Author Topic: SpaceX Rocket  (Read 7696 times)

Re: SpaceX Rocket
« Reply #50 on: February 07, 2018, 12:24:32 am »
I'm fairly certain that they have ships nearby with people observing the landing. I know that they usually get people onboard the landing barge fairly quickly to weld it down.

For values of 'nearby' that provide a reasonable degree of protection from being accidentally bombed from space, so they probably can't tell much more than "it went boom" until they've waited for the fire to die down and decided it's safe to approach and recover the wreckage / data loggers.

Close enough that they can visually tell if if it landed or not.

Edit: I just had this confirmed (3rd hand source). They do have visual line of sight to the landing barge.

Kim

  • Timelord
Re: SpaceX Rocket
« Reply #51 on: February 07, 2018, 12:46:23 am »
I've heard a rumour on the internets (someone else's 3rd hand source) that it soft-landed on the edge of the barge and toppled (apparently there's a bit of landing leg visible in the last frame of video that was uplinked).  We'll see, but that sounds like a likely failure mode.

Meanwhile, I've been watching the sunrise reflected in the Tesla's windscreen, with lightning storms on earth visible in the background.  This is what happens when extremely well resourced engineers accidentally do art.
To ride the Windcheetah, first, you must embrace the cantilever...

Jaded

  • The Codfather
  • Formerly known as Jaded
Re: SpaceX Rocket
« Reply #52 on: February 07, 2018, 08:28:59 am »
From the Beeb

Quote
The third booster was due to settle on a drone ship stationed several hundred kilometres out at sea. Unfortunately, it had insufficient propellant left to slow the descent, missed the target vessel and was destroyed as it hit the water at some 500km/h.
By then, the upper-stage of the Falcon Heavy, with its Tesla cargo, was heading on a trajectory that would hopefully take it towards Mars' orbit.
That required the engine on the upper-stage to fire on three separate occasions, with the third and final ignition only occurring after a long cruise phase - something which was confirmed some six hours after the launch.
If you don't like your democracy, vote against it.

Re: SpaceX Rocket
« Reply #53 on: February 07, 2018, 08:58:44 am »
I like the fact that the Tesla has a copy of Hitchhikers Guide to the Galaxy in the glove box.
I think you'll find it's a bit more complicated than that.

mattc

  • n.b. have grown beard since photo taken
    • Didcot Audaxes
Re: SpaceX Rocket
« Reply #54 on: February 07, 2018, 09:00:03 am »
I like the fact that the Tesla has a copy of Hitchhikers Guide to the Galaxy in the glove box.
Is that the edition with - or without - the Ford Prefect revisions?
Has never ridden RAAM
---------
No.11  Because of the great host of those who dislike the least appearance of "swank " when they travel the roads and lanes. - From Kuklos' 39 Articles

Cudzoziemiec

  • Solar powered, tea fuelled cycle-wol
Re: SpaceX Rocket
« Reply #55 on: February 07, 2018, 09:08:57 am »
An ungovernable laughter, a joyous agitation which makes the summer stretching before you seem like an unrolling canvas on which you might draw those first rude pure strokes that are free. (Capote)

Re: SpaceX Rocket
« Reply #56 on: February 07, 2018, 11:19:50 am »
As the tail of the Space Shuttle passed the top of the gantry it was doing 125mph.  That's a heck of a shove from a standing start.
It looks slow because it takes so long for it to move through its own length.  Our visual system isn't calibrated for fast-moving objects bigger than those found in nature, which realistically means a horse.
Never tell me the odds.

ian

  • fatuously disingenuous
    • The Suburban Survival Guide
Re: SpaceX Rocket
« Reply #57 on: February 07, 2018, 11:33:08 am »
It was quite interesting watching the speedometer climb. 0-60 in not very much time at all.
!nataS pihsroW

Re: SpaceX Rocket
« Reply #58 on: February 07, 2018, 01:07:47 pm »
From the Beeb

Quote
The third booster was due to settle on a drone ship stationed several hundred kilometres out at sea. Unfortunately, it had insufficient propellant left to slow the descent, missed the target vessel and was destroyed as it hit the water at some 500km/h.
By then, the upper-stage of the Falcon Heavy, with its Tesla cargo, was heading on a trajectory that would hopefully take it towards Mars' orbit.
That required the engine on the upper-stage to fire on three separate occasions, with the third and final ignition only occurring after a long cruise phase - something which was confirmed some six hours after the launch.

Just before the live stream cut to the landing of the booster rockets when it was a four way split the upper left view of the main core returning appears to get splattered with liquid. This may explain the insufficient available propellant.

Kim

  • Timelord
Re: SpaceX Rocket
« Reply #59 on: February 07, 2018, 01:27:58 pm »
I think the Beeb are oversimplifying.  At the press conference Elon suggested the issue was a lack of TEA-TEB pyrophoric igniter[1], rather than propellant itself.  There was plenty of fuel/oxidiser, but they couldn't re-light more than one engine.

Sounds like one of those simple to fix mistakes, like running out of hydraulic fluid on the early attempts at droneship landing.


[1] This is as good a time as any to mention that Ignition is being reissued.
To ride the Windcheetah, first, you must embrace the cantilever...

hulver

  • I am a mole and I live in a hole.
Re: SpaceX Rocket
« Reply #60 on: February 07, 2018, 03:50:40 pm »
I like the fact that the Tesla has a copy of Hitchhikers Guide to the Galaxy in the glove box.
Imagine if somebody had slipped Elon a few million quid to have their body stuffed in a spacesuit and strapped into the car.

Re: SpaceX Rocket
« Reply #61 on: February 07, 2018, 04:11:48 pm »
What's its carbon footprint?  Just askin'..
Sic transit and all that..

LEE

  • "Shut Up Jens" - Legs.
Re: SpaceX Rocket
« Reply #62 on: February 07, 2018, 04:23:35 pm »
I think the Beeb are oversimplifying.  At the press conference Elon suggested the issue was a lack of TEA

Tsk tsk...Would never happen in a Yorkshire Space Program
Some people say I'm self-obsessed but that's enough about them.

Kim

  • Timelord
Re: SpaceX Rocket
« Reply #63 on: February 07, 2018, 04:55:39 pm »
What's its carbon footprint?  Just askin'..

It's burning RP1 (kerosene), so in terms of fuel burnt it's going to be fairly terrible.  On the other hand, re-usability will save the impact of building a new rocket each time, which is a welcome innovation.

The BFR will be designed around liquid methane propellant instead, because that's practical to make on Mars from carbon dioxide and water.  Elon makes the valid point that if you can make fuel from carbon dioxide, water and solar power on Mars, you could potentially do the same thing on Earth.  So the BFR wouldn't be tied to fossil fuels in the long term.

On that basis I'm half expecting economically viable synthetic gas to be another commercial spinoff of Elon's Mars obsession.  Assuming of course that Special Circumstances don't catch up with him first.  :)
To ride the Windcheetah, first, you must embrace the cantilever...

Re: SpaceX Rocket
« Reply #64 on: February 07, 2018, 06:18:15 pm »
  Assuming of course that Special Circumstances don't catch up with him first.  :)

Heh. Just catching up on the Culture series again after a long (10+ years break).

nicknack

  • Hornblower
Re: SpaceX Rocket
« Reply #65 on: February 07, 2018, 06:48:23 pm »
When I was little (-ish, about 55 years ago) all rockets (in stories) landed like those 2 boosters. It's taken this long to actually see it become real. Absolutely fuckin' brilliant!
There's no vibrations, but wait.

Re: SpaceX Rocket
« Reply #66 on: February 07, 2018, 06:53:15 pm »
I’m a bit dubious about the launching a car into space bit. It’s a continuation of the sort of behaviour that has got us into the position of probably needing a new planet to live on sooner than ideal.

*party pooper*

nicknack

  • Hornblower
Re: SpaceX Rocket
« Reply #67 on: February 07, 2018, 07:11:58 pm »
I’m a bit dubious about the launching a car into space bit. It’s a continuation of the sort of behaviour that has got us into the position of probably needing a new planet to live on sooner than ideal.

*party pooper*
Nah. It's just a lot more interesting (and, I hope, inspiring to young folk) than the lump of concrete that NASA used to use.
There's no vibrations, but wait.

ian

  • fatuously disingenuous
    • The Suburban Survival Guide
Re: SpaceX Rocket
« Reply #68 on: February 07, 2018, 07:14:08 pm »
Shooting a lot more cars into space would solve many parking problems. I'm all for it. Let's not ask the owners first, though. I say we start with Audis and Range Rovers.
!nataS pihsroW

Re: SpaceX Rocket
« Reply #69 on: February 07, 2018, 07:16:43 pm »
I’m a bit dubious about the launching a car into space bit. It’s a continuation of the sort of behaviour that has got us into the position of probably needing a new planet to live on sooner than ideal.

*party pooper*

They need to use something as a payload test. They sometimes have used actual satellites but that gets a bit expensive if the rocket goes bang rather than zoom. They could have used a lump of concrete or similar but a Tesla was a bit more whimsical. One of the smaller SpaceX rockets used a wheel of cheese as a test payload for some reason I cant recall. It's bit difficult to despoil space anyway as its already full of hard radiation and bits of rubbish left over from the formation of the solar system whizzing around everywhere. The worst you can do is become a navigational hazard and the Tesla is being sent way way out not left in orbit.
I think you'll find it's a bit more complicated than that.

Kim

  • Timelord
Re: SpaceX Rocket
« Reply #70 on: February 07, 2018, 07:25:13 pm »
Shooting a lot more cars into space would solve many parking problems. I'm all for it. Let's not ask the owners first, though. I say we start with Audis and Range Rovers.

Dangerous precedent.  "No ossifer, it landed there on a vertical-landing orbital booster.  I didn't drive on the pavement."
To ride the Windcheetah, first, you must embrace the cantilever...

Kim

  • Timelord
Re: SpaceX Rocket
« Reply #71 on: February 07, 2018, 07:30:13 pm »
I’m a bit dubious about the launching a car into space bit. It’s a continuation of the sort of behaviour that has got us into the position of probably needing a new planet to live on sooner than ideal.

*party pooper*

They need to use something as a payload test. They sometimes have used actual satellites but that gets a bit expensive if the rocket goes bang rather than zoom. They could have used a lump of concrete or similar but a Tesla was a bit more whimsical. One of the smaller SpaceX rockets used a wheel of cheese as a test payload for some reason I cant recall. It's bit difficult to despoil space anyway as its already full of hard radiation and bits of rubbish left over from the formation of the solar system whizzing around everywhere. The worst you can do is become a navigational hazard and the Tesla is being sent way way out not left in orbit.

And at this point, it's a navigational hazard that's interesting enough that one day someone might actually bother to recover it and put it in a museum.  On Mars.

It seems wasteful that they didn't fill it with student cubesats, or strap an engineering model of Beagle 2 to the front of the Tesla or something, but that only seems like a missed opportunity because it didn't blow up.  Otherwise it would have been wasted effort.
To ride the Windcheetah, first, you must embrace the cantilever...

Aunt Maud

  • Le Flâneur.
Re: SpaceX Rocket
« Reply #72 on: February 07, 2018, 07:31:03 pm »
Could it be the corpse of David Bowie at the wheel ?

Kim

  • Timelord
Re: SpaceX Rocket
« Reply #73 on: February 07, 2018, 07:35:16 pm »
Could it be the corpse of David Bowie at the wheel ?

I was kind of hoping for a mannequin full of sensors, to give the space suit a test[1].  But if they did that, they're keeping quiet about it.


[1] A fairly extreme one, given that it's not actually designed for EVA.
To ride the Windcheetah, first, you must embrace the cantilever...

Aunt Maud

  • Le Flâneur.
Re: SpaceX Rocket
« Reply #74 on: February 07, 2018, 07:44:27 pm »
Maybe I should get out a bit more.