Author Topic: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3  (Read 720121 times)

Offline MarekCyzio

Port Canaveral Webcam shows OCSILY undamaged. At least that :)

Offline John Alan

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1481 on: 10/07/2016 02:23 PM »
Port Canaveral Webcam shows OCSILY undamaged. At least that :)

Yep... and the Elsbeth twins (III and II) are still present behind her and riding the storm just fine...  8)

On edit...
Added snapshot below...
OCISLY with Elsbeth III on the back right (black pilot house pole) and Elsbeth II on the back left (white and taller pilothouse pole)

Later edit
Source of below picture crop posted earlier...
https://twitter.com/PTZtv/status/784392604901265408
« Last Edit: 10/07/2016 03:42 PM by John Alan »

Offline John Alan

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1482 on: 10/07/2016 07:47 PM »
A certain webcam is working off and on...  ;)
I just saw Elsbeth III slowly cross the channel back over toward Fishlips... last seen nosed up to the south side of the channel pointed south... only the back 1/2 of the boat was last visible pointed back North...
OCISLY and Elsbeth II remain at their posts... very dark and overcast... winds have died way down...  :)

« Last Edit: 10/07/2016 07:48 PM by John Alan »

Offline MarekCyzio

My favorite barge is safe at the port.

Offline John Alan

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1484 on: 10/07/2016 10:44 PM »
A certain webcam now shows the E sisters parked side by side again near Fishlips...  8)

Offline MarekCyzio

OCISLY yesterday.

Offline CyndyC

Both GO ships were in Jacksonville again late yesterday evening for some reason, and I think that's where they went during Matthew. Maybe they never left and just weren't updating. There was an alert they arrived at Jax just before the storm, but then another alert that they left Jax when Matthew was almost to the Cape, and nowhere to be found on MarineTraffic.

Just curious, does anyone know where all the Port Canaveral boats could go for safety, particularly the large cruise ship? If the cruise ship came here, it wasn't in the news but probably would have been, and we weren't hearing that Jax would be any safer either.
"Either lead, follow, or get out of the way." -- quote of debatable origin tweeted by Ted Turner and previously seen on his desk

Offline MarekCyzio

Both GO ships were in Jacksonville again late yesterday evening for some reason, and I think that's where they went during Matthew. Maybe they never left and just weren't updating. There was an alert they arrived at Jax just before the storm, but then another alert that they left Jax when Matthew was almost to the Cape, and nowhere to be found on MarineTraffic.

Just curious, does anyone know where all the Port Canaveral boats could go for safety, particularly the large cruise ship? If the cruise ship came here, it wasn't in the news but probably would have been, and we weren't hearing that Jax would be any safer either.

All large ships departed Port Canaveral ahead of Matthew. With two exceptions - OCSILY and Victory Casino Crusies. Two smaller ships broke off and managed to hit dock next to Grills restaurant during storm.

Offline CyndyC

All large ships departed Port Canaveral ahead of Matthew. With two exceptions - OCSILY and Victory Casino Crusies. Two smaller ships broke off and managed to hit dock next to Grills restaurant during storm.

Yes, I know, and you had at least one large cruise ship leave, but where could and did it run to?
"Either lead, follow, or get out of the way." -- quote of debatable origin tweeted by Ted Turner and previously seen on his desk

Online guyw

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1489 on: 10/11/2016 04:42 PM »
Cruise ships usually stay at sea and avoid the storm. If they have enough warning, they are fast enough to be able to head where the storm isn't.

Offline John Alan

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1490 on: 10/11/2016 04:53 PM »
My guess is the larger boats ran East a fair distance at speed then turned south into the breeze on the far side of Mathew and waited for it to pass...  ???
As long as a boat has some speed (say 20+knots) and does not break down... outrunning and outflanking a hurricane is doable...
The container ship that sank a while back in a big storm had it's engines fail and was lost as a result...
The internet (two sources) indicates Go Searcher is headed back to Port Canaveral today...  ;)
The Elsbeth Tugs are made to pull hard (70 tons pull) but are limited on top speed as a result (big slow props)...
They had no choice but to wait out the storm in port... got up next to a north wall (for some wind protection) and rode it out with OCISLY...  8)
« Last Edit: 10/11/2016 05:00 PM by John Alan »

Offline CyndyC

Cruise ships usually stay at sea and avoid the storm. If they have enough warning, they are fast enough to be able to head where the storm isn't.


I considered that possibility, but there wasn't much of anywhere within 100s of miles that this storm wasn't, and further east was Hurricane Nicole. Good to know they got back to Port Canaveral okay.


My guess is the larger boats ran East a fair distance at speed then turned south into the breeze on the far side of Mathew and waited for it to pass...  ???

Well, maybe east and then north with Hurricane Nicole to the east and south.

Quote
As long as a boat has some speed (say 20+knots) and does not break down... outrunning and outflanking a hurricane is doable...
The container ship that sank a while back had it's engines fail and was lost as a result...

The El Faro captain thought flanking the hurricane was doable too.
"Either lead, follow, or get out of the way." -- quote of debatable origin tweeted by Ted Turner and previously seen on his desk

Offline Sam Ho

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1492 on: 10/11/2016 05:01 PM »
Victory I apparently stayed because it wasn't fast enough to avoid the storm, per comments from Port Canaveral CEO John Murray before the storm.

Quote
“Victory I is here too, it probably isn’t fast enough to get away from the storm. It will have skeleton crew on board,” Murray said.

http://www.orlandosentinel.com/weather/hurricane/os-hurricane-matthew-port-20161005-story.html

Offline mfck

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1493 on: 10/23/2016 11:14 PM »
Per EMs AMA on reddit now, the BFS carbon dev tank shown at IAC is going to be pressurised to 2/3 of its design burst pressure on an ocean barge in the coming weeks.

Offline CJ

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1494 on: 10/23/2016 11:32 PM »
Per EMs AMA on reddit now, the BFS carbon dev tank shown at IAC is going to be pressurised to 2/3 of its design burst pressure on an ocean barge in the coming weeks.

My guess is that does not mean an ASDS. My reasoning is that Musk never calls the ASDSs "barges", and also that the ASDS are quite expensive, needed, and valuable, so why risk damaging one when a barge would do?


Offline mfck

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1495 on: 10/23/2016 11:36 PM »
Per EMs AMA on reddit now, the BFS carbon dev tank shown at IAC is going to be pressurised to 2/3 of its design burst pressure on an ocean barge in the coming weeks.

My guess is that does not mean an ASDS. My reasoning is that Musk never calls the ASDSs "barges", and also that the ASDS are quite expensive, needed, and valuable, so why risk damaging one when a barge would do?
On the other hand, ASDS is impact and fire hardened, autonomous, well instrumented and available. It will not be needed until RTF at least. I doubt a pressure burst can hurt it much, but we'll see.
« Last Edit: 10/23/2016 11:37 PM by mfck »

Offline CameronD

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1496 on: 10/24/2016 12:30 AM »
Per EMs AMA on reddit now, the BFS carbon dev tank shown at IAC is going to be pressurised to 2/3 of its design burst pressure on an ocean barge in the coming weeks.

My guess is that does not mean an ASDS. My reasoning is that Musk never calls the ASDSs "barges", and also that the ASDS are quite expensive, needed, and valuable, so why risk damaging one when a barge would do?
On the other hand, ASDS is impact and fire hardened, autonomous, well instrumented and available. It will not be needed until RTF at least. I doubt a pressure burst can hurt it much, but we'll see.
The ASDS is certainly not impact nor fire hardened.. but yes, it is autonomous and available and is kitted out with remotely-operated fire-fighting capability.

I guess we'll know they plan to use it if it moves...
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Offline mfck

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1497 on: 10/24/2016 02:34 AM »
Per EMs AMA on reddit now, the BFS carbon dev tank shown at IAC is going to be pressurised to 2/3 of its design burst pressure on an ocean barge in the coming weeks.

My guess is that does not mean an ASDS. My reasoning is that Musk never calls the ASDSs "barges", and also that the ASDS are quite expensive, needed, and valuable, so why risk damaging one when a barge would do?
On the other hand, ASDS is impact and fire hardened, autonomous, well instrumented and available. It will not be needed until RTF at least. I doubt a pressure burst can hurt it much, but we'll see.
The ASDS is certainly not impact nor fire hardened.. but yes, it is autonomous and available and is kitted out with remotely-operated fire-fighting capability.

I guess we'll know they plan to use it if it moves...
I guess 'ready' is a more appropriate term.

Online Comga

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1498 on: 10/24/2016 03:36 AM »
Scuba tanks are filled to near volumetric capacity with water before burst testing.  There is no energy stored in water under compression so if and when the tank bursts, little energy is released.

Given that these are cryogenic tanks, would a room temperature test be meaningful?

If they want to have the tank at operational temperature (at least on the inside) could they use liquid nitrogen, which could avoid the dangers of liquid oxygen flowing if the tank bursts?

Either way, how would they get a giant tank full of liquid cryogen on a barge out in the ocean, or even a few hundred meters off shore?
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline envy887

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Re: SpaceX's Autonomous Spaceport Drone Ship Discussion Thread 3
« Reply #1499 on: 10/24/2016 03:55 AM »
...
Either way, how would they get a giant tank full of liquid cryogen on a barge out in the ocean, or even a few hundred meters off shore?
Fill it up, let a little boil off as it's towed out, then anchor it and press for the test.

They might insulate it to minimize boil off

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