Author Topic: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION  (Read 287721 times)

Offline Lar

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #220 on: 05/27/2016 02:28 am »
So their youtube channel says tomorrow at 5:40pm - is that the new tentative launch time?
OrbitalATK is cited as saying 5:39pm
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Online Lee Jay

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #221 on: 05/27/2016 02:39 am »
So their youtube channel says tomorrow at 5:40pm - is that the new tentative launch time?
OrbitalATK is cited as saying 5:39pm

SpaceX says so too:

http://www.spacex.com/webcast

"Launch of THAICOM 8 scheduled for no earlier than Friday, May 27th at 5:39pm ET."

Offline Jim

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #222 on: 05/27/2016 03:02 am »
I thought the tvc was supplied pressurized kerosene from the fuel turbo pump? If so how do they test motion when the rocket isn't running?

That is first stage, I believe second stage has EMA's

Offline linxiaoyi

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #223 on: 05/27/2016 03:04 am »
I thought the tvc was supplied pressurized kerosene from the fuel turbo pump? If so how do they test motion when the rocket isn't running?

That is first stage, I believe second stage has EMA's

What is EMS?
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Offline Robotbeat

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #224 on: 05/27/2016 03:05 am »
electromagnetic actuator, I believe.
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Offline Kim Keller

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #225 on: 05/27/2016 03:17 am »
electromagnetic actuator, I believe.

electro-mechanical

Offline Fluke72

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #226 on: 05/27/2016 04:34 am »
I thought the tvc was supplied pressurized kerosene from the fuel turbo pump? If so how do they test motion when the rocket isn't running?

That is first stage, I believe second stage has EMA's

Second stage also has TVCs.... both are hydromechanical. GSE provides pressure during static testing.
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Offline arsenal

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #227 on: 05/27/2016 05:13 am »
Sounds similar to an issue they had back in 2015. https://twitter.com/elonmusk/status/552437001291841539

Wow, nice memory. Indeed sounds very similar.
Uhhh, you can credit Google for the memory.

Online darkenfast

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #228 on: 05/27/2016 08:27 am »
If this actuator is in fact a device that gimbals the engine, would I be correct in assuming that the static fire countdown included a test of it as well?
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Offline Hankelow8

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #229 on: 05/27/2016 08:41 am »
If this actuator is in fact a device that gimbals the engine, would I be correct in assuming that the static fire countdown included a test of it as well?

I would have expected the static fire to simulate the countdown up to engine ignition, so one should assume activation of that device should have been included in the checkout tests.

Offline Hauerg

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #230 on: 05/27/2016 08:48 am »
Is he? SpaceX has introduced some higher-risk items, for instance, on one of their engines (but not all), they had a 3D printed oxygen valve as a flight demo. I could definitely see them refly some of the recovered hardware like even a whole engine even if the whole stage doesn't refly.

Also: The F9 now has a BIG margin by using the fuel reserved for landing for supporting ascent in case of an engine failure.
But yeah, unless they are 99.xx% sure the used engine will work just fine they will not risk ist.

NOW would be a good time to have some kind of primitive orbital refueling infrastructure. Would be perfect for higher risk "test" flights.


Edit/Lar: Fix Quotes....  Could people PLEASE use the preview  button to make sure you haven't mangled things? If possible. Please and thank you.
« Last Edit: 05/27/2016 02:12 pm by Lar »

Offline cuddihy

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #231 on: 05/27/2016 11:06 am »
I thought the tvc was supplied pressurized kerosene from the fuel turbo pump? If so how do they test motion when the rocket isn't running?

That is first stage, I believe second stage has EMA's

Second stage also has TVCs.... both are hydromechanical. GSE provides pressure during static testing.

Folks, even hydromechanical powered actuators need electromechanical valves...there's not exactly a dude up there to turn the valves by hand 😀

Offline Kim Keller

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #232 on: 05/27/2016 04:40 pm »
Folks, even hydromechanical powered actuators need electromechanical valves...there's not exactly a dude up there to turn the valves by hand 😀

Electro-mechanical actuators are referred to as such because they use electricity to drive movement. Hydraulic actuators use fluid.

An EMA is not a hydraulic actuator, and a hydraulic actuator is not an EMA.
« Last Edit: 05/27/2016 04:56 pm by Kim Keller »

Offline The_Ronin

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #233 on: 05/27/2016 06:59 pm »
Is it even vertical on the pad?

Offline abaddon

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #234 on: 05/27/2016 07:10 pm »
Hey guys, the party thread is here: http://forum.nasaspaceflight.com/index.php?topic=40089.0.  Please use it.

Offline Bubbinski

The live stream countdown is at 2 hours 11 minutes at SpaceX.com. So they haven't scrubbed as of now.

Edited to add: it appears the webcast will start at 5:38 Eastern if the countdown clock on the webcast is right. Either they're starting the webcast 1 min before launch or they'll postpone the launch to sometime later in the window
« Last Edit: 05/27/2016 07:32 pm by Bubbinski »
I'll even excitedly look forward to "flags and footprints" and suborbital missions. Just fly...somewhere.

Online ericspittle

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #236 on: 05/27/2016 07:34 pm »
The live stream countdown is at 2 hours 11 minutes at SpaceX.com. So they haven't scrubbed as of now.

Edited to add: it appears the webcast will start at 5:38 Eastern if the countdown clock on the webcast is right. Either they're starting the webcast 1 min before launch or they'll postpone the launch to sometime later in the window
It always looks like that, the actual webcast normally starts ~20 minutes earlier than the countdown says it will.

Offline sevenperforce

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #237 on: 05/27/2016 07:35 pm »
The live stream countdown is at 2 hours 11 minutes at SpaceX.com. So they haven't scrubbed as of now.

Edited to add: it appears the webcast will start at 5:38 Eastern if the countdown clock on the webcast is right. Either they're starting the webcast 1 min before launch or they'll postpone the launch to sometime later in the window
I'm pretty sure that in the past they have sometimes started the webcast earlier than the posted time.

Offline just-nick

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #238 on: 05/27/2016 07:54 pm »
The live stream countdown is at 2 hours 11 minutes at SpaceX.com. So they haven't scrubbed as of now.

Edited to add: it appears the webcast will start at 5:38 Eastern if the countdown clock on the webcast is right. Either they're starting the webcast 1 min before launch or they'll postpone the launch to sometime later in the window
It always looks like that, the actual webcast normally starts ~20 minutes earlier than the countdown says it will.
I think that they are using a T-0 clock on the webcast, not a webcast-start-time. Don't know why...just fits the data (and did yesterday, at the original T-0.

Offline Lar

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Re: SpaceX Falcon-9 - Thaicom-8 - May 27, 2016 - DISCUSSION
« Reply #239 on: 05/27/2016 08:31 pm »
Hey guys, the party thread is here: http://forum.nasaspaceflight.com/index.php?topic=40089.0.  Please use it.

Some posts moved there. If you think I moved yours incorrectly....  for only 9.99 I'll move it back...
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