest seems to be Musk's idea to launch a network of satellites to provide low cost or maybe even free Internet to developing countries. Part of this mission is also to gain experience on satellite communications, because he plans to develop technology to provide satellites for Mars bases/cities as well. SpaceX is going to start a satellite technology division in the Seattle, WA area real soon. <100 employees at first, then up to 1000 within several years.


WOOHOO!!!

http://techcrunch.com/2015/01/20/spacex-raises-1-billion-in-new-funding-from-google-and-fidelity/?ncid=rss&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29&utm_content=FaceBook
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Message 1630614 - Posted: 21 Jan 2015, 14:42:24 UTC - in response to Message 1630510.  

Google is maybe going to sponsor Space X, hooray!

Looks like it was officially announced yesterday. Fidelity Investments and Google are in a $1 billion investment (10% of company ownership)into SpaceX. I'm not sure if it's 50/50 or some other ratio. Also not sure what Fidelity's goals are, but Google's interest seems to be Musk's idea to launch a network of satellites to provide low cost or maybe even free Internet to developing countries. Part of this mission is also to gain experience on satellite communications, because he plans to develop technology to provide satellites for Mars bases/cities as well. SpaceX is going to start a satellite technology division in the Seattle, WA area real soon. <100 employees at first, then up to 1000 within several years.


WOOHOO!!!

http://techcrunch.com/2015/01/20/spacex-raises-1-billion-in-new-funding-from-google-and-fidelity/?ncid=rss&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29&utm_content=FaceBook

I wouldn't WOOHOO too much. If every data packet you send or receive passes through Google, you can be assured Google will find a way to inspect them and monetize them, and spam the hell out of you with them.
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Message 1630621 - Posted: 21 Jan 2015, 14:51:12 UTC

I have been using Google Chrome instead of Internet Explorer for the last year or so and have not noticed any increase in spamming. As a matter of fact my gmail account filters out almost all attempts at spamming my account.

If these companies are willing to support SpaceX I'm glad to see it. I still have concerns that SpaceX has cut a few too many corners on their way into the space business.
Bob DeWoody

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Message 1630643 - Posted: 21 Jan 2015, 15:49:34 UTC

Elon Musk is not afraid of risks, both on cars and on rockets. Maybe he was needed to go back to the pioneering spirit of early space.
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Message 1631416 - Posted: 22 Jan 2015, 21:56:42 UTC - in response to Message 1630614.  

Google is maybe going to sponsor Space X, hooray!

Looks like it was officially announced yesterday. Fidelity Investments and Google are in a $1 billion investment (10% of company ownership)into SpaceX. I'm not sure if it's 50/50 or some other ratio. Also not sure what Fidelity's goals are, but Google's interest seems to be Musk's idea to launch a network of satellites to provide low cost or maybe even free Internet to developing countries. Part of this mission is also to gain experience on satellite communications, because he plans to develop technology to provide satellites for Mars bases/cities as well. SpaceX is going to start a satellite technology division in the Seattle, WA area real soon. <100 employees at first, then up to 1000 within several years.


WOOHOO!!!

http://techcrunch.com/2015/01/20/spacex-raises-1-billion-in-new-funding-from-google-and-fidelity/?ncid=rss&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29&utm_content=FaceBook

I wouldn't WOOHOO too much. If every data packet you send or receive passes through Google, you can be assured Google will find a way to inspect them and monetize them, and spam the hell out of you with them.

grmpf, I wouldn't be too sure of that Gary.
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Message 1631429 - Posted: 22 Jan 2015, 22:24:59 UTC - in response to Message 1631420.  

Oh I would. Google is anti the good of the human race to make a fast buck. I see no evidence to the contrary so far.


Opinion notified.
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Message 1631534 - Posted: 23 Jan 2015, 6:34:41 UTC
Last modified: 23 Jan 2015, 6:35:27 UTC

This is an article from De Tijd, a very respected magazine here in Belgium:

http://www.tijd.be/detail.art?a=9591043&n=7764&ckc=1

The cooperation has been confirmed by Space X.
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Message 1665130 - Posted: 13 Apr 2015, 21:13:28 UTC

There was another attempt at a launch today that would have involved another try at landing on a floating platform by the first stage booster. Unfortunately at T-minus 4 minutes the launch was scrubbed because of an approaching thunderstorm.
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Message 1665277 - Posted: 14 Apr 2015, 5:40:45 UTC

lets keep our fingers crossed tomorrow... ;)


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Message boards : Science (non-SETI) : Space X


 
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