Author Topic: SpaceX Falcon 9 - EchoStar 23 - March 16, 2017 - DISCUSSION  (Read 1995190 times)

Offline cscott

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It may be that some recovered "block 4" stages are refurbished into block 5 falcons.  Or it may be that launch pace is too important and/or the cost of properly refurbishing a block 4 is so high that they will throw the block 4s away. 

According to an employee, there's no cost effective way to retrofit a stage from one Block to another.
Not disagreeing.  I was just pointing out that there were a number of other things you might do with a recovered block 4 falcon besides launching it and throwing it into the ocean when you were done.  Aggressive landing tests, destructive structural testing on multiply-recovered cores, recovery/refurbishment experiments (even "not cost effective" ones, so long as you learn something you were interested in), more monuments in front of SpaceX facilities, etc etc.
« Last Edit: 01/23/2017 04:49 pm by cscott »

Offline RonM

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Neat, but it had landing skids...

If a plane is modified in such a way it can't land in order to achieve some performance metric, then great, by nobody would claim that this is what the plane can really do.

Landing is considered part of the flight profile.

Well if you want the first reuse after a vertical flight and landing, I guess the winner would be Mercury-Redstone 1 with it's four inch flight.

MR-1 was never used for another flight after its return to Huntsville. It was eventually put on display at the Space Orientation Center of Marshall Space Flight Center.

Yes. This kind of confusion occurs when the rocket designation and the flight designation are the same. Same problem with keeping track of which F9 first stage is being used on a F9 launch.

SpaceX has different flight and rocket designations.

Ok, but people have a bad tendency to only use the last two digits. What are the full designations?

Offline gongora

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Yes. This kind of confusion occurs when the rocket designation and the flight designation are the same. Same problem with keeping track of which F9 first stage is being used on a F9 launch.

SpaceX has different flight and rocket designations.

Ok, but people have a bad tendency to only use the last two digits. What are the full designations?

1021 would be a first stage serial number.  F9-23 would be a flight designation.  For the reflight, I think the booster serial number is something like 1021-2?  The flight designation is F9-33.  What we should put on the manifest is up to Starhawk92  :)  (Those would be numbers for the CRS-8/SES-10 booster).
« Last Edit: 01/23/2017 04:59 pm by gongora »

Offline Johnnyhinbos

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Yes. This kind of confusion occurs when the rocket designation and the flight designation are the same. Same problem with keeping track of which F9 first stage is being used on a F9 launch.

SpaceX has different flight and rocket designations.

Ok, but people have a bad tendency to only use the last two digits. What are the full designations?

1021 would be a first stage serial number.  F9-23 would be a flight designation.  For the reflight, I think the booster serial number is something like 1021-2?  The flight designation is F9-33.  What we should put on the manifest is up to Starhawk92  :)  (Those would be numbers for the CRS-8/SES-10 booster).
Serial number should be immutable. 1021 will always be 1021
John Hanzl. Author, action / adventure www.johnhanzl.com

Offline old_sellsword

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Yes. This kind of confusion occurs when the rocket designation and the flight designation are the same. Same problem with keeping track of which F9 first stage is being used on a F9 launch.

SpaceX has different flight and rocket designations.

Ok, but people have a bad tendency to only use the last two digits. What are the full designations?

1021 would be a first stage serial number.  F9-23 would be a flight designation.  For the reflight, I think the booster serial number is something like 1021-2?  The flight designation is F9-33.  What we should put on the manifest is up to Starhawk92  :)  (Those would be numbers for the CRS-8/SES-10 booster).
Serial number should be immutable. 1021 will always be 1021

Serial numbers are immutable, the 1XXX part never changes. The 1XXX-X format is a way for tracking that stage's flights. It's official, in case you think we just made that up.
« Last Edit: 01/23/2017 05:16 pm by old_sellsword »

Offline inonepiece

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1021 would be a first stage serial number.  F9-23 would be a flight designation.  For the reflight, I think the booster serial number is something like 1021-2?  The flight designation is F9-33.  What we should put on the manifest is up to Starhawk92  :)  (Those would be numbers for the CRS-8/SES-10 booster).
Serial number should be immutable. 1021 will always be 1021

Serial numbers are immutable, the 1XXX part never changes. The 1XXX-X format is a way for tracking that stage's flights. It's official, in case you think we just made that up.
Sure. Whatever they (SpaceX) call it, though, objectively the thing that 1XXX-X is numbering is a flight, not a stage.

Online Comga

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Sure. Whatever they (SpaceX) call it, though, objectively the thing that 1XXX-X is numbering is a flight, not a stage.
That is incorrect, not specific to this Echostar launch, and has been more than thoroughly hashed out.
Can we give it a rest?
« Last Edit: 01/25/2017 01:40 am by gongora »
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Online Robotbeat

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Can we unmangle our quotes? :)

Edit: thanks gongora . :)
« Last Edit: 01/25/2017 05:29 am by Robotbeat »
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Offline jaufgang

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New Gizmodo article about upcoming launches and recommissioning of LC39A quotes Chris Bergin of NasaSpaceflight in the last 2 paragraphs. 

http://gizmodo.com/why-space-fanatics-are-freaking-out-about-spacexs-next-1790518408

Offline DOCinCT

Pic:

https://twitter.com/Markos_pen/status/824705175344607235

Big white TEL could easily be mistaken as the F9 from a distance.
Chris what is the other structure (inverted L shape)?

Online Chris Bergin

Pic:

https://twitter.com/Markos_pen/status/824705175344607235

Big white TEL could easily be mistaken as the F9 from a distance.
Chris what is the other structure (inverted L shape)?


On the right? That's a rather large crane :)
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Online Lee Jay

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Specifically, it's a crane with a luffing jib installed and with the jib in the down position, sort of like this.

Online Robotbeat

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That crane has been there a while. Here's a pic I took of it in May of last year:
Chris  Whoever loves correction loves knowledge, but he who hates reproof is stupid.

To the maximum extent practicable, the Federal Government shall plan missions to accommodate the space transportation services capabilities of United States commercial providers. US law http://goo.gl/YZYNt0

Offline CyndyC

New Gizmodo article about upcoming launches and recommissioning of LC39A quotes Chris Bergin of NasaSpaceflight in the last 2 paragraphs. 

http://gizmodo.com/why-space-fanatics-are-freaking-out-about-spacexs-next-1790518408

Quote
Also, it’s SpaceX, they are—without question—the rock stars of space flight these days. Combining the history of 39A with SpaceX is a perfect storm of joy for rocket fans.

Not that Chris's point doesn't have impact on its own, and not to pick on Chris himself by any means, but analogies using The Perfect Storm are often foreshortened. The original event was the result of 3 weather systems, not 2. I think that's important to understand in other parts of life as well.
"Either lead, follow, or get out of the way." -- quote of debatable origin tweeted by Ted Turner and previously seen on his desk

Offline Space Ghost 1962

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Are we closing in on on 39A fit checks finally? Or have I missed something?

Online launchwatcher

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Are we closing in on on 39A fit checks finally? Or have I missed something?
Looks like the strongback is up in these photos:

https://twitter.com/scriptunasphoto/status/824741563611885569

Online Comga

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Are we closing in on on 39A fit checks finally? Or have I missed something?
Looks like the strongback is up in these photos:

https://twitter.com/scriptunasphoto/status/824741563611885569
But definitely NOT the rocket.
That was not resolvable in the photo in the Updates thread.
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline Johnnyhinbos

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Are we closing in on on 39A fit checks finally? Or have I missed something?
Looks like the strongback is up in these photos:

https://twitter.com/scriptunasphoto/status/824741563611885569
And that thing is a beast! I can not wait for six months from now!
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Offline Mike_1179

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Are we closing in on on 39A fit checks finally? Or have I missed something?

Question about how the pad interfaces with the vehicle. Do the pad utilities (LOX, He, RP-1, HVAC) connect directly to the vehicle or do they connect to the TEL only. If they connect to the TEL, then there must be another set of connections between the TEL and the vehicle itself, right?

So I guess my question is, do you have to do two sets of fit-checks: pad to TEL and then TEL to vehicle? How do you perform these fit checks without cryo-loading since the stage and TEL would change shape as they cooled, right?

Offline Jim

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So I guess my question is, do you have to do two sets of fit-checks: pad to TEL and then TEL to vehicle? How do you perform these fit checks without cryo-loading since the stage and TEL would change shape as they cooled, right?

the pad utilities can still be flowed into the TEL without a vehicle.  Most goes into tail service masts.  Only second stage services go up the mast. The TEL doesn't have to be erected to perform most of the testing. AC, gases, data/telemetry, power, etc can be flowed while horizontal.   That just leaves LOX and RP-1 and likely they will be flowed while horizontal.  Just need some kind of "catch bucket" at the umbilical carrier interfaces.

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