Author Topic: SpaceX Falcon 9 : CRS-12 : Aug 14, 2017 : DISCUSSION  (Read 74624 times)

Online matthewkantar

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Maybe they will use up the old stock of grid fins on CRS flights as the are much less burny.

Matthew

Offline Ben the Space Brit

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Closer shot

Quote
Here's a sneak peek of the #SpaceX Falcon 9 and Dragon at Pad 39A. Liftoff of CRS-12 to ISS is slated for 12:31PM ET tomorrow. LZ-1 landing!

https://twitter.com/nova_road/status/896819753586757632

Who knitted that cool scarf for the Dragon?
"Oops! I left the silly thing in reverse!" - Duck Dodgers

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DON'T PROPAGANDISE, FLY!!!

Offline Barrie

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Closer shot

Quote
Here's a sneak peek of the #SpaceX Falcon 9 and Dragon at Pad 39A. Liftoff of CRS-12 to ISS is slated for 12:31PM ET tomorrow. LZ-1 landing!

https://twitter.com/nova_road/status/896819753586757632

Who knitted that cool scarf for the Dragon?

Pink scarf?  Might be a non-PC salute to the new Doctor Who ::)

Offline Skylab

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Would this have any impact on the landing (attempt)? I'm guessing it won't have, because it's 'only' the securing phase that would be impacted. So the rocket would have to ride out the storm unsecured. Anyone care to speculate/inform us?
Quote
"Storms Threaten Post-Landing Securing of Falcon 9 First Stage on Monday"
[SNIP]
"First-stage landings are often described by SpaceX as “experimental” and of secondary importance, when placed alongside the successful delivery of payloads into orbit. However, with the touchdown of tomorrow’s first stage scheduled about eight minutes after launch—around 12:39 p.m. EDT—there remains a possibility that the post-landing securing of the vehicle may be problematic. “After landing time Monday,” noted the 45th Weather Squadron, “storm chances will increase, potentially impacting first-stage securing.”
Source:
http://www.americaspace.com/2017/08/13/storms-threaten-post-landing-securing-of-falcon-9-first-stage-on-monday/
« Last Edit: 08/14/2017 10:30 AM by Skylab »

Offline Star One

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Closer shot

Quote
Here's a sneak peek of the #SpaceX Falcon 9 and Dragon at Pad 39A. Liftoff of CRS-12 to ISS is slated for 12:31PM ET tomorrow. LZ-1 landing!

https://twitter.com/nova_road/status/896819753586757632

Who knitted that cool scarf for the Dragon?

Pink scarf?  Might be a non-PC salute to the new Doctor Who ::)

Remind me again how long is it since Tom Baker was the Doctor
« Last Edit: 08/14/2017 12:02 PM by Star One »

Offline Ben the Space Brit

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Seriously, once the core is down, surely it would be earthed by the contact between the landing struts and the concrete. Is there any realistic explosion hazard or only a hazard to workmen and vehicles on and around the vehicle form being hit by lightning?
"Oops! I left the silly thing in reverse!" - Duck Dodgers

~*~*~*~

The Space Shuttle Program - 1981-2011

The time for words has passed; The time has come to put up or shut up!
DON'T PROPAGANDISE, FLY!!!

Offline rpapo

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Seriously, once the core is down, surely it would be earthed by the contact between the landing struts and the concrete. Is there any realistic explosion hazard or only a hazard to workmen and vehicles on and around the vehicle form being hit by lightning?
Ignition hazard is just one item.  For instance, what is the danger the stage might be blown over by winds from a storm?  How much would winds and rain interfere with attaching the crane harness to the top of the stage, or carrying it over to the stand, securing it to the stand, or doing any of the other tasks involved with moving the stage into the refurbishment hangar?

IIRC, so far the weather has been kind to them.

FWIW, as far as I'm concerned, the experience with the ASDS so far would seem to indicate that Falcon will be fine with anything short of a bad storm.
« Last Edit: 08/14/2017 12:45 PM by rpapo »
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Offline vanoord

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From the updates thread:

From this morning's pad photo op.

Full res:[2]

This seems new? (Circled yellow) 

The top section of the TEL was removed after the last launch and seems to have gained a couple bits - the part that's circled and the dark grey assembly across the top.

Offline Mike_1179

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From the updates thread:

This seems new? (Circled yellow) 

The top section of the TEL was removed after the last launch and seems to have gained a couple bits - the part that's circled and the dark grey assembly across the top.

X-37 needs an additional umbilical to blow AC up its backside. Would you ever route an AC umbilical through the interstage though?

Offline flyright

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From the updates thread:
...

This seems new? (Circled yellow) 

The top section of the TEL was removed after the last launch and seems to have gained a couple bits - the part that's circled and the dark grey assembly across the top.

The dark grey assembly looks new, but the circled part was there for CRS-11.
Still, I wonder what it is. Stablizer?

Link to CRS-11 pic: https://forum.nasaspaceflight.com/index.php?topic=42972.msg1684988#msg1684988

edit: fixed typo
« Last Edit: 08/14/2017 01:12 PM by flyright »

Offline vanoord

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The dark grey assembly looks new, but the circled part was there for CRS-11.
Still, I wonder what it is. Stablizer?

Link to CRS-11 pic: https://forum.nasaspaceflight.com/index.php?topic=42972.msg1684988#msg1684988

edit: fixed typo

Curious - I found a photo which claimed to be of CRS-11 and that wasn't there!

Offline flyright

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The dark grey assembly looks new, but the circled part was there for CRS-11.
Still, I wonder what it is. Stablizer?

Link to CRS-11 pic: https://forum.nasaspaceflight.com/index.php?topic=42972.msg1684988#msg1684988

edit: fixed typo

Curious - I found a photo which claimed to be of CRS-11 and that wasn't there!

Yep, It is curious. I don't see it any of the pics I've looked at for CRS-10, so it must have been added at some point for CRS-11.
I don't recall seeing any discussion about it.

Offline NX-0

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What do all the call signs mean? I have an acquaintance who says his son is AVI-1 today.

Offline vanoord

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What do all the call signs mean? I have an acquaintance who says his son is AVI-1 today.

Avionics operator?

Offline ZachF

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Skies looks pretty clear in the pics... hopefully we can get some good video from it like the NROL launch.

Offline rpapo

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Curiosity question: Do they evacuate the HIF at launch and static fire time?  I rather expect they do, but haven't read anything about it.
An Apollo fanboy . . . fifty years ago.

Offline Jim

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Seriously, once the core is down, surely it would be earthed by the contact between the landing struts and the concrete. Is there any realistic explosion hazard or only a hazard to workmen and vehicles on and around the vehicle form being hit by lightning?

This is what happens when lightning hits a composite fishing rod

https://i.redd.it/vqde67q14ebz.jpg

Offline intrepidpursuit

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Curiosity question: Do they evacuate the HIF at launch and static fire time?  I rather expect they do, but haven't read anything about it.

Yes. They evacuate the entire complex except for critical personnel well in advance of launch and they make sure critical personnel are out before any fuel loading or firing.

Offline Steve D

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Seriously, once the core is down, surely it would be earthed by the contact between the landing struts and the concrete. Is there any realistic explosion hazard or only a hazard to workmen and vehicles on and around the vehicle form being hit by lightning?

This is what happens when lightning hits a composite fishing rod

https://i.redd.it/vqde67q14ebz.jpg


And when it hits a plane on the ground.


Offline NX-0

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What do all the call signs mean? I have an acquaintance who says his son is AVI-1 today.

Avionics operator?
I am told he is 'in charge' of S2.
I am curious what all of them are, though.

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