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SpaceX thread


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#1 Psycix

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Posted 13 April 2015 - 10:47

The launch

Tonight our lord and savior Elon Musk will do a launch (attempt) for an International Space Station resupply mission.

Named CRS-6 (the 6th cargo-resupply-services mission), SpaceX will use their Falcon 9 v1.1 rocket to blast the SpaceX Dragon capsule full of cargo into orbit.

 

Dutch time: 22:33

UK time: 21:33

 

The landing

This is not just awesome because rockets, or because of science experiments flying up to the space station, but there is something special to this launch: A landing.

After separation, the first stage of the rocket (which is about 75% of the entire rocket) will flip around, thrust backwards and perform a hypersonic reentry burn back into the atmosphere, using rocket thrust to reduce it's velocity. The rocket will steer itself towards a barge positioned in the Atlantic ocean, using thrust vectoring and hydraulically actuated grid fins. The unmanned barge is a floating landing pad built specifically for this purpose, often called ASDS, short for Autonomous Spaceport Drone Ship. It has a remarkable name: "Just read the instructions". A second ASDS is also under construction, called "Of course I still love you"

The rocket will then deploy landing legs, and softly touch down on the barge with rocket thrust.

This has never been done before. On a previous attempt SpaceX's rocket ran out of hydraulic fluid and came in sideways, slamming down and exploding on the barge. (video) This time SpaceX's Hans Koenigsmann, the vice president of mission assurance, said the landing 75-80% likely to be successful.

 

 

Why reuse rockets?

As long as mankind has been flying rockets, the rockets were expendable. One-time use and after that they fall in the sea and/or burn/break up in the atmosphere. Rockets are extremely expensive because of their complexity, size, and need for precision manufacturing. Contrary to popular belief, fuel cost is actually only 0,03% of the cost of the entire rocket!

Throwing a rocket away after 1 launch is much like building a new Boeing 747 for every plane trip. This would make a plane ticket cost tenthousands. But we refuel and refly planes, making plane tickets affordable for the normal person.

The idea is that rockets eventually fly like planes. Launch, land, refuel and refly.

The space shuttle was reusable, but the better word is actually "refurbishable". Every tile of the heatshield had to be inspected and possibly replaced, every engine had to be disassembled into 10000 components, each individually checked and rebuilt. This was way to expensive and is hardly "refuel and refly". SpaceX aims to make the rockets truly reusable. They have already began to make a land-based landing site as well.

In the end reusable rockets may slash the cost of going to space by a factor 10, or even 100. This opens up the satellite market for smaller companies, opens up space for tourism, and allows much more science missions that explore our universe for a fraction of the cost.

 

 

Why no parachutes?

Parachutes are actually incredibly heavy, and do not allow for precision landing. The extra fuel the rocket needs to carry to land is lighter or not much heavier than a parachute system. On top of that you don't want to drop the booster in seawater, as the salty water will corrode all of your precious alloys, making reusability a lot harder.

If this extra fuel was used for launching itself, the rocket would be able to put more payload in orbit, but the math is simple: Launch at a tenth of the cost and reuse the rocket, or launch for ten times that cost and bring 20-30% more cargo?

 

 

-LINKS-

 

View and buy rockets here:

http://www.spacex.com

 

Watch launches here:

http://www.spacex.com/webcast/

 

Neat countdown timer (to liftoff, not to broadcast start)

http://spacexstats.com/

 

True Muskians:

http://www.reddit.com/r/SpaceX

 

 

 

-PICS-

 

The Falcon 9

CRS-6_launch_prep_2015.jpg

 

 

The barge/ASDS: "Just read the instructions"

4de21742-7481-445c-a42f-53f58d62189c_640

 

 

"GO TO MARS OR GET BANKRUPTED TRYING"

mbjfJib.jpg


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#2 yagwog

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Posted 13 April 2015 - 10:55

how much of a hardon do you have right now psy 


my response to vaping being "cool" tbh fam

 

"stimulates the same circuitry that was simulated when u sucked on ur mommas titty

faggot"


#3 Sythen

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Posted 13 April 2015 - 11:12

a9X0jI1.jpg


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#4 Psycix

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Posted 13 April 2015 - 11:25

how much of a hardon do you have right now psy 

About this big:
crs5_static_fire.jpg


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#5 Sythen

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Posted 13 April 2015 - 11:37

Dem helical antennas.... (my mistake, lightning rods)


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#6 UnDead

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Posted 13 April 2015 - 21:55

Lel it was scrubbed for today due to weather. So much for your hardon Psy.


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#7 UnDead

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Posted 14 April 2015 - 21:36

Successful launch into orbit. Dragon is now en route to the ISS.

As for the Falcon 9, well it did land on the drone ship but unfortunately was not able to reduce it's velocity to perform a soft landing and thus hit the drone ship too hard and according to Elon Musk "Rocket landed on droneship, but too hard for survival"  :(

Edit: Best quote from the launch "We have Stage One separation. Good luck Stage One."

Edit 2 : Pic from the Drone ship

11039340_10155856826260131_2899064962415

That's so close to a bullseye, about 20 or so feet.


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#8 Psycix

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Posted 14 April 2015 - 23:10

Yeah, sadly it tipped over due to lateral movement.

We will get video in a few days. I'm curious to see what's left! :D


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#9 Psycix

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Posted 15 April 2015 - 20:01

Video of the almost-landing:

https://vine.co/v/euEpIVegiIx

 

They had control issues due to a sticky valve.

They haven't shown the resulting Rapid Unscheduled Disassembly.

 

 

Also this


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#10 Psycix

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Posted 15 April 2015 - 21:48

Bump for FUCKING THIS


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#11 TheMelonMan

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Posted 16 April 2015 - 00:02

Was this attempt any better than last time? 


Yeah because I wasn't the was I?!?

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#12 yagwog

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Posted 16 April 2015 - 11:00

Personally I think spaceX is a huge waste of time, how long has it been and they still haven't landed a rocket?


my response to vaping being "cool" tbh fam

 

"stimulates the same circuitry that was simulated when u sucked on ur mommas titty

faggot"


#13 Hardcore Bob

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Posted 16 April 2015 - 11:07

1400067851974.jpg

Step it up fagwog.

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#14 Psycix

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Posted 16 April 2015 - 11:09

 

Was this attempt any better than last time? 

 

Yes. Last time it was more of a crash when it came in half sideways. This time they landed badly due to the control issues and simply tipped over.

Based on a few rumors the actual reason for tipping over is that a leg broke due to coming down too hard too angled.

 

The first time they lost control due to running out of hydraulic fluid.

This time the control got fucked due to a sticky control valve.

I bet they'll get it right the next time or the time after. (Their first rocket (Falcon 1) had three failures in the beginning, and they never had a failure since so 4th time is the charm...)

 

Video of the first attempt:

https://vine.co/v/OjqeYWWpVWK


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#15 Psycix

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Posted 27 April 2015 - 18:49

Another SpaceX launch in 4 hours:

http://www.spacex.com/webcast/

 

No landing. Just a launch that you can watch if you are a silly fanboy like me.


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#16 Psycix

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Posted 22 May 2015 - 19:35

New video of spaceX's pad abort test.

 

 

In case you missed it, they tested the launch escape system which would pull the capsule with the astronauts away from a malfunctioning (exploding) rocket or other emergency situations where they want to GTFO. The test itself was unmanned and demonstrated a safe escape.

First video of that:


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#17 TheMelonMan

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Posted 05 October 2015 - 17:20

Semi-related: Steve Jurveston is a good friend of Musk's and is both an investor and board member of most his companies, including Space X and Tesla. These are two very interesting talks of his about the rate of technological change using examples of computing, rockets, biotech etc.

 

http://dfj.com/content/steve-jurvetson

 

 


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#18 Hardcore Bob

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Posted 27 January 2016 - 04:18

Since Loadingue didn't post it.

 


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