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Sigmetnow

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Re: SpaceX
« Reply #250 on: August 07, 2019, 03:36:34 PM »
Quote
Elon Musk (@elonmusk) 8/7/19, 1:10 AM
Rocket fairing falling from space (higher res)
https://twitter.com/elonmusk/status/1158968745227780096
At the link:  Excellent video clip of The Catching.

Edit:  here’s a screen cap, in case you can’t get to the video:
« Last Edit: August 07, 2019, 03:50:22 PM by Sigmetnow »
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Sigmetnow

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Re: SpaceX
« Reply #251 on: August 07, 2019, 03:42:46 PM »
12 block 5 boosters have been flown a total of 27 times. 2 have been deliberately expended and 2 destroyed in attempted landing/transport after landing.

Stats will change over time. However, on these figures, do we see no real potential for more than 27/2=13.5 flights per booster and it will take some time to get there. On such figures, it hardly seems worth doing a substantial refurbishment if a booster is able to do 10 flights before such refurbishment. If they can't do as many as 10, then more details of refurbishment cost versus construction cost are likely needed than available to make such a decision.

Although they have said they will continue to fly Falcon for “as long as they have customers for it,” it sounds like they expect Starship-SuperHeavy to take over most of the launches in the coming years.
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crandles

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Re: SpaceX
« Reply #252 on: August 07, 2019, 04:30:24 PM »

Although they have said they will continue to fly Falcon for “as long as they have customers for it,” it sounds like they expect Starship-SuperHeavy to take over most of the launches in the coming years.

https://www.nasaspaceflight.com/2019/08/spacex-retesting-boosters-planning-starship-pad/

Quote
the report noted that SpaceX plans to launch the Starship/Super Heavy up to 24 times per year from LC-39A.
...
“SpaceX plans to increase the Falcon launch frequency to 20 launches per year from LC-39A and up to 50 launches per year from LC-40 by the year 2024,” added the report.

Sounds like quite a lot of launches expected before Starship/Super Heavy might cause Falcon to be retired.  ;)

Sigmetnow

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Re: SpaceX
« Reply #253 on: August 07, 2019, 06:58:51 PM »
...
Sounds like quite a lot of launches expected before Starship/Super Heavy might cause Falcon to be retired.  ;)

Yes.  My thought was simply that the past estimate of F9 boosters being used “up to 100 times, with major refurbishment” may no longer need to be tested.
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Sigmetnow

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Re: SpaceX
« Reply #254 on: August 08, 2019, 02:07:03 AM »
Not SpaceX but still very cool: ...

Chris B - NSF (@NASASpaceflight) 8/6/19, 6:15 PM
[Rocket Lab’s] Electron booster recovery via helicopter video.
https://twitter.com/nasaspaceflight/status/1158864269242445826
90-second video at the link animates their booster recovery plan.  I note they don’t show the (difficult!) booster “flip” maneuver, needed to put the flamey end in front to slow the rocket for reentry.

I love Rocket Lab’s new tech, and humor.  They seem to have found a lucrative niche as a small, innovative rocket company.  A complementary company to SpaceX, not a competitor.  Excellent article:
SpaceX’s Falcon 9 may soon have company as Rocket Lab reveals plans for Electron rocket reuse
Quote
In the world of aerospace, SpaceX is effectively the only private spaceflight company (or entity of any kind) able to launch, land, and reuse orbital-class rockets, although other companies and space agencies have also begun to seriously pursue similar capabilities. Rocket Lab’s announcement certainly brings newfound interest to the private rocket launch community. Reuse of launch vehicle boosters – typically the largest and most expensive portion of any given rocket – is a fundamental multiplier for launch cadence and can theoretically decrease launch costs under the right conditions.

Rocket Lab hopes, more than anything, that recoverability will lead to an increase in their launch frequency and – at a minimum – a doubling of the functional production capacity of the company’s established Electron factory space. This will allow for more innovation and give the company more opportunities to “change the industry and, quite frankly, change the world,” according to founder and CEO Peter Beck.

Unlike like SpaceX’s Falcon 9, propulsive landing is not an option for the small Electron rocket. In fact, cost-effective recovery and reuse of vehicles as small as Electron was believed to be so difficult that Beck long believed (and openly stated) that Rocket Lab would never attempt the feat. Beck claims that in order to land a rocket on its end propulsively – by using engines to slow the booster while it hurdles back to Earth in the way the Falcon 9 booster does – would mean that their small rocket would have to scale up into the medium class of rockets. As Beck stated, “We’re not in the business of building medium-sized launch vehicles. We’re in the business of building small launch vehicles for dedicated customers to get to orbit frequently.”
https://www.teslarati.com/spacex-falcon-9-company-rocket-lab-electron-reuse/
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Sigmetnow

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Re: SpaceX
« Reply #255 on: August 08, 2019, 03:23:44 PM »
SpaceX teases extreme Falcon 9 launch cadence goals in Starship planning doc
Quote
Published as part of an August 2019 environmental assessment (EA) draft for Starship’s prospective Pad 39A launch facilities, SpaceX revealed plans for a truly mindboggling number of annual Falcon 9 and Falcon Heavy launches by 2024.

As environmental planning documents, the figures should be taken with a large grain of salt and be treated as near-absolute ceilings rather than practical goals. Nevertheless, SpaceX revealed plans for its two Florida launch sites (LC-40 and LC-39A) to ultimately support as many as 70 annual launches of Falcon 9 and Heavy by 2024, less than five years from now.

Simply put, even the most dogmatic fan would have to balk at least a little bit at the numbers SpaceX suggested in its Starship EA draft. More specifically, SpaceX apparently has plans to support as many as 20 annual Falcon 9/Heavy launches from Pad 39A and an incredible 50 annual Falcon 9 launches from LC-40 as early as 2024.

“SpaceX plans to increase the Falcon launch frequency to 20 launches per year from LC-39A and up to 50 launches per year from LC-40 by the year 2024. However, as Starship/Super Heavy launches gradually increase to 24 launches per year, the number of launches of the Falcon would decrease.“
–SpaceX, Starship Environmental Assessment Draft, August 2019
...
Additionally, it can be almost unequivocally assumed that all but 15-20 of those supposed 70 annual launches would come from SpaceX’s own internal demand for Starlink launch capacity. Assuming no improvements between now and 2024, 50 Falcon 9 launches could place as many as 3000 Starlink satellites in orbit in a single year, equivalent to more than 25% of the entire proposed ~11,800-satellite constellation.
...
Ultimately, it’s unwise to draw any substantial conclusions from an Environmental Assessment like the one the above information has been taken from. This 39A-specific EA also ignores the possibility of a similar launch facility being developed in Boca Chica, Texas, which SpaceX explicitly acknowledges. ...
https://www.teslarati.com/spacex-falcon-9-extreme-launch-cadence-goals/
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Sigmetnow

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Re: SpaceX
« Reply #256 on: August 08, 2019, 08:56:36 PM »
Boca Chica scheduled road closures have been cancelled except for August 9!

——-
SpaceX Starship: Elon Musk’s Plan to Fly Around the Moon Is Taking Shape
The stainless steel juggernaut is set to fly soon.
August 8, 2019
Quote
Slowly but surely, Elon Musk’s plan to send a human around the moon is taking shape. New details shared on Wednesday explain how his firm SpaceX plans to use its existing test rocket to build the first iteration of its moon-bound vehicle, painting a picture of how the next few years may look.

SpaceX is currently working on the Starship, a towering beast of a vehicle expected to measure around 348 feet when fully complete. This machine will be used to send Japanese billionaire Yusaku Maezawa around the moon with six to eight artists, as part of a “Dear Moon” project that will encourage the participants to produce works around their experiences.

Videos and images suggest SpaceX is working overtime to complete tests at its Boca Chica launch facility in Texas. The “Starhopper,” a miniaturized version of the full vehicle, last month completed its first untethered hop test of a few meters, demonstrating the potential viability of both the planned full-size Starship and the groundbreaking Raptor engine set to fuel its journey.

“Hopper is set to be retired after the 200 meter hop,” Chris Bergin, editor at NASASpaceFlight, explained in a forum post Wednesday. “As a result it won’t be moved back from the LZ [landing zone] - it’ll be cannibalized for parts - as the pad will be prepared for Starship MkI. And that’s where it gets really exciting.”
...
https://www.inverse.com/amp/article/58404-spacex-starship-elon-musk-s-plan-to-fly-around-the-moon-is-taking-shape
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Sigmetnow

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Re: SpaceX
« Reply #257 on: August 09, 2019, 01:38:14 PM »
:o  Replying to the “teases” article above, Musk tweeted:

Elon Musk (@elonmusk) 8/8/19, 9:02 PM
@Teslarati Wouldn’t read too much into this. Likely to be fewer F9/FH flights, but possibly an order of magnitude more than these numbers in Starship flights.
https://twitter.com/elonmusk/status/1159630890026188800
   
< Elon, when will Starship Hopper's 200m test be?!
< Will it be tomorrow Aug 9 or Aug 19 the dates of road closures on the website are so far apart. Please let us know!
Elon Musk (@elonmusk) 8/8/19, 9:05 PM:  No sooner than a week. Working approvals with FAA.
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DrTskoul

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Re: SpaceX
« Reply #258 on: August 09, 2019, 01:42:43 PM »
If SpaceX were environmentally conscious,  the would be burning H2 not kerosene.

Sigmetnow

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Re: SpaceX
« Reply #259 on: August 10, 2019, 01:03:52 AM »
If SpaceX were environmentally conscious,  the would be burning H2 not kerosene.

Hydrogen is less dense than RP-1 or methane, requiring a bigger tank, making the rocket bigger which means more fuel / less payload / more rockets to do the same job.  Hydrogen’s boiling point of 20°K is crazy hard to maintain, and it causes liquid oxygen to freeze.  It’s more expensive to manufacture.  And adding water to the upper atmosphere has adverse consequences of its own.  Reusing rockets saves GHG — probably more than making and transporting multiple rockets that use H2 and are expended.
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Sigmetnow

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Re: SpaceX
« Reply #260 on: August 10, 2019, 01:19:27 AM »
Mary (@BocaChicaGal) 8/9/19, 6:13 PM
The new dates for SpaceX testing and beach/road closures are now on the Cameron County website. Hopefully we will see StarHopper's 200 meter hop on August 16th.
https://twitter.com/bocachicagal/status/1159950843074027525
Aug 16 (17, 18) 2pm to 12am

Edit:
< Starhopper 200m on Aug 16-18? ;)
https://twitter.com/bluemoondance74/status/1159968923300900866
Elon Musk:  Just spoke with FAA, so hopefully yes


====
SpaceXFleet Updates (@SpaceXFleet) 8/9/19, 6:50 PM
INTRODUCING....! GO Ms. Chief !!
[Ms]. Tree's sister ship has been renamed from Capt. Elliot to GO Ms. Chief and is en-route to Port Canaveral to join the SpaceX Fleet!
She will arrive at midnight tonight.
So.. @elonmusk... is this your plan for catching both fairing halves?
https://twitter.com/spacexfleet/status/1159960168320372737
Photos at the link.

< is Go Ms. Chief the sister to Go Ms. Tree? gonna get both halves soon?
Elon Musk:  Yup
Everyday Astronaut (@Erdayastronaut)
I can’t wait to see a booster come into port with two boats carrying two fairings someday. Oh man, wait until there’s a Falcon Heavy where everything but the upper stage is recovered and reused :o  that’ll be incredible!
Elon Musk:  For sure
« Last Edit: August 10, 2019, 01:30:08 AM by Sigmetnow »
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Sigmetnow

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Re: SpaceX
« Reply #261 on: August 11, 2019, 09:44:47 PM »
SpaceX’s first Crew Dragon NASA astronauts suit up for spacesuit-focused launch rehearsal
Quote
The suits are also designed to allow for easy maneuverability and a seamless user experience within the Dragon capsule. The attached gloves of the suit use conductive leather to allow the astronauts to interact with the Crew Dragon’s primary controls, a set of large touchscreens. Apple iPads will additionally be mounted directly on the thighs of the astronauts to serve as an even more convenient (and redundant) method of interfacing with Dragon’s controls, among other things. ...
https://www.teslarati.com/spacex-crew-dragon-nasa-astronauts-spacesuit-rehearsal/
Image below: NASA Commercial Crew astronaut Suni Williams tests SpaceX’s Crew Dragon display controls in April 2018. (NASA/SpaceX)
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vox_mundi

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Re: SpaceX
« Reply #262 on: August 12, 2019, 03:30:11 PM »
Quote
....  The attached gloves of the suit use conductive leather to allow the astronauts to interact with the Crew Dragon’s primary controls, a set of large touchscreens. Apple iPads will additionally be mounted directly on the thighs of the astronauts to serve as an even more convenient (and redundant) method of interfacing with Dragon’s controls, among other things... (both touchscreens)

Just an observation from the 'lessons-learned' department ...

Navy Reverting DDGs Back to Physical Throttles, After Fleet Rejects Touchscreen Controls
https://news.usni.org/2019/08/09/navy-reverting-ddgs-back-to-physical-throttles-after-fleet-rejects-touchscreen-controls

SAN DIEGO – The Navy will begin reverting destroyers back to a physical throttle and traditional helm control system in the next 18 to 24 months, after the fleet overwhelmingly said they prefer mechanical controls to touchscreen systems in the aftermath of the fatal USS John S. McCain (DDG-56) collision.

The investigation into the collision showed that a touchscreen system that was complex and that sailors had been poorly trained to use contributed to a loss of control of the ship just before it crossed paths with a merchant ship in the Singapore Strait

“When we started getting the feedback from the fleet from the Comprehensive Review effort ... it was really eye-opening. And it goes into the, in my mind, ‘just because you can doesn’t mean you should’ category. We really made the helm control system, specifically on the [DDG] 51 class, just overly complex, with the touch screens under glass and all this kind of stuff,” Galinis said during a keynote speech at the American Society of Naval Engineers’ annual Fleet Maintenance and Modernization Symposium.

... As a result of innovation and a desire to incorporate new technology, “we got away from the physical throttles, and that was probably the number-one feedback from the fleet – they said, just give us the throttles that we can use.”

---------------------

... or we can wait for a post-crash investigation to make the same recommendation.
« Last Edit: August 12, 2019, 04:05:31 PM by vox_mundi »
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Sigmetnow

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Re: SpaceX
« Reply #263 on: August 12, 2019, 05:30:59 PM »
Quote
...
We really made the helm control system, specifically on the [DDG] 51 class, just overly complex, with the touch screens under glass and all this kind of stuff,” ...

... As a result of innovation and a desire to incorporate new technology, “we got away from the physical throttles, and that was probably the number-one feedback from the fleet – they said, just give us the throttles that we can use.”

The astronauts who will use Dragon have been involved with its design from early on, and understand the workings intimately, so “complexity” should not be a problem.  It was also at their suggestion that SpaceX added certain “manual” controls, in addition to all the automated ones, because astronauts wanted backup switches for crucial systems in case everything went dark.

One downside to physical controls is that they can be bumped accidentally, and this is all the more likely in a tiny space capsule when one is in weightlessness or pulling multiple G’s in various directions, and wearing a bulky spacesuit and things might be floating around.  (Although SpaceX suits look positively slimming, compared to others. ;) )  Of course, another benefit is that touchscreen controls can be updated easily for new functions — or a new layout, if they find that “buttons” should be bigger or would be better in a different location on the screen.
« Last Edit: August 12, 2019, 05:36:13 PM by Sigmetnow »
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vox_mundi

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Re: SpaceX
« Reply #264 on: August 12, 2019, 05:41:08 PM »
Upgrades! ...  :)

“There are three classes of people: those who see. Those who see when they are shown. Those who do not see.” ― Leonardo da Vinci

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Sigmetnow

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Re: SpaceX
« Reply #265 on: August 12, 2019, 06:04:24 PM »
Upgrades! ...  :)


 ;D  But watch the inertial dampeners on the starboard nacelle....

I meant to add, above, that Col. Bob Behnken and Col. Doug Hurley are former flight engineers/ test pilots, as are most of the NASA pilots.  They’ve both piloted the Space Shuttle.
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TerryM

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Re: SpaceX
« Reply #266 on: August 12, 2019, 07:06:33 PM »
Ouch!


Redundancy is something I'm generally in favor of, redundancy in controls I'm generally against.


If one control says "increase Speed" while the other says "decrease speed" what is the vehicle to do.


If one control says "fire starboard thrusters" while the other says "fire port thrusters" what happens next?


Think of the problems Boeing is facing today.
One set of controls responds to the helm while another set of controls over-rides the helm and the airplane ends up falling from the sky. The lawsuits are adding up. The planes are still grounded. Customers are cancelling their orders.
It was all in an attempt to save money.


Another quibble.
With Tesla Musk installed non automotive grade screens which turn yellow over time - a cost saving move that is costing the company both in repair/replace costs and in terms of customer satisfaction.
With Spacex Musk is installing I-Phones as redundant controls. I-Phones are not rocket grade components. While cheap to incorporate in the design, their internal components are not designed for, nor have they been vetted for operations in space.
If they should act up it could be much more serious than a yellow band around the screen.


Spacex's greatest claim to fame is that they are cheap.
Going cheap with manned spacecraft may prove to be a flawed philosophy.
Going cheap on controls may prove very costly error.


Not a cheap shot - the risks are real
Terry


Sigmetnow

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Re: SpaceX
« Reply #267 on: August 13, 2019, 12:16:24 AM »
A)  it’s iPads, not iPhones.
B) iPads have been used on the International Space Station for years.  They went through a two-year cetification process. And I doubt they are cheap, nor off-the-shelf models.

https://space.stackexchange.com/questions/21493/how-do-ipads-on-the-iss-know-which-way-is-up-for-their-users
« Last Edit: August 13, 2019, 12:28:39 AM by Sigmetnow »
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Sigmetnow

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Re: SpaceX
« Reply #268 on: August 13, 2019, 12:21:01 AM »
Comparing Orion capsule control panel (top) to Dragon capsule control panel (bottom). 
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TerryM

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Re: SpaceX
« Reply #269 on: August 13, 2019, 04:55:46 AM »
A)  it’s iPads, not iPhones.
B) iPads have been used on the International Space Station for years.  They went through a two-year cetification process. And I doubt they are cheap, nor off-the-shelf models.

https://space.stackexchange.com/questions/21493/how-do-ipads-on-the-iss-know-which-way-is-up-for-their-users
My Bad
You wrote IPad, I read IPhone.


Are they part of the control system of the ISS?
I had no idea that an Apple product could stand the vibration, the G-forces or the radiation.


Are they still manufactured in China?
Come to think of it the ISS is an International Space Station, I'd assume it has plenty of Russian and Chinese manufactured components. (Trump probably isn't too pleased with that)


Anyway it's the IPhone I've an issue with - not the other Apple products. :)
Terry

Sigmetnow

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Re: SpaceX
« Reply #270 on: August 13, 2019, 03:59:36 PM »
Many different laptop computers have been used aboard the ISS.  They are mainly used in conjunction with the experiments the astronauts work on.

https://www.techrepublic.com/pictures/photos-from-the-thinkpad-to-the-ipad-the-tech-used-on-the-iss/11/

Tablets are handy to replace the traditional bound paper instructions and checklists.  It would make sense for NASA to upload new data for the astronauts to them, as well.  I don’t know the extent of the control, if any, the tablets may have over pure station functions — but NASA has to sign off on anything SpaceX does with the Dragon, so they must have already tested and approved such use.

By the way, NASA has approved an iPhone or two for use in the ISS, as well. ;)
« Last Edit: August 13, 2019, 04:06:06 PM by Sigmetnow »
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Sigmetnow

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Re: SpaceX
« Reply #271 on: August 13, 2019, 04:21:15 PM »
SpaceX adds new ship to fleet after fairing catcher Ms. Tree nails second recovery in a row
Quote
In a telltale sign that SpaceX is growing much more confident in its ability to consistently recover Falcon 9 fairings, the company has accepted delivery of second recovery ship almost identical to GO Ms. Tree (formerly Mr. Steven) just days after nailing its second fairing catch in a row.

Previously known as M/V Captain Elliott, the new ship appears to have been acquired by Guice Offshore (GO) from struggling marine services company Seatran Marine just like Mr. Steven, likely also leaning on some sort of financial arrangement with SpaceX. Regardless, the spaceflight company now has a pair of Port Canaveral-based fairing recovery ships in hand – named Ms. Tree and Ms. Chief – and is thus making excellent progress towards catching and reusing both halves of the same Falcon 9 (or Heavy) fairing. ...
https://www.teslarati.com/spacex-ms-tree-catch-second-fairing-recovery-ship/

——
Edit:  Best job description ever!
Job Application for Fairing Recovery Engineer at SpaceX
Quote
Fairing Recovery Engineer
Cape Canaveral, FL, United States
SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars.
RECOVERY ENGINEER (FAIRING)
Have you ever wanted to catch something falling out of the sky ... with a net ... on a boat ... that's moving? Well, this is your chance to take on one of the most unique engineering challenges SpaceX is currently tackling. ...
https://boards.greenhouse.io/spacex/jobs/4376270002?gh_jid=4376270002

H/t  https://twitter.com/spacexfleet/status/1161339555422855168

——-
Below:  Ms. Chief (right) is likely about to become an almost identical twin to fairing recovery vessel Ms. Tree (formerly Mr. Steven). (SpaceX, Gulf Craft, LLC)
« Last Edit: August 13, 2019, 08:37:51 PM by Sigmetnow »
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Sigmetnow

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Re: SpaceX
« Reply #272 on: August 18, 2019, 10:01:33 PM »
At the first link:  Cool 30-second time lapse of SpaceX autonomous drone ship Just Read The Instructions being pushed down the Panama Canal lock by tug Alice C, who is bringing her from the west coast to join the fleet in Florida.  SpaceX currently does not have any launches scheduled at Vandenburg, California until late next year, but missions from Florida are expected to increase, and it can take days for a drone ship that catches a booster to make the trip back to shore, so having an additional ship in FL will be handy.

Quote
SpaceXFleet Updates (@SpaceXFleet)8/18/19, 9:10 AM
Just Read the Instructions has entered the Miraflores locks, as she leaves the Pacific Ocean after 4 years of service out of Los Angeles.
The droneship wing extensions have been detached so it can fit through the Panama Canal locks

Oswaldo Sira (@Oswaldo_S28) 8/18/19, 10:29 AM
@SpaceXFleet 3min ago
https://twitter.com/oswaldo_s28/status/1163095469289066496
30sec time lapse at the link, of JRTI entering view and moving on down the lock.

Quote
SpaceXFleet Updates (@SpaceXFleet) 8/18/19, 9:10 AM
...
Many thanks to @Oswaldo_S28 for the photo!
https://twitter.com/spacexfleet/status/1163075611713331200
Photo below.
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