Author Topic: SpaceX Falcon 9 : GovSat-1 (SES-16) : Jan 31. 2018 - Discussion  (Read 213370 times)

Offline pb2000

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Yes, it appears a “toasty” landing might be successful. It seems SpaceX wishes to expend this booster. The reasons seem obvious, they are running out of room for stored boosters and have block 5s on the way. Why stick on the landing legs? Why are they cleaned? We are curious about the answer.
I provided plausible answers to those questions up-thread, but in any event, the launch/webcast is mere hours away, so I'm sure we'll get more definitive answers then.
Launches attended: Worldview-4 (Atlas V 401), Iridium NEXT Flight 1 (Falcon 9 FT), PAZ+Starlink (Falcon 9 FT), Arabsat-6A (Falcon Heavy)
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Offline John Alan

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Speculate
They had already had the mission patches made up and then it was decided to ditch the bird...
Well... clean up a set of used legs and throw em on...
Problem solved...  ;)
(They likely clean them checking for cracks post flight anyway)
« Last Edit: 01/31/2018 04:38 pm by John Alan »

Offline envy887

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Speculate
They had already had the mission patches made up and then it was decided to ditch the bird...
Well... clean up a set of used legs and throw em on...
Problem solved...  ;)
(They likely clean them checking for cracks post flight anyway)

The last Iridium flight had legs on the patch but no legs on the booster, so obviously this doesn't bother SpaceX.

Offline Nomadd

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Yes, it appears a “toasty” landing might be successful. It seems SpaceX wishes to expend this booster. The reasons seem obvious, they are running out of room for stored boosters and have block 5s on the way. Why stick on the landing legs? Why are they cleaned? We are curious about the answer.
There are probably surplus, old model legs they don't need and it would be a good chance to test some things, like deploying the legs earlier.
Those who danced were thought to be quite insane by those who couldn't hear the music.

Offline Elthiryel

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Speculate
They had already had the mission patches made up and then it was decided to ditch the bird...
Well... clean up a set of used legs and throw em on...
Problem solved...  ;)
(They likely clean them checking for cracks post flight anyway)

The last Iridium flight had legs on the patch but no legs on the booster, so obviously this doesn't bother SpaceX.

This is not true, there are no legs on the Iridium-4 patch. Anyway, I don't think this is the reason.
« Last Edit: 01/31/2018 05:08 pm by Elthiryel »
GO for launch, GO for age of reflight

Offline Norm38

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That patch is also firing all engines after stage separation.  So the patches have a fair degree of artistic license. 

Offline CuddlyRocket

Why stick on the landing legs? Why are they cleaned? We are curious about the answer.

They may not be cleaned; they could be new legs! Perhaps they're testing a different design or different materials?

Offline envy887

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Speculate
They had already had the mission patches made up and then it was decided to ditch the bird...
Well... clean up a set of used legs and throw em on...
Problem solved...  ;)
(They likely clean them checking for cracks post flight anyway)

The last Iridium flight had legs on the patch but no legs on the booster, so obviously this doesn't bother SpaceX.

This is not true, there are no legs on the Iridium-4 patch. Anyway, I don't think this is the reason.

I thought I saw one with legs, but it seems like I misremembered. The Iridium patch doesn't show the booster at all.. At any rate, it's definitely not the reason.

Offline joertexas

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Someone posted a picture of both Falcon 9 and FH on the pads. I had an old picture saved that I combined with the new one. These aren't my pictures - I just put them together.


Offline king1999

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Someone posted a picture of both Falcon 9 and FH on the pads. I had an old picture saved that I combined with the new one. These aren't my pictures - I just put them together.

The double shuttle picture was obviously a photoshop job. Not much meaning to compare these two pictures.

Offline envy887

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Someone posted a picture of both Falcon 9 and FH on the pads. I had an old picture saved that I combined with the new one. These aren't my pictures - I just put them together.

Were there ever 2 shuttles and a third rocket rolled out at once? Maybe a Titan, Atlas, or Delta?

Online drnscr

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Someone posted a picture of both Falcon 9 and FH on the pads. I had an old picture saved that I combined with the new one. These aren't my pictures - I just put them together.

The double shuttle picture was obviously a photoshop job. Not much meaning to compare these two pictures.

No, not a photoshop job... this was taken during the flow for STS-125 which required the LON vehicle to be on LC39-B simultaneously.

Offline Joffan

Pre-webcast track from Testshot Starfish is called "Flight Proven".  :-)
Getting through max-Q for humanity becoming fully spacefaring

Offline Lar

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Either the expended booster came on such short notice so they left the legs on for more testing, or they want to burn the old legs in advance of block V along with the fins.
In the latter case, why not just sell them for scrap?

A few things on the configuration of B1032.2 for today's launch:

1. This was planned to be expendable for some time.
2. FH's pending need for the ASDS has nothing to do with B1032.2 being expendable.
3. It has landing legs and grid fins because, while they are expending it, they don't want to just throw a perfectly good test article away without gathering data.
4. This is being treated as a landing to continue to gather data and refine the landing algorithms the F9 computer systems use to land the boosters.

Why do you need to speculate?
I'd even count the post above as an update.

You're new around here, aren't you? We LOVE to speculate. Besides, we moved on from that stuff and are now on "which legs are they? new design? old design? used?"....

Further I doubt the webcast will answer that. We're geekier than they are.
"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 joertexas

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Someone posted a picture of both Falcon 9 and FH on the pads. I had an old picture saved that I combined with the new one. These aren't my pictures - I just put them together.

The double shuttle picture was obviously a photoshop job. Not much meaning to compare these two pictures.

Now, that's a really interesting observation - on what are you basing it? Helpful hint - it's real.

Offline Jim

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Someone posted a picture of both Falcon 9 and FH on the pads. I had an old picture saved that I combined with the new one. These aren't my pictures - I just put them together.

Were there ever 2 shuttles and a third rocket rolled out at once? Maybe a Titan, Atlas, or Delta?

2 Delta II's, 2 Atlas II's, Titan IV, and Shuttle were all on the pads at once in the 90's

Offline Jim

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Someone posted a picture of both Falcon 9 and FH on the pads. I had an old picture saved that I combined with the new one. These aren't my pictures - I just put them together.

The double shuttle picture was obviously a photoshop job. Not much meaning to compare these two pictures.

That is wrong

Offline NWade

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Anyone else see what looked like gas venting from the separated fairing as it fell past the rear of S2?  Lends some credence to the rumors/speculation about more recovery testing with the fairings on this flight?
 
--Noel

Offline Ictogan

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Note that the call "Recovery vessel has AOS" was made over the net shortly before stage separation.  No first stage recovery on this one, so this is either a dry run or something else.
Perhaps related to fairing recovery?

Offline Terra Incognita

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During the webcast I hear "recovery vessel AOS" but they aren't planning to recover this booster.

Was this the fairing recovery vessel?

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