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#100
by
Shanuson
on 26 Oct, 2017 06:31
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X-posting from KoreaSat Updates:
TEL is now back in the HIF. There are also reports that all three FH cores are in there as well, I'm sure it's nice and cozy!
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#101
by
envy887
on 30 Oct, 2017 12:18
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From the SpaceX photos on the KoreaSat thread. Was it public that the outside east and west holddowns were installed? I remember seeing that the outside north side ones were installed, but can't find that picture now.
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#102
by
woods170
on 30 Oct, 2017 12:55
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From the SpaceX photos on the KoreaSat thread. Was it public that the outside east and west holddowns were installed? I remember seeing that the outside north side ones were installed, but can't find that picture now.
The previous image that supposedly showed the outside west hold-down installed in fact showed a shadow:
https://forum.nasaspaceflight.com/index.php?topic=41015.msg1735121#msg1735121The new Koreasat image however clearly shows that the east and west outside hold-downs are now installed.
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#103
by
envy887
on 30 Oct, 2017 15:11
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Hopefully the webcast will show the south side holddowns installed as well
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#104
by
cppetrie
on 30 Oct, 2017 18:26
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All three FH cores confirmed as being in the hanger during processing of today’s KoreaSat mission.
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#105
by
Ronsmytheiii
on 30 Oct, 2017 19:13
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From Koreasat webcast, FH cores to the left and right
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#106
by
Ronsmytheiii
on 30 Oct, 2017 19:14
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And the Launch mount modifications with new TSMs
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#107
by
cppetrie
on 30 Oct, 2017 19:20
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Is this one of the south side hold downs or light effect?
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#108
by
envy887
on 30 Oct, 2017 19:51
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Is this one of the south side hold downs or light effect?
It is a south side holddown, but it's the center one used for F9.
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#109
by
cppetrie
on 30 Oct, 2017 20:07
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Is this one of the south side hold downs or light effect?
It is a south side holddown, but it's the center one used for F9.
Can’t be. It isn’t inline with the booster on the TEL. Center south would be hidden by the erector arm in that pic and not visible.
Edit: I think see what you’re suggesting. That what I circled is the side panel of the center south hold down. Not totally convinced, but maybe.
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#110
by
zubenelgenubi
on 01 Nov, 2017 15:57
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Operational question:
If the launch campaign for Falcon Heavy Demo is such that the vehicle is ready for launch during the "holidays," would it be better for the launch campaigners' managers to delay scheduling the launch until after New Year's Day?
(That is, for a launch that does not need to meet a celestial mechanics launch window or a national security imperative.)
To specify:
Are there substantial additional staff costs that would arise from attempting a launch from KSC between Saturday, December 23 and Monday, January 1, inclusive?
Or morale costs?
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#111
by
Chris Bergin
on 01 Nov, 2017 16:10
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#112
by
russianhalo117
on 01 Nov, 2017 16:12
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Is this one of the south side hold downs or light effect?
It is a south side holddown, but it's the center one used for F9.
Can’t be. It isn’t inline with the booster on the TEL. Center south would be hidden by the erector arm in that pic and not visible.
Edit: I think see what you’re suggesting. That what I circled is the side panel of the center south hold down. Not totally convinced, but maybe.
All South Side TSM's have been installed. That is what is circled. Only the South side Hold Downs and North side TSM's await installation which should be done before ZUMA launches. Then its all of the Plumbing, Data, and wiring for the reaction frame and the final kitting out of the TEL that has to be done for FH-01 to fly.
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#113
by
Rocket Science
on 01 Nov, 2017 21:29
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Thanks for the great article Chris G with Nathan's eye candy. Looks like we might be in for a great Christmas present!
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#114
by
robbak
on 01 Nov, 2017 23:37
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One question being bandied about on the reddit - the 2-engines-at-a-time start procedure - is that two engines per stack (so, 14 different start delays), or 2 engines per core, or 5 start delays? The 2-per stack might be smoother overall, but it does lead to off-center loads on each stack that are avoided if they light 2 per core at a time.
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#115
by
russianhalo117
on 01 Nov, 2017 23:44
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One question being bandied about on the reddit - the 2-engines-at-a-time start procedure - is that two engines per stack (so, 14 different start delays), or 2 engines per core, or 5 start delays? The 2-per stack might be smoother overall, but it does lead to off-center loads on each stack that are avoided if they light 2 per core at a time.
AFAIK it is 2 per core.
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#116
by
Norm38
on 02 Nov, 2017 02:35
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What does that mean? They start 9 at a time now right?
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#117
by
Tomness
on 02 Nov, 2017 02:46
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#118
by
rsnellenberger
on 02 Nov, 2017 04:36
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Nice article.
The info about the staggered startup was interesting, but I would have liked to see some mention or discussion of any testing that SpaceX has done to support that kind of startup. Before AMOS-6, I could have imagined them trying it for the first time on 39A during the static test - it’s hard to believe that they’d try that now.
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#119
by
ugordan
on 02 Nov, 2017 06:26
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One question being bandied about on the reddit - the 2-engines-at-a-time start procedure - is that two engines per stack (so, 14 different start delays), or 2 engines per core, or 5 start delays? The 2-per stack might be smoother overall, but it does lead to off-center loads on each stack that are avoided if they light 2 per core at a time.
AFAIK it is 2 per core.
To expand on this a bit, how certain are we that they're not already employing a staggered start for single stick F9 cores?
They definitely are employing a staggered shutdown as can be seen in all the footage plus I always got the impression that there is more than 1 TEA/TEB flash during pad ignition, but several rapid ones instead, at least in post v1.0 vehicles.
