parapente
Posts: 2563
Joined: Tue Mar 28, 2006 10:42 pm

Re: SpaceX - Tests, Launches, Developments

Wed Jul 11, 2018 12:28 pm

https://www.teslarati.com/spacex-mr-ste ... -size-net/

Omg that's just crazy! Well actually it's probably not.Hope this works for them it looks -well a little 'Heath robinson' but who cares.
I notes on an earlier post on the same site that an inflatable raft was also seen.I wonder if this is the 'bouncy castle' Elon referred to re capturing the second stage?
 
GST
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Joined: Wed Jun 11, 2008 10:27 am

Re: SpaceX - Tests, Launches, Developments

Wed Jul 11, 2018 4:43 pm

That's a funky looking boat. I'm guessing that this is so that they can catch 2 fairings on thee net and not need a 2nd boat. Have one aim for the left side of the net and the other for the right.

It is such a huge increase in area, I wonder if that is in part so that the approach paths are entirely abeam of the ship, with sufficient lateral comfort margin that if either fairing overshoots the net it can only drop in the sea adjacent or diagonally ahead of the boat. A fairing approaching along the ship's longitudinal axis then overshooting might otherwise drop onto the wheel-house (depending upon net geometry) or near in-front of the boat and be a high collision risk. I'm sure they've thought of these cases and hardened the ship against them if there is any perceived risk of damage, but it is better avoided entirely.
 
aviationaware
Posts: 1910
Joined: Mon May 19, 2014 12:02 pm

Re: SpaceX - Tests, Launches, Developments

Sat Jul 14, 2018 12:20 pm

Isn't there a danger of the ship capsizing if the fairing comes in at the edge of the net? Not sure how much a fairing weighs and how much force it lands with...
 
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JetBuddy
Posts: 1950
Joined: Wed Dec 25, 2013 1:04 am

Re: SpaceX - Tests, Launches, Developments

Sat Jul 14, 2018 6:06 pm

aviationaware wrote:
Isn't there a danger of the ship capsizing if the fairing comes in at the edge of the net? Not sure how much a fairing weighs and how much force it lands with...


I really doubt it will have much impact on the vessel. It seems like a large and sturdy ship. In the past I've wondered what would happen if the fairing missed and hit the bridge of the ship, but the new net seems to cover the entire ship.
 
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AirlineCritic
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Joined: Sat Mar 14, 2009 1:07 pm

Re: SpaceX - Tests, Launches, Developments

Sun Jul 15, 2018 10:50 am

(a) It is a ship. They are heavy. (b) The fairing is a component from a space vehichle. They are lightweight by design.
 
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Nomadd
Posts: 71
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Re: SpaceX - Tests, Launches, Developments

Sun Jul 15, 2018 9:27 pm

With as much leverage as hitting the edge of the net would have and the likelihood of the ship being lightly ballasted and fueled for the best possible maneuverability and acceleration, you'll know when the fairing hits the edge, but it will just be a small rudder correction to keep things perfectly level.
 
aviationaware
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Re: SpaceX - Tests, Launches, Developments

Mon Jul 16, 2018 2:41 pm

Ok, like I said no idea how much the fairing weighs and very limited knowledge of maritime engineering (none). Just thought that the ship might become imbalanced if the fairing hits, but I guess smarter people than myself designed that ship and considered all obvious eventualities. Would love to see feed from Mr. Steven some time though, always thought it was a pity that there wasn't any.
 
DarkKnight5
Posts: 45
Joined: Fri Apr 15, 2016 3:36 pm

Re: SpaceX - Tests, Launches, Developments

Mon Jul 16, 2018 3:43 pm

aviationaware wrote:
Ok, like I said no idea how much the fairing weighs and very limited knowledge of maritime engineering (none). Just thought that the ship might become imbalanced if the fairing hits, but I guess smarter people than myself designed that ship and considered all obvious eventualities. Would love to see feed from Mr. Steven some time though, always thought it was a pity that there wasn't any.

In a recent launch there was a Mr. S. feed visible in the launch control room. Looked like it was taken by a drone flying in front of the boat. I’m sure when they finally catch one the video will be available shortly after. Once they get good at it, it’ll be part of the launch broadcast.
 
DarkKnight5
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Re: SpaceX - Tests, Launches, Developments

Tue Jul 17, 2018 2:29 pm

@Nomadd you’re famous!!!

https://greatlakesledger.com/2018/07/16/spacex-prepares-to-test-the-space-x-bfr-and-bfs/
“An immense liquid oxygen (LOX) tank just arrived at @SpaceX’s prospective Boca Chica, TX facility, likely to be dedicated to BFR & BFS testing. @NASASpaceflight forum user “Nomadd” caught some of the first detailed photos, as well as the tank’s arrival at SpaceX land on July 11,” tweeted Eric Ralph.
 
DarkKnight5
Posts: 45
Joined: Fri Apr 15, 2016 3:36 pm

Re: SpaceX - Tests, Launches, Developments

Wed Jul 18, 2018 2:16 pm

Mr. Steven sea trials video with the new net setup:

http://youtu.be/VlCO7gBXWNA
 
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JetBuddy
Posts: 1950
Joined: Wed Dec 25, 2013 1:04 am

Re: SpaceX - Tests, Launches, Developments

Wed Jul 18, 2018 10:28 pm

DarkKnight5 wrote:
Mr. Steven sea trials video with the new net setup:

http://youtu.be/VlCO7gBXWNA


Wow that looks very manoeuvrable. The net still doesn't cover the bridge and bow of the ship though. So far the fairing has missed the net by some distance. What if it hits the bridge?
 
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Francoflier
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Re: SpaceX - Tests, Launches, Developments

Thu Jul 19, 2018 7:11 am

JetBuddy wrote:
DarkKnight5 wrote:
Mr. Steven sea trials video with the new net setup:

http://youtu.be/VlCO7gBXWNA


Wow that looks very manoeuvrable. The net still doesn't cover the bridge and bow of the ship though. So far the fairing has missed the net by some distance. What if it hits the bridge?


Lightweight space-grade carbon fibre against heavy duty ship-grade steel... It'll be another smashed fairing vs. a small dent and a lick of paint on the boat.
:wink2:
I'm guessing the crew stays inside during the recovery maneuver.

Presumably, this wider net also comes with an improved guidance system for the fairing chute, as the net area increase in itself would not be sufficient.
We're getting close.
I'll do my own airline. With Blackjack. And hookers. In fact, forget the airline.
 
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JetBuddy
Posts: 1950
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Re: SpaceX - Tests, Launches, Developments

Thu Jul 19, 2018 12:46 pm

Francoflier wrote:
Lightweight space-grade carbon fibre against heavy duty ship-grade steel... It'll be another smashed fairing vs. a small dent and a lick of paint on the boat.
:wink2:
I'm guessing the crew stays inside during the recovery maneuver.

Presumably, this wider net also comes with an improved guidance system for the fairing chute, as the net area increase in itself would not be sufficient.
We're getting close.


There are radars and other antennae on the bridge area. The damage to those would be inconvenient. And the fairing would be toast as well. But there's probably a reason they haven't stretched the net even further.

Like you mentioned, the improved guidance system will probably be enough to make it work.
 
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Nomadd
Posts: 71
Joined: Sat Dec 09, 2017 3:26 pm

Re: SpaceX - Tests, Launches, Developments

Thu Jul 19, 2018 2:13 pm

DarkKnight5 wrote:
@Nomadd you’re famous!!!

https://greatlakesledger.com/2018/07/16/spacex-prepares-to-test-the-space-x-bfr-and-bfs/
“An immense liquid oxygen (LOX) tank just arrived at @SpaceX’s prospective Boca Chica, TX facility, likely to be dedicated to BFR & BFS testing. @NASASpaceflight forum user “Nomadd” caught some of the first detailed photos, as well as the tank’s arrival at SpaceX land on July 11,” tweeted Eric Ralph.

It wasn't hard to "catch" some photos. It's sitting about 200 feet from my front door.

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