Author Topic: SpaceX Recovered First Stage 'Monument' in Hawthorne  (Read 28240 times)

Offline king1999

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #20 on: 08/23/2016 10:58 pm »
Amazing that they just use the four legs without additional support!
Can an earthquake topple it?

Offline shooter6947

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #21 on: 08/23/2016 11:02 pm »
Or wind.  I was surprised that they didn't at least have guy wires on or it or something.  Maybe that's something that they'll add in the coming days/weeks.

Offline CameronD

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #22 on: 08/23/2016 11:18 pm »
If they loaded the prop tank with enough water ballast, I wouldn't think it'd need guy wires to hold it there: this is Hawthorne, not the rolling ocean. ..besides, they've probably bolted the feet down to the concrete to make it harder for someone to steal it.  :P

It would be cool if the grid fins would wave at you.  Maybe some burst of nitrogen coming from the thrusters.   ;D

Well, I do think it's cute that they've got the grid fins deployed since that would have required some extra effort.

All that's missing is the Big X logo on the pavement underneath showing a touchdown right on target.
« Last Edit: 08/23/2016 11:23 pm by CameronD »
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Offline guckyfan

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #23 on: 08/24/2016 05:17 am »
If they loaded the prop tank with enough water ballast, I wouldn't think it'd need guy wires to hold it there: this is Hawthorne, not the rolling ocean. ..besides, they've probably bolted the feet down to the concrete to make it harder for someone to steal it.  :P


A number of bolts anchored in the concrete was visible on some photos. At least 8 massive bolts for each foot.

Offline 1

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #24 on: 08/24/2016 08:51 pm »
Decided to 'borrow' one of the lab cameras and take an extended lunch today. Legs definitely appear bolted to the ground. Couldn't see any other obvious (to me, anyway) modifications to improve rigidity. Lots of chalk markings on them though. And, of course, another scorched core was parked on the street. Probably going to Elon's back yard.
« Last Edit: 08/24/2016 09:56 pm by 1 »

Offline IainMcClatchie

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #25 on: 08/24/2016 10:49 pm »
Looks like they've added some wiring from the pad to the foot and from the leg to the prop tank.  Is that for lighting at night?

Offline envy887

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #26 on: 08/24/2016 11:04 pm »

Offline CameronD

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #27 on: 08/24/2016 11:32 pm »
Decided to 'borrow' one of the lab cameras and take an extended lunch today. Legs definitely appear bolted to the ground. Couldn't see any other obvious (to me, anyway) modifications to improve rigidity. Lots of chalk markings on them though. And, of course, another scorched core was parked on the street. Probably going to Elon's back yard.

Cool photos - thanks for posting them in high-res. :)

Since aerospace-grade carbon fibre is not UV resistant and will fail if exposed to sunlight for an extended period of time, I wonder how they plan to protect the stage (and particularly the legs) from the elements?  The usual thing is copious amounts of white paint, which would be a shame since it would certainly cover a lot of the interesting bits also.
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Offline 1

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #28 on: 08/24/2016 11:44 pm »
Looks like they've added some wiring from the pad to the foot and from the leg to the prop tank.  Is that for lighting at night?

The stage definitely has one of those blinky red 'please-don't-fly-an-airplane-into-me' lights that I've seen on at night. Can't say if those particular wires power it or do something else.

The "scorched core on the street" is from the Thaicom 8 launch:

http://www.universetoday.com/wp-content/uploads/2016/06/IMG_1270_1c_SpaceX-Thaicom-8_Ken-Kremer.jpg

Thanks, I was going to try to look into that later on today, but I think you've saved me the trouble.

Offline okan170

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #29 on: 08/25/2016 03:38 am »
Something about those legs being bright-white just seems... wrong!   ;)

Pretty neat that along a stretch of highway between LAX and downtown LA, you'll pass the Falcon 9 at SpaceX as well as Endeavour at the science center!  (Hopefully soon to be upright as well)

Offline sfxtd

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #30 on: 08/25/2016 04:58 am »
Looks like they've added some wiring from the pad to the foot and from the leg to the prop tank.  Is that for lighting at night?

It is an interesting "GSE" bundle. I am guessing that in addition to the marker light power cable there are tank pressurant and pressure sensor lines.

Offline IainMcClatchie

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #31 on: 08/25/2016 05:31 am »
They are going to leave the thing pressurized all the time??

The more I think about this, the more it seems it just can't last.

I suppose the Saturn Vs have lasted until now, so it works somehow.

Offline CameronD

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #32 on: 08/25/2016 06:55 am »
They are going to leave the thing pressurized all the time??

The more I think about this, the more it seems it just can't last.

I suppose the Saturn Vs have lasted until now, so it works somehow.

Well, in my experience, white paint covers a multitude of sins...
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Offline Jcc

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #33 on: 08/25/2016 09:56 am »
Looks like they've added some wiring from the pad to the foot and from the leg to the prop tank.  Is that for lighting at night?

Maybe they have it grounded to protect against lightning strikes.

Offline StuffOfInterest

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #34 on: 08/25/2016 11:30 am »
Looks like they've added some wiring from the pad to the foot and from the leg to the prop tank.  Is that for lighting at night?

It is an interesting "GSE" bundle. I am guessing that in addition to the marker light power cable there are tank pressurant and pressure sensor lines.

If I was putting up the tallest tower in the neighborhood I'd take advantage of the elevation.  Perhaps a few cameras to monitor the facility and surrounding neighborhood.  Being that the interstage is carbon fiber you could probably put a directional antenna up there if they want a data link to one of their other facilities in the area without any unsightly structures being visible.

Offline Zed_Noir

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #35 on: 08/25/2016 02:46 pm »
Maybe they can put some cellphone transponders behind the interstage fairing.

Offline shooter6947

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #36 on: 08/25/2016 02:47 pm »
Maybe they have it grounded to protect against lightning strikes.

LA never gets thunderstorms, so this seems unlikely.

Offline b ramsey

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #37 on: 08/25/2016 03:10 pm »
Cool pics. The thing that I noticed in those close ups is the which appears to be a rubber type gasket that runs all around the inside of the landing leg that must seal against the rocket stage when it is folded up. I guess that is to protect the landing strut during launch.

Offline mme

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #38 on: 08/25/2016 04:15 pm »
Maybe they have it grounded to protect against lightning strikes.

LA never gets thunderstorms, so this seems unlikely.
I grew up in LA, I assure you LA gets lightening.

http://www.asa100.com/stock-photography/stock_photography004

Apologies if that was just a joke but people actually believe that.  Even some transplants that haven't seen it themselves.  Yet.
« Last Edit: 08/25/2016 04:16 pm by mme »
Space is not Highlander.  There can, and will, be more than one.

Offline CameronD

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Re: SpaceX Recovered First Stage 'Monument' in Hawthorne
« Reply #39 on: 08/26/2016 12:36 am »
Maybe they have it grounded to protect against lightning strikes.

LA never gets thunderstorms, so this seems unlikely.
I grew up in LA, I assure you LA gets lightening.

Lightning earthing cables would be a lot fatter than that and, if fitted, certainly would not run up the center of the leg. I see no evidence from the pics posted here that the stage is conventionally lightning-protected and, since it appears to be higher then the building adjacent, it probably should be since them "blinky red 'please-don't-fly-an-airplane-into-me' lights" (to quote a previous poster) do a great job attracting the stuff..

Two possibilities exist, either:
1. The stage is constructed from conductive metal/carbon-fibre and is thus considered by the gurus at SpX to be inherently self-protecting via the bolts into the concrete, or
2. They haven't got around to it yet. :)
 
« Last Edit: 08/26/2016 12:46 am by CameronD »
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

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