Author Topic: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2  (Read 2398245 times)

Offline PhilW


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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #381 on: 01/03/2015 02:18 AM »
Fascination is due in port shortly. Wonder if #BargeX / Falcon's Nest will still be there when she arrives?
http://www.cruisin.me/ship_tracker/carnival_cruise_lines/carnival_fascination.php
Go Quest is underway at 0.1 knots with destination Blake Plateau at this time.

No - nevermind - its track looks like it's just jostling around.  Keep an eye on it, though ...
Thought that Tugs reference has proven to be unreliable in the past as it gets turned off. But should shown when it leaves the dock. ;)

Well, the tug's is turned off - Elsbeth III - http://www.marinetraffic.com/en/ais/details/ships/mmsi:367017460/shipid:434560/vessel:ELSBETH%20III , but Go Quest's is on.

Hmpf - Elsbeth III reported in 3 minutes ago, so I guess they're both on.

I don't find Fascination on the tracker, and didn't think it made port until morning (I don't actually know its schedule).

But both the tug and the escort transponders appear to be on atm.
« Last Edit: 01/03/2015 02:21 AM by Eer »


Offline deruch

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #383 on: 01/03/2015 02:21 AM »

... And now, back to the Fascination vid feed, tonight's main event.

Tonight is still the undercard.  Main event will hopefully be on the 8th.  CRS-5 is on the 6th with landing around 6:35am and Fascination departs Jacksonville on the 8th at 4pm.  I'm not that hopeful that the cam will capture images of the returning stage on the barge.  If for no other reason that the sailing time between the landing area and port may be longer than the window.  But that would definitely be the main event.
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Offline PhilW

Fascination is due in port shortly. Wonder if #BargeX / Falcon's Nest will still be there when she arrives?
http://www.cruisin.me/ship_tracker/carnival_cruise_lines/carnival_fascination.php
Go Quest is underway at 0.1 knots with destination Blake Plateau at this time.

No - nevermind - its track looks like it's just jostling around.  Keep an eye on it, though ...
Thought that Tugs reference has proven to be unreliable in the past as it gets turned off. But should shown when it leaves the dock. ;)

Well, the tug's is turned off - Elsbeth III - http://www.marinetraffic.com/en/ais/details/ships/mmsi:367017460/shipid:434560/vessel:ELSBETH%20III , but Go Quest's is on.
Saw that.



Offline deruch

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Shouldn't reality posts be in "Advanced concepts"?  --Nomadd

Online Robotbeat

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #388 on: 01/03/2015 02:28 AM »
..
...
What's left untested, therefore, is just the deviation of real-life grid fin behavior from the modeled one.  This, in the grand scheme of things, is a pretty low risk.
...
I agree they've retired the vast majority of the overall risks, but I would NOT say that "deviation of real-life grid fin behavior from the modeled one" is low-risk. I'm thinking of specific instances where rockets were lost because real-life fin behavior deviated from the modeled one. Usually this happens when the vehicle goes transonic, a regime which the grid fins have yet to see in flight.

Just because they've done most of the hard parts doesn't mean their probably of success on this particular flight should thus be greater than 50%. It really does only take one thing to screw up your multi-million-dollar vehicle. So I think Musk is making an accurate assessment of the risk.

For instance, see this exchange on Twitter:
Look.  John Carmack said "inversion" and now it's the internet risk de jour...
Stop right there. I didn't start thinking it'd be a problem just because Carmack mentioned it on Twitter. It's a serious issue that gets brought up on ARocket sometimes and something similar is probably what killed BlueOrigin's last suborbital vehicle at around Mach 1.2. Just because people know about it doesn't mean it's not a serious challenge to address.
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Offline deruch

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Offline PhilW

Go Quest tracking:
https://www.marinetraffic.com/en/ais/home/zoom:10/shipid:450521/mmsi:367564890/centerx:-81.58316/centery:30.40951

Fascination tracking:
http://www.cruisin.me/ship_tracker/carnival_cruise_lines/carnival_fascination.php
Select Tracker Mapping Option B

Fascination forward web cam:
http://www.cruisin.me/cruisecams/ships/carnival_cruise_lines/carnival_fascination.php

Elsbeth III (tug) tracking:
http://www.marinetraffic.com/en/ais/home/centerx:-81.58298/centery:30.40965/zoom:8/mmsi:367017460/shipid:434560
Thanks for that. Updated the list with your data ;)

Falcon's Nest layout.

Horses, when not being ridden, are kept in a stable.  Falcons, when not being flown, are kept in a mews.
Expect this Falcon is going to be a highly visible STAR, thus needs a nice place to be seen in all it's just returned from space finery. Then it will return to it's Mews in either Texas or Calif.
« Last Edit: 01/03/2015 02:54 AM by PhilW »

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Offline PhilW


Offline go4mars

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #393 on: 01/03/2015 03:20 AM »
After completing field tasks, yet before return flight to the rookery, the falconer's gauntlet provides familiar support for a reward of sustenance.
« Last Edit: 01/03/2015 03:36 AM by go4mars »
Elasmotherium; hurlyburly Doggerlandic Jentilak steeds insouciantly gallop in viridescent taiga, eluding deluginal Burckle's abyssal excavation.

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #394 on: 01/03/2015 03:36 AM »
Even if "Gauntlet" means "place where Falcons go to breed", I don't care, it sounds good.

What it needs, along these lines, is a falcon figurehead.
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Offline PhilW

"Gauntlet" is good name for the ASDS.

Hope SpX has well trained this Falcon so it can find and land on the Gauntlet.

Offline go4mars

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #396 on: 01/03/2015 03:38 AM »
What it needs, along these lines, is a falcon figurehead.
Chewie?  Han?  Peregrine?


Actually, I think "Model X" is best endowed to claim figureheadhood.  ;)
« Last Edit: 01/03/2015 03:52 AM by go4mars »
Elasmotherium; hurlyburly Doggerlandic Jentilak steeds insouciantly gallop in viridescent taiga, eluding deluginal Burckle's abyssal excavation.

Offline PhilW

What it needs, along these lines, is a falcon figurehead.
Chewie?  Han?  Or Peregrine?
Maybe paint a BIG Gauntlet on the deck?

Gotta be careful to not attract more than one!
« Last Edit: 01/03/2015 03:51 AM by PhilW »

Offline OxCartMark

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #398 on: 01/03/2015 03:55 AM »
An accumulation of low grade comments:

With the posting earlier of a picture of the I-295 bridge (http://en.wikipedia.org/wiki/Dames_Point_Bridge ) I had a thought that there may be a webcam up there.  I couldn’t find one there or anywhere along the river.  But that doesn’t mean there isn’t one, its probably more a sign of my search skills.  Can anyone find one along the return route?

In my search for webcams I was on the JAXPORT site.  For what little its worth, JAXPORT says that the cruise ship terminal is a temporary facility.

As mentioned earlier, the destination for Go Quest is set as the Blake Plateau.  So I looked it up.  Its just a large underwater plateau off the coast of Georgia and South Carolina, not a very specific destination (the specific destination which we know from the FCC filing) http://en.wikipedia.org/wiki/Blake_Plateau

Because SpX engineers know about the Inversion issue, their grid fin flight control software should be able to compensate for it and still maintain the desired F9 attitude control capability.
  Huh?  I thought that there was no control inversion issue with grid fins (non-linear behavior yes, but still “forward”) unless there was a secondary reason, such as when the wake of the grid fins acts on another surface of the vehicle.?.  I’m definitely not authoritative enough to say that for fact but I want to swing that out there as bait to see if we can get someone with a solid background to put this to bed (or not).

Silly debate continues on the name of the barge, I thought I had resolved it earlier.  It’s a Spacecraft Carrier.  That is my decree!

Or it may be best since there will soon be more of them to use "spacecraft carrier" as a vessel type descriptor with names assigned to each individual one.  If we go that way then whatever name is selected for this one must fit in a pattern which has names available for the others.  For instance, the vehicle type of crawler-transporter has two named vehicles, Hans and Franz.

Or if they never get around to painting over "Marmac 300" I offer the following revisionist interpretation of that name;

   M obile
   A dvanced
   R ocket
   M oving
   A utonomous
   C arrier

   300: Allows for BFR up to 300’ height

Good night

Mark

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 2
« Reply #399 on: 01/03/2015 04:05 AM »
An accumulation of low grade comments

Wasn't sure there for a minute whether your observation was forward or backward looking  :)
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