Author Topic: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD  (Read 132434 times)

Offline Comga

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #40 on: 11/21/2013 02:40 pm »
Falcon 9 visible in online video.
Looks gloomy, with wind shaking the tower on which the camera is mounted.
LOX venting from second stage just started, then stopped.

edit: Another bit of second stage LOX venting at 11:17 AM EST, also lasting less than a minute
edit 2: Another episode of second stage LOX venting at 11:58 AM EST
« Last Edit: 11/21/2013 03:58 pm by Comga »
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline edkyle99

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #41 on: 11/21/2013 03:23 pm »
 - Ed Kyle
« Last Edit: 11/21/2013 03:24 pm by edkyle99 »

Offline Prober

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #42 on: 11/21/2013 03:23 pm »
Falcon 9 visible in online video.
Looks gloomy, with wind shaking the tower on which the camera is mounted.
LOX venting from second stage just started, then stopped.

edit: Another bit of second stage LOX venting at 11:17 AM EST, also lasting less than a minute.

they did an engine chill down  but it cut off quickly.
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Offline ugordan

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #43 on: 11/21/2013 03:31 pm »
Falcon 9 visible in online video.
Looks gloomy, with wind shaking the tower on which the camera is mounted.
LOX venting from second stage just started, then stopped.

edit: Another bit of second stage LOX venting at 11:17 AM EST, also lasting less than a minute.

they did an engine chill down  but it cut off quickly.

Who says it's an engine chilldown and not a tank purge before prop loading?

Online butters

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #44 on: 11/21/2013 03:56 pm »
It just did a heavy vent cycle. Testing the vent valve I suppose. Don't know if it's a normal part of the WDR procedures or an anomaly investigation.

EDIT: And again, another heavy vent cycle.
« Last Edit: 11/21/2013 03:58 pm by butters »

Offline ugordan

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #45 on: 11/21/2013 04:00 pm »
It could also be a vent on the T/E, for the 2nd stage umbilical, conditioning the lines for prop loading and such. The way it's spewing it out on video reminds me of the VAFB erector vent.
« Last Edit: 11/21/2013 04:01 pm by ugordan »

Offline Mike_1179

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #46 on: 11/21/2013 04:24 pm »
And again, another heavy vent cycle.

And now another

Offline rcoppola

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #47 on: 11/21/2013 04:31 pm »
And again, another heavy vent cycle.

And now another
And another..
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Offline The_Ronin

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Offline Mike_1179

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #49 on: 11/21/2013 04:35 pm »
I don't remember seeing this sort of cyclic venting on the other F9 launches (which this WDR / hot fire is supposed to simulate) but I might be wrong.

Offline rcoppola

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #50 on: 11/21/2013 04:39 pm »
I don't remember seeing this sort of cyclic venting on the other F9 launches (which this WDR / hot fire is supposed to simulate) but I might be wrong.
I agree. They are working something. Lines. pumps, flow rate, connections...not sure. But it feels Pad - T/E related.
« Last Edit: 11/21/2013 04:42 pm by rcoppola »
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Offline ugordan

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #51 on: 11/21/2013 04:50 pm »
FWIW, it seems pretty periodic, vent periods starting every 220-ish seconds and lasting about 35 seconds.

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Offline ugordan

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #53 on: 11/21/2013 05:20 pm »
It's hard to make anything out in that feed, but it looks to me like the 1st stage LOX tank is iced over which would indicate the tanking is well underway.

Offline Comga

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #54 on: 11/21/2013 05:33 pm »
Camera view adjusted, zoomed in, centerred.  Now adjusting gain and white balance.  Getting ready for the event (hopefuly WDR)
Vapor clouds around base are now gone.
ugordon: Do you say that because the lower third is slightly darker than the remainder of the rocket?

edit: faint venting from near top of first stage at 13:34 EST
« Last Edit: 11/21/2013 05:34 pm by Comga »
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline Lars_J

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #55 on: 11/21/2013 05:34 pm »
Someone just tweaked the WB and exposure settings on the camera - it is easier to see the ice on the S1 LOX tank now.

Offline sdsds

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #56 on: 11/21/2013 05:35 pm »
Camera view adjusted, zoomed in, centerred.  Now adjusting gain and white balance.

Looks good! Can see the minor venting.
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Offline mlindner

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #57 on: 11/21/2013 05:36 pm »
Really good page for it here:
http://countdown.ksc.nasa.gov/elv/
Interesting all the launch info on the page.
« Last Edit: 11/21/2013 05:36 pm by mlindner »
LEO is the ocean, not an island (let alone a continent). We create cruise liners to ride the oceans, not artificial islands in the middle of them. We need a physical place, which has physical resources, to make our future out there.

Offline ugordan

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #58 on: 11/21/2013 05:41 pm »
ugordon: Do you say that because the lower third is slightly darker than the remainder of the rocket?

Yes. Here's a contrast-enhanced view.

BTW, the camera seems to be capturing a 16:9 aspect ratio, but it's squished to 4:3 for the webcast.
« Last Edit: 11/21/2013 05:44 pm by ugordan »

Offline sdsds

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Re: SpaceX Falcon 9 v1.1 - SES-8 - November 25 - UPDATE THREAD
« Reply #59 on: 11/21/2013 05:47 pm »
BTW, the camera seems to be capturing a 16:9 aspect ratio, but it's squished to 4:3 for the webcast.

Thanks for that. Again with noticeable venting.
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