Author Topic: SpaceX Falcon 9 CRS/SpX-10 Dragon - Feb. 19, 2017 - Discussion (Read 418688 times)

wolfpack · « **Reply #500 on:** 02/19/2017 01:16 am »

Quote from: Jim on 02/18/2017 07:38 pm

So, why are you same rah rah people not calling out Spacex for submerging carbon fibers in LOX?

You can always double down on that bet and build the whole LOX tank out of composites...

rockets4life97 · « **Reply #501 on:** 02/19/2017 01:17 am »

There are pictures in the update thread showing them working on the stage tonight.

Herb Schaltegger · « **Reply #502 on:** 02/19/2017 01:32 am »

Quote from: envy887 on 02/19/2017 01:12 am

Though I'm not sure how they get someone inside the interstage without separating.

Access panels, no doubt.

Rocket Science · « **Reply #503 on:** 02/19/2017 01:33 am »

Quote from: envy887 on 02/19/2017 01:12 am

Quote from: docmordrid on 02/19/2017 01:08 am
Separating the stages to work on? (TVC actuators?) (He spin up plumbing?)

Where do you see the stages separated? doesn't look like they are in that pic. That crane is reportedly used when there is someone working under or in the interstage. Though I'm not sure how they get someone inside the interstage without separating.

You forgot when "tin snips guy" went in there...

envy887 · « **Reply #504 on:** 02/19/2017 01:41 am »

Quote from: Herb Schaltegger on 02/19/2017 01:32 am

Quote from: envy887 on 02/19/2017 01:12 am
Though I'm not sure how they get someone inside the interstage without separating.

Access panels, no doubt.

Probably, but I can't find any interstage pictures showing them.

envy887 · « **Reply #505 on:** 02/19/2017 01:42 am »

Quote from: Rocket Science on 02/19/2017 01:33 am

Quote from: envy887 on 02/19/2017 01:12 am
Quote from: docmordrid on 02/19/2017 01:08 am
Separating the stages to work on? (TVC actuators?) (He spin up plumbing?)

Where do you see the stages separated? doesn't look like they are in that pic. That crane is reportedly used when there is someone working under or in the interstage. Though I'm not sure how they get someone inside the interstage without separating.
You forgot when "tin snips guy" went in there...

Not forgotten... just wondering how he got in. And that rocket is vertical, so he's 100+ feet off the ground.

Rocket Science · « **Reply #506 on:** 02/19/2017 01:48 am »

Quote from: envy887 on 02/19/2017 01:42 am

Quote from: Rocket Science on 02/19/2017 01:33 am
Quote from: envy887 on 02/19/2017 01:12 am
Quote from: docmordrid on 02/19/2017 01:08 am
Separating the stages to work on? (TVC actuators?) (He spin up plumbing?)

Where do you see the stages separated? doesn't look like they are in that pic. That crane is reportedly used when there is someone working under or in the interstage. Though I'm not sure how they get someone inside the interstage without separating.
You forgot when "tin snips guy" went in there...

Not forgotten... just wondering how he got in. And that rocket is vertical, so he's 100+ feet off the ground.

Vertical or horizontal, a side panel comes off and in you go...

atsf90east · « **Reply #507 on:** 02/19/2017 02:17 am »

SpaceX did a similar repair / changeout on the TVC actuators on the second stage after they scrubbed the first launch attempt of Thaicom-8. They rolled the Falcon9 back into the HIF at SLC-40 for the repairs, and then went vertical the next morning in plenty of time for the successful launch that afternoon.

Pete · « **Reply #508 on:** 02/19/2017 04:10 am »

Quote from: envy887 on 02/19/2017 01:08 am

I'd say 5 scrubs due to TVC issues IS a problem.

Or maybe SpaceX simply has very stringent specifications for the TVC performance range?

After all, a tvc problem on the second stage is a criticality-1 item, almost guaranteeing mission failure if it sticks for even a few seconds, so a high level of paranoia would be a good thing to have towards their performance...

Stranger · « **Reply #509 on:** 02/19/2017 08:11 am »

maybe, Musk hand trembled?

Rocket Science · « **Reply #510 on:** 02/19/2017 09:20 am »

Perhaps the "larger" question is "why" does the TVC issue keep reoccurring..?

toruonu · « **Reply #511 on:** 02/19/2017 10:02 am »

Quote from: Rocket Science on 02/19/2017 09:20 am

Perhaps the "larger" question is "why" does the TVC issue keep reoccurring..?

That's one question I'd like someone to ask at the post-launch presser.

kevinof · « **Reply #512 on:** 02/19/2017 10:34 am »

Indeed. At one point late in the countdown I heard them saying something about TVC motion check and then shortly afterwards "good feedback on TVC motion". Seems to be that while it worked it either was slightly off or something in SpaceX's memory raised a flag about previous history with this equipment.

It obviously is self adjusting and compensates maybe there is a manufacturing issue with tolerances being out a little too much for comfort.

Quote from: Rocket Science on 02/19/2017 09:20 am

Perhaps the "larger" question is "why" does the TVC issue keep reoccurring..?

docmordrid · « **Reply #513 on:** 02/19/2017 11:07 am »

Hosted webcast:

Technical webcast:

Mapperuo · « **Reply #514 on:** 02/19/2017 11:16 am »

Rockets vertical per the Spaceflight now livestream (http://spaceflightnow.com/2017/02/17/spacex-crs-10-mission-status-center/)

Mapperuo · « **Reply #515 on:** 02/19/2017 11:30 am »

Quote from: Johnnyhinbos on 02/19/2017 11:28 am

Hum, not according to the NASA TV livestream. It's horizontal and the sling crane is still attached.

Pre-recorded, they should have put a graphic on that as I was confused for a bit also!

Toastmastern · « **Reply #516 on:** 02/19/2017 11:32 am »

Quote from: Johnnyhinbos on 02/19/2017 11:28 am

Hum, not according to the NASA TV livestream. It's horizontal and the sling crane is still attached.

Are you sure it is a livestream? SpaceflightNow has had a camera aimed at the pad for the last few days

Johnnyhinbos · « **Reply #517 on:** 02/19/2017 11:33 am »

Quote from: Toastmastern on 02/19/2017 11:32 am

Quote from: Johnnyhinbos on 02/19/2017 11:28 am
Hum, not according to the NASA TV livestream. It's horizontal and the sling crane is still attached.

Are you sure it is a livestream? SpaceflightNow has had a camera aimed at the pad for the last few days

It was canned video - I just deleted my previous post to avoid confusion.

Rei · « **Reply #518 on:** 02/19/2017 11:46 am »

Quote from: Mapperuo on 02/19/2017 11:30 am

Quote from: Johnnyhinbos on 02/19/2017 11:28 am
Hum, not according to the NASA TV livestream. It's horizontal and the sling crane is still attached.

Pre-recorded, they should have put a graphic on that as I was confused for a bit also!

I hate it when that happens. I once watched an entire livestream of a launch that was actually an old one. I was confused because they were launching from a different location than I thought they were going to be and the payload was different than I thought it was going to be, but I just attributed that to me remembering incorrectly what was going to be launched that day :Þ

Orbiter · « **Reply #519 on:** 02/19/2017 12:25 pm »

Absolutely pouring rain at LC-39A right now.