Author Topic: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2  (Read 2397180 times)

Offline Ohsin

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #420 on: 01/03/2015 05:15 PM »
All I have seen so far is lot of activity in/out/top of containers and deck cleaning...and random huddles over deck...I don't think they did anything to thrusters so far :P
« Last Edit: 01/03/2015 05:16 PM by Ohsin »
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Offline PhilW

All I have seen so far is lot of activity in/out/top of containers and deck cleaning...and random huddles over deck...I don't think they did anything to thrusters so far :P
Was a line of water churning up directly away from the aft starboard thruster for maybe 30 sec. Started small but built up to almost reach the dock side. As a Yachtie, know what it looks like in the water when you warm up the diesel.

Offline kch

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #422 on: 01/03/2015 05:26 PM »

It's there!!! webcam updates every ~7 sec
Nice.
Best luck the web cam is still there when GauntletX returns with F9 secured to the deck / glove. ;)

Stop making up your own names for things. Just stop it.

"We are not a Mews'd"?   ;)

Online meekGee

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #423 on: 01/03/2015 05:40 PM »

It's there!!! webcam updates every ~7 sec
Nice.
Best luck the web cam is still there when GauntletX returns with F9 secured to the deck / glove. ;)

Stop making up your own names for things. Just stop it.

"We are not a Mews'd"?   ;)

Even worse, something something make him run the gauntlet something.
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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #424 on: 01/03/2015 05:56 PM »
Ixnay on the naming posts, take that to the party thread.
"I think it would be great to be born on Earth and to die on Mars. Just hopefully not at the point of impact." -Elon Musk
"We're a little bit like the dog who caught the bus" - Musk after CRS-8 S1 successfully landed on ASDS OCISLY

Offline geza

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #425 on: 01/03/2015 06:13 PM »
All I have seen so far is lot of activity in/out/top of containers and deck cleaning...and random huddles over deck...I don't think they did anything to thrusters so far :P
Was a line of water churning up directly away from the aft starboard thruster for maybe 30 sec. Started small but built up to almost reach the dock side. As a Yachtie, know what it looks like in the water when you warm up the diesel.
Seemingly, they are not in hurry. If I were them I would depart early morning. Testing everything today and leaving tomorrow?

By the way, do they know that we observe them? :-)

Offline Ohsin

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #426 on: 01/03/2015 06:21 PM »
I have a new theory on ASDS deck.. It is an Ice skating rink.
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Offline Robotbeat

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #427 on: 01/03/2015 06:24 PM »
...
By the way, do they know that we observe them? :-)
Is it possible that some people at SpaceX are on the Internet? ;)
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Offline John-H

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #428 on: 01/03/2015 07:10 PM »
There is one thing I am not clear on yet. How much "cross range" does the landing stage have?  If some factor such as high level winds move the landing point, how much can they recover while the stage is on final approach?  It would a shame to see a perfect touchdown, but a quarter mile away from the barge.

John

Offline cartman

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #429 on: 01/03/2015 07:16 PM »
Yes, i am running one as well, loosely based on the code of doersino. That's how i found the 7sec interval.

Here is a video from the arrival of Carnival Fascination

Thanks, cartman.

Does anyone have the programs and ability to keep a screen capture program running to capture every frame (whether 30 s or 7s) so that we might later be able to see and analyze a departure video for ASDS, GoQuest and Elsbeth III?  Watching the prep, no. of people visible on board, etc.

Online meekGee

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #430 on: 01/03/2015 07:39 PM »
There is one thing I am not clear on yet. How much "cross range" does the landing stage have?  If some factor such as high level winds move the landing point, how much can they recover while the stage is on final approach?  It would a shame to see a perfect touchdown, but a quarter mile away from the barge.

John

That's the main function of the grid fins - to correct for unexpected wind and for any errors in the reentry burn.

Ever since we learned about F9R, this question always lingered - how do you control stage between the reentry burn and the terminal landing burn.  The idea of only doing it with cold gas RCS and stage attitude seemed a little "underpowered". It turned out to be enough to stabilize the stage so it does not tumble, but not enough to guarantee that can hit the box from which terminal landing can take place.

There were many speculations about active control surfaces, either on the front (active feet, etc) or on the back, and even one poster guessed it right, suggesting grid fins.

There are 20-30 km of useful atmosphere, and I hope they can affect a 5-10% off-vertical path, so a post-insertion burn correction of 1-3 km?

Actually it can be a lot more if the stage still has significant horizontal motion at 20-30 km.
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Offline Ohsin

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #431 on: 01/03/2015 07:59 PM »
They inflated something near Elsbeth III and deflated it.

EDIT: http://www.cruisin.me/cruise-ship-webcams/carnival-cruise-lines/carnival-fascination.php is back. Also footage is frozen at the moment.
« Last Edit: 01/03/2015 08:01 PM by Ohsin »
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Offline Avron

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #432 on: 01/03/2015 08:03 PM »
There is one thing I am not clear on yet. How much "cross range" does the landing stage have?  If some factor such as high level winds move the landing point, how much can they recover while the stage is on final approach?  It would a shame to see a perfect touchdown, but a quarter mile away from the barge.

John

That's the main function of the grid fins - to correct for unexpected wind and for any errors in the reentry burn.

Ever since we learned about F9R, this question always lingered - how do you control stage between the reentry burn and the terminal landing burn.  The idea of only doing it with cold gas RCS and stage attitude seemed a little "underpowered". It turned out to be enough to stabilize the stage so it does not tumble, but not enough to guarantee that can hit the box from which terminal landing can take place.

There were many speculations about active control surfaces, either on the front (active feet, etc) or on the back, and even one poster guessed it right, suggesting grid fins.

There are 20-30 km of useful atmosphere, and I hope they can affect a 5-10% off-vertical path, so a post-insertion burn correction of 1-3 km?

Actually it can be a lot more if the stage still has significant horizontal motion at 20-30 km.

A rotating cylinder can create significant lift , thus can be used as a lifting body and get a good deal of x range

Offline Helodriver

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #433 on: 01/03/2015 08:28 PM »
They inflated something near Elsbeth III and deflated it.

EDIT: http://www.cruisin.me/cruise-ship-webcams/carnival-cruise-lines/carnival-fascination.php is back. Also footage is frozen at the moment.


Possibly one of these? Tough to tell, but about the right size. I've used one, live internet to/from anywhere with good data rates.

Offline Darga

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #434 on: 01/03/2015 08:36 PM »
Carnival Fascination has just left so unfortunately we won't be able to see the barge depart. We will have to settle for tracking the Go Quest and ELSBETH III.

Offline akku

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #435 on: 01/03/2015 09:12 PM »
ELSBETH III moving !
is on the way to the other side ASDS
« Last Edit: 01/03/2015 09:15 PM by akku »

Offline Ohsin

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #436 on: 01/03/2015 09:15 PM »
They inflated something near Elsbeth III and deflated it.

EDIT: http://www.cruisin.me/cruise-ship-webcams/carnival-cruise-lines/carnival-fascination.php is back. Also footage is frozen at the moment.


Possibly one of these? Tough to tell, but about the right size. I've used one, live internet to/from anywhere with good data rates.

Took about ~7min to inflate and it was gone with in 7 seconds .. I think it popped whatever it was.
« Last Edit: 01/03/2015 09:59 PM by Ohsin »
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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #437 on: 01/03/2015 09:15 PM »
...

That's the main function of the grid fins - to correct for unexpected wind and for any errors in the reentry burn.

...

A rotating cylinder can create significant lift , thus can be used as a lifting body and get a good deal of x range

They explicitly don't rotate the stage.  Also the stage enters engines first, not broadside as would be required to generate lift.
Space is not Highlander.  There can, and will, be more than one.

Offline QuantumG

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #438 on: 01/03/2015 09:19 PM »
Surely that's a weather balloon.
I hear those things are awfully loud. It glides as softly as a cloud. What's it called? Monowhale!

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #439 on: 01/03/2015 09:51 PM »
Surely that's a weather balloon.
He showed it to be an inflatable 2.4 meter satellite antenna.
And stop calling him Shirley.  8)
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

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