Author Topic: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD  (Read 611265 times)

Offline Jim

  • Night Gator
  • Senior Member
  • *****
  • Posts: 37818
  • Cape Canaveral Spaceport
  • Liked: 22048
  • Likes Given: 430
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #840 on: 12/02/2013 05:12 pm »
I'm just immensely impressed that they can, in a span of only three days, rip out the gas generators of all nine engines, Clean&inspect then, re-mount them back on to their engines and wrap up the whole checkout of the rocket.
.
Especially considering that this would be only one of a great many actions that they need to be prepared to do at virtually zero notice.
.
Plus they did it over thanksgiving weekend.
.
Impressive.


Only one was
If they redesigned Falcon 9 for reusability, that means maintenance must be simple and lots of small changes can be made on the pad.


It went horizontal

Offline ww2planes1

  • Member
  • Posts: 16
  • Liked: 1
  • Likes Given: 1
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #841 on: 12/02/2013 05:16 pm »
It went horizontal

Actually no it didn't.  For the vast majority of the time the last few days, the rocket remained vertical on the pad

Offline Avron

  • Canadian Member
  • Senior Member
  • *****
  • Posts: 4930
  • Liked: 156
  • Likes Given: 160
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #842 on: 12/02/2013 05:20 pm »
It went horizontal

Actually no it didn't.  For the vast majority of the time the last few days, the rocket remained vertical on the pad

Jim may be able to see it.

Offline Lars_J

  • Senior Member
  • *****
  • Posts: 6160
  • California
  • Liked: 677
  • Likes Given: 195
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #843 on: 12/02/2013 06:08 pm »
It went horizontal

Actually no it didn't.  For the vast majority of the time the last few days, the rocket remained vertical on the pad

A silly thing to say... You just contradicted yourself. We know the rocket went horizontal at least once since the first launch attempt. (perhaps even twice)

Offline ww2planes1

  • Member
  • Posts: 16
  • Liked: 1
  • Likes Given: 1
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #844 on: 12/02/2013 06:17 pm »
It went horizontal

Actually no it didn't.  For the vast majority of the time the last few days, the rocket remained vertical on the pad

A silly thing to say... You just contradicted yourself. We know the rocket went horizontal at least once since the first launch attempt. (perhaps even twice)

Yeah, sorry.  That wasn't as well phrased as it should've been.

Yes, the rocket went horizontal after the first attempt.  However, between the second attempt on Thanksgiving and today, every time I saw it, the rocket was vertical on the pad. 

Offline Garrett

  • Full Member
  • ****
  • Posts: 1134
  • France
  • Liked: 128
  • Likes Given: 114
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #845 on: 12/02/2013 08:52 pm »
However, between the second attempt on Thanksgiving and today, every time I saw it, the rocket was vertical on the pad. 
Are you at the Cape?
- "Nothing shocks me. I'm a scientist." - Indiana Jones

Offline ww2planes1

  • Member
  • Posts: 16
  • Liked: 1
  • Likes Given: 1
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #846 on: 12/02/2013 09:01 pm »
However, between the second attempt on Thanksgiving and today, every time I saw it, the rocket was vertical on the pad. 
Are you at the Cape?

Yes.  I'm working down here, although I don't work for SpaceX.  I'm trying to be careful with what I say, so I apologize for my somewhat cryptic posts (still new at this).

Offline Jim

  • Night Gator
  • Senior Member
  • *****
  • Posts: 37818
  • Cape Canaveral Spaceport
  • Liked: 22048
  • Likes Given: 430
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #847 on: 12/02/2013 10:45 pm »
so do I, there is no issue with posting what you see.

Offline beancounter

  • Full Member
  • ****
  • Posts: 1249
  • Perth, Western Australia
  • Liked: 106
  • Likes Given: 172
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #848 on: 12/02/2013 11:52 pm »
I don't know about SpaceX having 'go fever' but I believe I'm coming down with something similar.  Must be going around.
Beancounter from DownUnder

Offline Avron

  • Canadian Member
  • Senior Member
  • *****
  • Posts: 4930
  • Liked: 156
  • Likes Given: 160
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #849 on: 12/03/2013 02:26 am »
Was wondering how may spares would be held in Florida... i,e was a spare gas generator , just lying around or was it flow in today?

Offline WHAP

  • Member
  • Full Member
  • ****
  • Posts: 795
  • Liked: 105
  • Likes Given: 8
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #850 on: 12/03/2013 07:02 am »
I'm just immensely impressed that they can, in a span of only three days, rip out the gas generators of all nine engines, Clean&inspect then, re-mount them back on to their engines and wrap up the whole checkout of the rocket.
.
Especially considering that this would be only one of a great many actions that they need to be prepared to do at virtually zero notice.
.
Plus they did it over thanksgiving weekend.
.
Impressive.


Except that they only replaced the GG on one engine.  I don't recall seeing anything that said how many engines they cleaned. 
ULA employee.  My opinions do not necessarily reflect those of my employer.

Offline guckyfan

  • Senior Member
  • *****
  • Posts: 7442
  • Germany
  • Liked: 2336
  • Likes Given: 2900
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #851 on: 12/03/2013 07:14 am »
I don't recall seeing anything that said how many engines they cleaned.

My understanding of their statement was, that they planned to clean all 9 gas generators. I guess that would mean flushing them with some cleaning fluid, not dismounting them for cleaning. But that's just me.

Offline Lee Jay

  • Elite Veteran
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 8625
  • Liked: 3702
  • Likes Given: 334
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #852 on: 12/03/2013 12:05 pm »
I don't recall seeing anything that said how many engines they cleaned.

My understanding of their statement was, that they planned to clean all 9 gas generators. I guess that would mean flushing them with some cleaning fluid, not dismounting them for cleaning. But that's just me.

What do people use for that in lieu of 1,1,1 trichloroethane?

Offline baldusi

  • Senior Member
  • *****
  • Posts: 8371
  • Buenos Aires, Argentina
  • Liked: 2555
  • Likes Given: 8364
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #853 on: 12/03/2013 04:11 pm »
Weather still looks perfect... A day like today is evidence that government forecasters can't bring themselves to ever be fully confident in a forecast as they still have a 10% thick cloud chance :)
I still remember your "Be a man and call it a 100% chance of good weather" when they were quoting 99% for some Delta II launch. I still have a smile remembering that. But, if you model a system as a probability, you simply can't have 0% and 100%. And yes, I know about fractions and rounding and how a p of 0.9955 should be rounded up to 100%. But I digress.

Offline Joel

  • Full Member
  • ****
  • Posts: 532
  • Wisconsin
  • Liked: 45
  • Likes Given: 42
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #854 on: 12/03/2013 06:47 pm »
I have a flight departing eastwards from MIA within the launch window today. Any chance I'd be able to see anything from above? Like the spent first stage. My tablet gps works fine when flying so I know my coordinates... Just curious…
« Last Edit: 12/03/2013 06:47 pm by Joel »

Offline Lars_J

  • Senior Member
  • *****
  • Posts: 6160
  • California
  • Liked: 677
  • Likes Given: 195
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #855 on: 12/03/2013 06:53 pm »
I have a flight departing eastwards from MIA within the launch window today. Any chance I'd be able to see anything from above? Like the spent first stage. My tablet gps works fine when flying so I know my coordinates... Just curious…

It's possible, if you are lucky, and have a left side window seat. But they aren't going to fly very close, and you are not going to be "above" the rocket for very long. :)

Offline edkyle99

  • Expert
  • Senior Member
  • *****
  • Posts: 15502
    • Space Launch Report
  • Liked: 8788
  • Likes Given: 1386
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #856 on: 12/03/2013 08:17 pm »
SpaceX posted a launch pad image about three hours ago, but I already downloaded this very image on November 25.  It obviously is not from today. 
http://new.livestream.com/spacex/SES8/images/36378897

 - Ed Kyle

Offline Lurker Steve

  • Full Member
  • ****
  • Posts: 1420
  • Liked: 35
  • Likes Given: 9
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #857 on: 12/03/2013 08:38 pm »
I'm just immensely impressed that they can, in a span of only three days, rip out the gas generators of all nine engines, Clean&inspect then, re-mount them back on to their engines and wrap up the whole checkout of the rocket.
.
Especially considering that this would be only one of a great many actions that they need to be prepared to do at virtually zero notice.
.
Plus they did it over thanksgiving weekend.
.
Impressive.


Except that they only replaced the GG on one engine.  I don't recall seeing anything that said how many engines they cleaned.

Is the gas generator that much separate from the rest of the engine that they are easily replace-able ?
I know it requires rolling the entire rocket back to the integration building, but wouldn't you just replace the entire engine with a spare tested engine, rather than starting to replace individual parts ? I suppose it's easy to replace a value, but the gas generators are sort of one of the integral parts of the entire engine assembly, right ? Is it even possible to replace the gas generator without removing the engine from the stage ?

Offline JBF

  • Full Member
  • ****
  • Posts: 1459
  • Liked: 472
  • Likes Given: 914
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #858 on: 12/03/2013 08:49 pm »
See the circled part.  Now I'm not sure how easy it is to remove, but it doesn't look too bad.
"In principle, rocket engines are simple, but that’s the last place rocket engines are ever simple." Jeff Bezos

Offline Jim

  • Night Gator
  • Senior Member
  • *****
  • Posts: 37818
  • Cape Canaveral Spaceport
  • Liked: 22048
  • Likes Given: 430
Re: SpaceX Falcon 9 v1.1 - SES-8 - DISCUSSION THREAD
« Reply #859 on: 12/03/2013 08:56 pm »
See the circled part.  Now I'm not sure how easy it is to remove, but it doesn't look too bad.

that is the turbopump, the gas generator is further upstream and basically cut in half by the photo edge

Tags:
 

Advertisement NovaTech
Advertisement Northrop Grumman
Advertisement
Advertisement Margaritaville Beach Resort South Padre Island
Advertisement Brady Kenniston
Advertisement NextSpaceflight
Advertisement Nathan Barker Photography
0