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#1420
by
kevinof
on 24 Jan, 2018 20:12
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Yep does look like it's not the full Monty. Would to nice to get a full un-edited closeup with full audio!
Official vid - shorter than 12 secs but impressive
https://twitter.com/SpaceX/status/956236301275054080
This one suggests a six second-ish burn, which is shorter than reality. They must have lost something in the edit. Other videos (L2, etc.) are showing a 10-ish second burn.
- Ed Kyle
Looks like it's sped up by a factor of ~2. If you play it at half speed in Youtube, the venting and water flow from the rainbirds looks much more natural.
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#1421
by
Llian Rhydderch
on 24 Jan, 2018 20:18
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Has the center core safety zone out in the Atlantic been posted yet?
I just looked through all pages of the UPDATES FH thread and could not find it.
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#1422
by
Jim
on 24 Jan, 2018 20:20
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Has the center core safety zone out in the Atlantic been posted yet?
I just looked through all pages of the UPDATES FH thread and could not find it.
They haven't officially scheduled the launch yet. That is when it will be posted
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#1423
by
gongora
on 24 Jan, 2018 20:25
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Has the center core safety zone out in the Atlantic been posted yet?
I just looked through all pages of the UPDATES FH thread and could not find it.
Drone ship position is:
MOBILE: Autonomous Drone Ship, within 10 nautical miles, within 18.52 km, centered
around NL 29-00-20; WL 77-07-55
I'm sure when the launch is actually scheduled our members that look for the exclusion zones will post them.
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#1424
by
Lar
on 24 Jan, 2018 20:33
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https://twitter.com/elonmusk/status/956233892637286400
@elonmusk
Falcon Heavy hold-down firing this morning was good. Generated quite a thunderhead of steam. Launching in a week or so.
10:35 AM - 24 Jan 2018
So about 2 weeks then, give or take (applied Elon Time Dilation Factor)
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#1425
by
Fan Boi
on 24 Jan, 2018 20:35
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Do those exhaust clouds have an official name? How about CumulusElonmus?
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#1426
by
IanThePineapple
on 24 Jan, 2018 20:40
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https://twitter.com/elonmusk/status/956233892637286400
@elonmusk
Falcon Heavy hold-down firing this morning was good. Generated quite a thunderhead of steam. Launching in a week or so.
10:35 AM - 24 Jan 2018
So about 2 weeks then, give or take (applied Elon Time Dilation Factor)
I'd guess sometime in the window of 1.5-3 weeks from now.
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#1427
by
georgegassaway
on 24 Jan, 2018 20:53
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I'd guess sometime in the window of 1.5-3 weeks from now.
I guesstimated-"calculated" this on Jan 13th:
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#1428
by
cebri
on 24 Jan, 2018 21:02
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I wonder if the center core will be recovered if they launch so close to GovSat. SpaceX is gonna need more barges.
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#1429
by
Star One
on 24 Jan, 2018 21:03
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It's good to be sceptical. Not so good to be cynical 
I prefer to be on the first side. I don't believe that FH will launch after a week. But we've waited for so long - a week, two weeks or a month would make no difference.
You sound more like a glass half empty sort of person.
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#1430
by
Comga
on 24 Jan, 2018 21:07
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https://twitter.com/elonmusk/status/956233892637286400
@elonmusk
Falcon Heavy hold-down firing this morning was good. Generated quite a thunderhead of steam. Launching in a week or so.
10:35 AM - 24 Jan 2018
So about 2 weeks then, give or take (applied Elon Time Dilation Factor)
Perhaps you underestimate both "a week or so" and the Musk Time Dilation Factor.
As Musk said, his estimate is "aspirational".
How about 8-9 days times 2.4 or ~20 days, or Feb 6 +/- ?
~4 days before the PAZ & Microsat 2a/2b launch in California.
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#1431
by
OneSpeed
on 24 Jan, 2018 21:16
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Here are the audio waveforms at the ignition of a typical F9 and the FH static fire. The F9 engines all appear to start simultaneously, but as advertised, the FH ignitions appear staggered over about 0.32 seconds, with 9 distinguishable events. Perhaps the engines were ignited 3 at a time, one on each core? I've also attached the audio files in case you want to do your own analysis.
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#1432
by
Norm38
on 24 Jan, 2018 22:45
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I wonder if the center core will be recovered if they launch so close to GovSat. SpaceX is gonna need more barges.
If they can only recover one, then based on the value of the engineering data, recover FH and dump the Block 3/4 core they don't need.
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#1433
by
Kabloona
on 24 Jan, 2018 22:55
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Here are the audio waveforms at the ignition of a typical F9 and the FH static fire. The F9 engines all appear to start simultaneously, but as advertised, the FH ignitions appear staggered over about 0.32 seconds, with 9 distinguishable events. Perhaps the engines were ignited 3 at a time, one on each core?
Chris Gebhart's article said it was "understood" that 2 engines were ignited at a time, but your analysis suggesting 3 at a time makes more sense, with perhaps the same # engine on each core being started simultaneously. Maybe the central engines (#9) first, followed by staggered starts around the perimeter.
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#1434
by
wannamoonbase
on 24 Jan, 2018 22:58
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I wonder if the center core will be recovered if they launch so close to GovSat. SpaceX is gonna need more barges.
If they can only recover one, then based on the value of the engineering data, recover FH and dump the Block 3/4 core they don't need.
Indeed. Not just FH but having 2 operational pads on the east coast is going to strain the barge availability. But of all the assets they need barges should be pretty easy and cheap.
Then if Boca Chica launches it's 12 F9's they'll need yet another barge, or perhaps 2 could adequately manage the the three east coast pads.
But perhaps with the Block 5 there will be more RTLS flights and less ASDS.
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#1435
by
Bubbinski
on 24 Jan, 2018 23:20
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Congratulations to SpaceX for a successful test firing. If the launch falls around Feb. 10/11 there MIGHT be a sliver (just a sliver) of a possibility for me to fly to Orlando/the Cape from Phoenix where I’ll be visiting. I do have a relative in the Orlando area so I’m set as far as lodging, but again, this is just a sliver of a possibility. And of course this assumes we don’t have shutdown part deux.
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#1436
by
Jdeshetler
on 24 Jan, 2018 23:53
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Falcon Heavy = 5,100,000 lbf
Saturn V = 7,891,000 lbf
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#1437
by
Rocket Science
on 25 Jan, 2018 00:11
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Pretty neat video, too bad we don't have the same flame deflector and trench...
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#1438
by
cppetrie
on 25 Jan, 2018 00:20
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The side boosters are mirror images of each other and the core is heavily reinforced, since the basic core was lighten to meet performance goals for single stick missing
Are you talking about FH here? I was under the impression the side boosters were normal F9 boosters and one was rotated 180 degrees about its long axis to make it all line up and work properly. That would imply they are identical and not mirror images. Perhaps I’ve misunderstood something somewhere along the line. AIUI DIVH uses mirror image side boosters and so each of the cores is unique, which contributes to it’s expensiveness.
No, he was talking about Delta IV Heavy. Falcon Heavy has rotated identical boosters, not mirror symmetric boosters.
Ok then. My understanding was accurate. Carry on.
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#1439
by
wolfpack
on 25 Jan, 2018 00:37
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Shuttle would be closer
Close enough.
