Author Topic: SpaceX Falcon 9 : CRS-16 (Dragon SpX-16) : December 5, 2018 - DISCUSSION (Read 255679 times)

CraigLieb · « **Reply #120 on:** 12/05/2018 05:37 pm »

Phone screen cap and magnified

chrisking0997 · « **Reply #121 on:** 12/05/2018 05:37 pm »

impressed that it recovered as well as it did. it stood so long Id have to think it would have survived if it had made the LZ

ellindsey · « **Reply #122 on:** 12/05/2018 05:37 pm »

There's already amateur footage of the landing attempt online. It looks like one of the grid fins went hardover and got stuck. Amazingly, the rocket managed to neutralize the roll and perform a soft touchdown anyway, but as it was on water it fell over and ruptured after touching down.

whitelancer64 · « **Reply #123 on:** 12/05/2018 05:38 pm »

Quote from: WithCarbos on 12/05/2018 05:32 pm

https://clips.twitch.tv/AdventurousConcernedGazelleKappaWealth

That's what I was hoping for. Amazing video!!!!

bbell99 · « **Reply #124 on:** 12/05/2018 05:38 pm »

Elon Musk twitter

‏Grid fin hydraulic pump stalled, so Falcon landed just out to sea. Appears to be undamaged & is transmitting data. Recovery ship dispatched.

kevinof · « **Reply #125 on:** 12/05/2018 05:38 pm »

https://twitter.com/elonmusk/status/1070386062164283392

Lars-J · « **Reply #126 on:** 12/05/2018 05:38 pm »

Quote from: sghill on 12/05/2018 05:37 pm

At T+ 7:00, the booster looked like the angle was way off the end of the landing burn. Then, at T+ 7:33, one of the gridfins was cranked all the way over and the other wasn't moving much at all as the spinning started.

It's easier to see both events if you watch the video, but here are two screen grabs.

Being at an angle end the end pf the braking burn is not that unusual in itself. See footage from previous RTLS day landings. But it might have been worse than usual.

ugordan · « **Reply #127 on:** 12/05/2018 05:38 pm »

Well, it was bound to happen eventually.

OnWithTheShow · « **Reply #128 on:** 12/05/2018 05:39 pm »

This gives gives some evidence to the thread on whether stages target to undershoot, overshoot, or center the pad and then vector in after landing burn start up. It seems they may target an undershoot.

Lars-J · « **Reply #129 on:** 12/05/2018 05:39 pm »

Quote from: kevinof on 12/05/2018 05:38 pm

https://twitter.com/elonmusk/status/1070386062164283392

I can't wait to see video of that... amazing if the landing burn was able to get it under semi control from that spin.

chrisking0997 · « **Reply #130 on:** 12/05/2018 05:40 pm »

Quote from: kevinof on 12/05/2018 05:38 pm

https://twitter.com/elonmusk/status/1070386062164283392

...unreal

Tomness · « **Reply #131 on:** 12/05/2018 05:41 pm »

Quote from: Chris Bergin on 12/05/2018 05:35 pm

https://twitter.com/elonmusk/status/1070386062164283392

Hopefully they are able to recover it, not need another Gun Ship from the Air Force

kessdawg · « **Reply #132 on:** 12/05/2018 05:41 pm »

https://twitter.com/elonmusk/status/1070386554068119553

RedLineTrain · « **Reply #133 on:** 12/05/2018 05:41 pm »

Amazing that it is still transmitting after going through that ordeal!

Halidon · « **Reply #134 on:** 12/05/2018 05:42 pm »

Quote from: Tomness on 12/05/2018 05:41 pm

Quote from: Chris Bergin on 12/05/2018 05:35 pm
https://twitter.com/elonmusk/status/1070386062164283392
Hopefully they are able to recover it, not need another Gun Ship from the Air Force

Heh, I think it's a wee bit too close to civilization for that sort of option.

deruch · « **Reply #135 on:** 12/05/2018 05:42 pm »

Quote from: OnWithTheShow on 12/05/2018 05:39 pm

This gives gives some evidence to the thread on whether stages target to undershoot, overshoot, or center the pad and then vector in after landing burn start up. It seems they may target an undershoot.

Or it successfully achieved a divert.

weepingdragon · « **Reply #136 on:** 12/05/2018 05:43 pm »

Before the "exciting stuff" happened had view of some sky writing. Anybody on the ground see what it said? Thought that was going to be something "new" to talk about during "routine" landings.

As far as the the round "ring" that came off. You can definitely see crystallization sticking out. Whether there is a physical object inside the ice or just ice that formed around a circular spot then released? No idea. Will play around with zoom in vlc once downloaded.

VoodooForce · « **Reply #137 on:** 12/05/2018 05:43 pm »

Damn these unflight-proven boosters

kessdawg · « **Reply #138 on:** 12/05/2018 05:43 pm »

Crazy!

https://twitter.com/elonmusk/status/1070387162892259329

ugordan · « **Reply #139 on:** 12/05/2018 05:43 pm »

Quote from: Roy_H on 12/05/2018 05:40 pm

So, did the first stage have enough control left to deliberately divert to the ocean, or was the original trajectory to the ocean with a planned divert to the landing pad only if all was ok?

It likely relied on the lift vector to carry it to shore before landing burn and once it went into an uncontrolled spin, it pretty much went down where the reentry burn targeted it.