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28 Mar 2024, 10:15 [ UTC - 5; DST ]


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 18:23 
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Should they log the bounce as a touch & go?

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 19:11 
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Should they log the bounce as a touch & go?

I would. :pilot:

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 19:15 
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They learned a lot from this flight and they have a few things to work on.

They need to land a lot slower. They need to get the landing legs to all deploy correctly. They need to fine tune the power output during the landing. And maybe they need to figure out where the fire was coming from during the landing itself; it may not have been the source of the RUSH, but it was pretty clearly an off-nominal event.

#11, you're up!

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 19:19 
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Good analysis by Scott Manley

https://youtu.be/CF9mdMI1qxM

My assessment is that the hard landing damaged something the prevents venting of the oxygen tank. Could be plumbing, wiring, controls, etc, but for whatever reason, the venting of the oxygen tank was not done.

As the oxygen warms up, pressure builds until it the bottom bulkhead fails and pops the rocket into the air.

It will be interesting to know the telemetry for tank pressures during the post landing period, *IF* the telemetry was working.

The main issue here is the lack of adequate deceleration to touch down. That was a hard crunch. I don't think the landing legs not locking was the main cause, the touch down has to be softer than that regardless of the legs.

Mike C.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 19:39 
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So they landed single engine, if they had a twin it would have survived ?


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 19:55 
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So they landed single engine, if they had a twin it would have survived ?

Absolutely.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 19:58 
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Yabbut, centerline thrust, single-engine should be easy.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 20:00 
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As the oxygen warms up, pressure builds until it the bottom bulkhead fails and pops the rocket into the air.

The main issue here is the lack of adequate deceleration to touch down. That was a hard crunch. I don't think the landing legs not locking was the main cause, the touch down has to be softer than that regardless of the legs.

Agreed on the landing velocity, but the legs matter, both for stability and for shock absorption (crush).

The over pressure theory has a lot of merit, but it would have been the Methane tank lower bulkhead that failed. Fuel is in the bottom tank on Starship, oxidizer is amidship.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 20:38 
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Should they log the bounce as a touch & go?

Oh man.... touch and goes in complex, high performance twins- and triplets, etc.
:D


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 22:01 
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Meanwhile, the next day, they recovered the same booster for the 8th time.....for the second time. Like it ain't no thing....


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 22:08 
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Should they log the bounce as a touch & go?


Touch n Gone?...


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 04 Mar 2021, 22:08 
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Meanwhile, the next day, they recovered the same booster for the 8th time.....for the second time. Like it ain't no thing....

Yeah they have that Falcon thing dialed in pretty well. It wasn’t long ago that they couldn’t land one at all and a lot of people were saying they couldn’t do it.

Starship will go the same way. One day it’ll click and they’ll be orbiting them and landing reliably.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 05 Mar 2021, 01:16 
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Meanwhile, the next day, they recovered the same booster for the 8th time.....for the second time. Like it ain't no thing....

Yeah they have that Falcon thing dialed in pretty well. It wasn’t long ago that they couldn’t land one at all and a lot of people were saying they couldn’t do it.

Starship will go the same way. One day it’ll click and they’ll be orbiting them and landing reliably.


Elon is quirky, but I’m starting to like his style. I’d love it for him to partner up with some guys to put Mr Fusion home energy reactors in every garage.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 05 Mar 2021, 02:08 
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Elon is quirky, but I’m starting to like his style. I’d love it for him to partner up with some guys to put Mr Fusion home energy reactors in every garage.


Don’t want any kabooms on that one though :bugeye:


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 05 Mar 2021, 09:07 
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Elon is quirky, but I’m starting to like his style. I’d love it for him to partner up with some guys to put Mr Fusion home energy reactors in every garage.

If he thought it was in any way possible in the near future he'd already be on it. That would come in handy on Mars.

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