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#26 2018-12-05 20:32:09

Void
Member
Registered: 2011-12-29
Posts: 2,495

Re: Space X - another successful mission...

O.F. yes.  I have other strange hunches as well.

Elon said something about how if you were in a water crash, you had better chances of survival than an explosion of a crashed rocket.

Was it an experiment, to speculate on saving in part a crippled "Starship"?  Maybe not, but it could be pertinent.

Here is a landing video from the perspective of the 1st stage.

https://twitter.com/elonmusk/status/1070399755526656000

I have speculated on what happens when the engines fire into water before.  I think they aerated.  Therefore the water becomes very soft and cushiony.
 
While I expect the hot landing engine to be damaged beyond recovery by quenching, the rest of the rocket potentially may with future innovations only suffer the need for recovery to a maintenance area, and a maximum overhaul.  I think.

It does ask the question if landing in a fresh water lake will be a better plan.  That is immersion in part in the waters of it and then to float on it.  It also asks after that question, if that is a plan, how can you design that landing method to be optimal for the survival of the hardware?

Last edited by Void (2018-12-05 20:37:46)


I like people who criticize angels dancing on a pinhead.  I also like it when angels dance on my pinhead.

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#27 2018-12-06 18:14:14

louis
Member
From: UK
Registered: 2008-03-24
Posts: 4,031

Re: Space X - another successful mission...

Seems like it was a failure of a non-redundant pump...and they will be looking to build in redundancy.


https://www.youtube.com/watch?v=Ge1_6MUWAYg


Let's Go to Mars...Google on: Fast Track to Mars blogspot.com

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#28 2018-12-06 18:41:41

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 13,342

Re: Space X - another successful mission...

That is correct Void on the engine air ration of the Ocean but now the rocket is junk unless its totally refurbished.

It was spiraling long before the pumps take over from what can be seen...so it could not find its target visually or via radio I would think.

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#29 2018-12-07 12:58:32

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,561

Re: Space X - another successful mission...

No. The spiraling was caused by pump controlling a grid fin which did NOT deploy properly. There was no software or computer issue that was in error.

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#30 2018-12-07 16:48:36

Void
Member
Registered: 2011-12-29
Posts: 2,495

Re: Space X - another successful mission...

I recall that the grid fins are very expensive, so they should at least be able to get some valuable parts from the sea crashed rocket.   And perhaps not intentional in the doing but some hints on how to ditch a rocket with crew and/or passengers in water with better hopes of human survival and even to a degree hardware salvage.

So, something to gain even in failing.

Last edited by Void (2018-12-07 16:50:54)


I like people who criticize angels dancing on a pinhead.  I also like it when angels dance on my pinhead.

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#31 2018-12-07 18:56:36

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 13,342

Re: Space X - another successful mission...

Hypersonic grid fins help the booster steer its way back for a precision touchdown. Each Falcon 9 first stage sports four of these waffle-iron-looking things, which are installed close to the top of the booster.

images?q=tbn:ANd9GcRY3PsMz_WaRu2a1fC0I9rSS0w4GAlpxVAXHk6w82ROt8nlLz3NpqB1RK8

Grid fin shows extended in this still for one of them so it seemed to be working....

But in either case Musk stated that this system will get redundancy most like in the near future...

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#32 2018-12-08 18:11:57

louis
Member
From: UK
Registered: 2008-03-24
Posts: 4,031

Re: Space X - another successful mission...

Nice new video from Mic of Orion who I think nicely balances optimism and pragmatism.

https://www.youtube.com/watch?v=vIZN4v3Ktu8


Let's Go to Mars...Google on: Fast Track to Mars blogspot.com

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