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Mission thread: SpaceX Dragon SPX-2 to ISS


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#16 OP DocM

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Posted 07 March 2013 - 06:04

SpX engineer

@Molliway : After extensive calculation, SpaceX engineers have concluded that the Grapple Bar extraction target is smaller than a womp-rat.


Trunk cargo (grapple adapters for ISS's heat radiators) grappled, extracted and installed. First use of Dragon's unpressurized cargo trunk successful! This is the "standard" version of the trunk - the "extended" trunk is almost twice as long.

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#17 IsItPluggedIn

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Posted 07 March 2013 - 23:52

So what are "grapple adapters for ISS's heat radiators", and what do they do?

#18 OP DocM

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Posted 08 March 2013 - 05:20

The heart radiators dump waste heat from the station into space.

As it is there is no way for the Canadarm to grab them for removal for repair, replacement or disposal. These adapters attach to the radiators and allow the Canadarm to grab on. If you look at the pic of the adapters youl'll see posts sticking out. Canadarm latches onto these posts using a 3-wire snare.

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#19 IsItPluggedIn

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Posted 08 March 2013 - 05:35

Thats pretty cool, Thanks for the info Doc

#20 OP DocM

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Posted 08 March 2013 - 05:59

No prob.

BTW: there are other critical bits manifested for Dragon, including new docking adapters for commercial and NASA manned spacecraft (including DragonRider) and the testbed version of the VASIMR** electric rocket engine.

** VASIMR = variable specific impulse magnetoplasma rocket.

#21 OP DocM

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Posted 26 March 2013 - 12:12

End of Mission day!!

Dragon was bookin' on the way outta there!! (In regular time, not the speed-up in parts of this video)

Deorbit burn ~11:42 AM Eastern.



#22 Geoffrey B.

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Posted 26 March 2013 - 12:23

sweet, yet another successful supply mission, way to go dragon.

#23 OP DocM

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Posted 26 March 2013 - 12:58

It'll be successful once it's recovered.

Splashdown should about 12:36 PM Eastern.

They have 3 ships plus small high speed boats with dive teams deployed. After recovery it goes to the Port of Los Angeles, then it gets trucked to McGregor, Texas for cargo removal.

Speculation: these seem to be more recovery assets than usual. It could be practice for the attempted water soft landing of Falcon 9 v1.1's first stage in June - the first attempt to use techs developed in the Grasshopper program.

#24 OP DocM

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Posted 26 March 2013 - 19:42

Perfect 10 min deorbit burn, guidance thrusters working as expected.

Update:

SPLASHDOWN! At 9:34am PT, #Dragon splashed down safely in the Pacific. Welcome home!


They had the recovery ships around in a 3 nautical mile corcle & put it downin the middle.

#25 Geoffrey B.

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Posted 26 March 2013 - 19:45

i love how accurate they can project where it will land #science

#26 ShareShiz

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Posted 26 March 2013 - 19:50

Ahh you said splashdown at ~noon eastern, and then it goes to TPoLA.

Then splashdown in the pacific.

For a minute I thought it was going to splashdown on the east coast and then trucked over to LA.

I could have probably seen it re-enter if I had known. :p

#27 OP DocM

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Posted 26 March 2013 - 19:56

It's no guess - Dragon steers itself on the way down using its Draco thrusters and GPS guidance. Once the SuperDraco landing thrusters are installed in the DragonRider crew version they plan on putting it down with propulsion instead of 'chutes and with helipad accuracy. Just like a 1950's sci-fi movie :)

From SpaceX:

Many thanks on behalf of SpaceX for the congratulations on this interesting yet successful mission. All hands on deck for the F9v1.1 salvo.


The "F9v1.1 salvo" refers to having 3 flights in just 6 weeks in late June to thd end of July.

#28 OP DocM

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Posted 30 March 2013 - 10:00

Unloading at the Port of Los Angeles

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