What "weed need" is a space mission! - Page 56

LaurV · 2016-11-12, 02:26

Quote:

Originally Posted by Spherical Cow

Arggghh. Good article. And what if it did indeed operate for a while, but was unable to send back the data that would indicate life on Mars. Perhaps we've already found life on another planet, but just don't know it. Sort of like that last Mersenne prime that was discovered but went un-reported for months.

Norm

Good point. Let's go and see...

Dubslow · 2017-01-13, 18:13

For those of you who more passively follow SpaceX, their return to flight following the September anomaly is scheduled for 24 hours from now (subject to weather).

Looking for another successful first stage landing at sea; the second stage will also be doing 3 different burns as it deploys 10 satellites into various polar orbits. Should be a fun one, even without the Return To Flight drama.

chalsall · 2017-01-13, 19:26

Quote:

Originally Posted by Dubslow

Looking for another successful first stage landing at sea.

Indeed. In this case on "Just read the instructions" in the Pacific, rather than on "Of course I still love you" in the Atlantic.

Humour is such a subjective thing....

xilman · 2017-01-13, 21:05

Quote:

Originally Posted by chalsall

Indeed. In this case on "Just read the instructions" in the Pacific, rather than on "Of course I still love you" in the Atlantic.

Humour is such a subjective thing....

A distinct lack of gravitas is to be located in the Gulf. Or so I heard.

Dubslow · 2017-01-14, 19:56

Nailed it.

(The 3 burn second stage fact apparently wasn't.)

kladner · 2017-02-03, 02:28

https://arstechnica.com/science/2017...one-to-cracks/

Turbine blade cracks, to be exact. Interesting discussion of SpaceX and Boeing's different shortcomings, in the eyes of the US Government Accountability Office.

only_human · 2017-02-18, 03:48

SpaceX launch

Quote:

NASA > Public Feb 17, 6:11 PM

Saturday is launch day! A SpaceX Falcon 9 is being prepped to launch the company’s Dragon spacecraft into orbit carrying about 5,500 pounds of equipment and experiments to the International Space Station. Live coverage begins at 8:30 a.m. EST leading up to liftoff, which is scheduled for 10:01 a.m. Watch: http://www.nasa.gov/live

Quote:

San Diego Air & Space Museum > Public

SpaceX is hoping to launch from pad 39A in Cape Canaveral for the first time this weekend. In the meantime, watch historical launches from this launchpad! http://ow.ly/zIhG3097uWo

Quote:

Elon Musk Fan Club > Public Feb 17, 7:21 PM

Elon Musk @elonmusk
Looks like we are go for launch. Added an abort trigger at T-60 secs for pressure decay of upper stage helium spin start system.
https://twitter.com/elonmusk/status/832788691588296705

Spin start system is used to get the turbopump up to speed before the propellant valves are opened and TEA/TEB injected to ignite it.

Turbopump Start-up Sequence • r/spacex

only_human · 2017-02-18, 15:08

Launch aborted a little more than 10 seconds to go. Abort phrase "Hold Hold Hold."

Something about the 2nd stage thrust vector control.

The next launch opportunity is tomorrow.

Quote:

The Elon Musk Fan Club >Public
Elon Musk ‏@elonmusk

- All systems go, except the movement trace of an upper stage engine steering hydraulic piston was slightly odd. Standing down to investigate.
- If this is the only issue, flight would be fine, but need to make sure that it isn't symptomatic of a more significant upstream root cause
https://twitter.com/elonmusk/status/832970849791537152

http://jasc-controls.com/jasc-news/j...launch-to-iss/

kladner · 2017-02-18, 16:36

Ah well. Better an abundance of caution. Remember Challenger.

Dubslow · 2017-02-18, 17:55

Musk later tweeted that the system was green but that he personally called the abort to investigate.

kladner · 2017-02-18, 19:33

Quote:

Originally Posted by Dubslow

Musk later tweeted that the system was green but that he personally called the abort to investigate.

Finding out what was going on is much easier before any possible disaster. Small signs might point to larger faults, as Musk tweeted.

There's more than the cost of the vehicle to lose. Image and reputation are at stake, as well.

2017-02-03, 02:28	#611
kladner "Kieren" Jul 2011 In My Own Galaxy! 2·3·1,693 Posts	Congressional analysts worry SpaceX engines are prone to cracks https://arstechnica.com/science/2017...one-to-cracks/ Turbine blade cracks, to be exact. Interesting discussion of SpaceX and Boeing's different shortcomings, in the eyes of the US Government Accountability Office.

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2017-01-13, 18:13	#607
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 1110000110101₂ Posts	For those of you who more passively follow SpaceX, their return to flight following the September anomaly is scheduled for 24 hours from now (subject to weather). Looking for another successful first stage landing at sea; the second stage will also be doing 3 different burns as it deploys 10 satellites into various polar orbits. Should be a fun one, even without the Return To Flight drama.

2017-01-14, 19:56	#610
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 3·29·83 Posts	Nailed it. (The 3 burn second stage fact apparently wasn't.)

2017-02-18, 16:36	#614
kladner "Kieren" Jul 2011 In My Own Galaxy! 2·3·1,693 Posts	Ah well. Better an abundance of caution. Remember Challenger.

2017-02-18, 17:55	#615
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 3·29·83 Posts	Musk later tweeted that the system was green but that he personally called the abort to investigate.