Author Topic: SpaceX F9 : Starlink v1.0 Flight 3 : January 29, 2020 - Master Thread (Read 119886 times)

HVM · « **Reply #260 on:** 02/01/2020 06:05 pm »

For reference Iridium NEXT Flight 7 (Teslarati)

meekGee · « **Reply #261 on:** 02/01/2020 07:17 pm »

Quote from: HVM on 02/01/2020 06:05 pm

For reference Iridium NEXT Flight 7 (Teslarati)

Nice. The shading makes it look dented. Hopefully it's also the case here...

Lars-J · « **Reply #262 on:** 02/01/2020 08:56 pm »

Well it certainly wouldn't be the first time people have mis-interpreted dirt and grime as dents and buckles in boosters returning to port.

Better pictures would be needed to prove it.

thirtyone · « **Reply #263 on:** 02/01/2020 08:58 pm »

So someone with more ME experience should correct me (or know the material there on the F9), but my feeling with composites is that there's not a whole lot of room between yield and break points, and it's very unlikely you'd be able to "dent" a composite structure without breaking and cracking it as well. I suspect it's a visual artifact?

mme · « **Reply #264 on:** 02/01/2020 09:18 pm »

Quote from: thirtyone on 02/01/2020 08:58 pm

So someone with more ME experience should correct me (or know the material there on the F9), but my feeling with composites is that there's not a whole lot of room between yield and break points, and it's very unlikely you'd be able to "dent" a composite structure without breaking and cracking it as well. I suspect it's a visual artifact?

The airframe/tankage is an aluminum–lithium alloy. The patterns in the soot really mess with perspective, my bet is it's not bent. We've been down this road many times w.r.t. people thinking boosters were cracked or bent.

FutureSpaceTourist · « **Reply #265 on:** 02/01/2020 10:05 pm »

https://twitter.com/hillco_space/status/1223728857213218816

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Sailing past 1051.3 this afternoon!

https://twitter.com/hillco_space/status/1223728710047674369

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1051.3 from a ship!

sferrin · « **Reply #266 on:** 02/01/2020 10:24 pm »

Looks like a visual artifact. Also, why would SpaceX design crush zones that didn't protect the engines? You slam the engines on the ground what did you actually save? It's a rhetorical question. If the legs didn't buckle then the engines didn't contact the deck.

FutureSpaceTourist · « **Reply #267 on:** 02/01/2020 11:03 pm »

https://twitter.com/acciotardis09/status/1223737064790863872

meekGee · « **Reply #268 on:** 02/02/2020 12:13 am »

Quote from: Lars-J on 02/01/2020 08:56 pm

Well it certainly wouldn't be the first time people have mis-interpreted dirt and grime as dents and buckles in boosters returning to port.

Better pictures would be needed to prove it.

Right, but dismissing it right off hand is just like dismissing the "hard landing" as a figment of the observers' imagination.

A dent is what you'd expect to see if the shock through the leg overwhelmed the frame. (Is there internal bracing between the three attach points?)

On the good-news side, the thing that looks like a dent doesn't quite coincide with where the force would be applied.. It's to the side and below. Making it less likely to be a real thing.

CorvusCorax · « **Reply #269 on:** 02/02/2020 12:22 am »

I'd say, a dent in the tank can only happen while the tank is depressurized. If it was pressurized, any dent would be an instantaneous thing during touchdown and pop back out into round shape immediately once the load returns to normal "no more than the stage's weight".

a split second after engine shutdown the tank would definitely be under full flight pressure - the tanks don't depressurize until F9 goes through its saving procedure after the core has settled - if at all (Do we know for certain the tanks are being vented to ambient while on the barge ?)

so even if the tanks had buckled, you wouldn't see it now. you would see it if they had buckled enough to rupture, because ... well, we know what that looks like... <queue blooper reel>

FutureSpaceTourist · « **Reply #270 on:** 02/02/2020 05:54 pm »

https://twitter.com/julia_bergeron/status/1224015038136115200

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B1051.3 does not appear to be getting much attention today. All four legs appear to still be in place and there is little movement near the stand. #SpaceXFleet

https://twitter.com/julia_bergeron/status/1224027613338984453

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Yeah. I think I'll stay ground level the rest of the day. 😏

FutureSpaceTourist · « **Reply #271 on:** 02/03/2020 06:47 am »

https://twitter.com/13ericralph31/status/1224200149116653570

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Press F for Falcon 9 B1051's landing leg crush cores😂 These two photos were taken from almost identical perspectives by Tom Cross and @RDAnglePhoto after the booster's first and third landings, making the height difference very apparent.

Edit to add: even clearer here

https://twitter.com/kyle_m_photo/status/1224125488219721729

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Crush core comparison shots to see B1051.3's crushed crush cores.

FutureSpaceTourist · « **Reply #272 on:** 02/03/2020 07:55 pm »

Some great aerial shots of booster and OCISLY

twitter.com/spacecoast_stve/status/1224435408345239552

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I went airborne to get a better look at #SpaceX #Falcon9 B1051.3 and #OCISLY. Here are a few shots, including a family portrait, the booster, and work being done on the OCISLY's deck. We all saw the hard landing, but is there damage to the droneship? I can't tell for sure. 🧐

Edit to add:

https://twitter.com/spacecoast_stve/status/1224438078476976128

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When panoramas go all wonky... 😂

FutureSpaceTourist · « **Reply #273 on:** 02/03/2020 08:58 pm »

https://twitter.com/ken_kremer/status/1224449576704151552

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Front landing leg being retracted now 440 pm feb 3 on #SpaceX #falcon9 from #Starlink launch Jan 29- after tear legs raised 1st

FutureSpaceTourist · « **Reply #274 on:** 02/03/2020 11:35 pm »

https://twitter.com/ken_kremer/status/1224484682299068421

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3 landing legs retracted rather well by sunset this evening Feb 3 by crane crews @PortCanaveral - on landed #SpaceX #Falcon9 on #OCISLY from #Starlink launch Jan 29

https://twitter.com/uslaunchreport/status/1224476839772676096

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#SpaceX #B1051.3 Just now the last of four legs retracted. Ready for re- flight

su27k · « **Reply #275 on:** 02/04/2020 03:04 am »

Interesting that they were able to retract legs even when crush core is used.

AndrewRG10 · « **Reply #276 on:** 02/04/2020 03:29 am »

Quote from: su27k on 02/04/2020 03:04 am

Interesting that they were able to retract legs even when crush core is used.

No reason that they shouldn't be able to. Yes they'll need new crush cores but heck they put new crush cores in on CRS-17 at the Port. I haven't seen they did that but crush cores can uncompress when a force works with it like gravity or the tension cords. It can head back, re-extend legs, put new crush cores in, retract again and prepare for Flight #4.

FutureSpaceTourist · « **Reply #277 on:** 02/04/2020 12:31 pm »

https://twitter.com/gregscott_photo/status/1224683573145493513

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Late yesterday afternoon (between 2-6:15pm) #SpaceX retracted each leg on B1051.3 this sequence, in reverse order, showing from all 4 legs down to putting the attachment pin in the last leg just before sundown last night. #NASA #Space

FutureSpaceTourist · « **Reply #278 on:** 02/04/2020 02:32 pm »

https://twitter.com/ken_kremer/status/1224715967344926721

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#SpaceX recovered #Falcon9 #Starlink booster just tilted and lowered horizontal @PortCanaveral moments ago 1010 am feb 4.hi-res pics to follow

FutureSpaceTourist · « **Reply #279 on:** 02/04/2020 05:34 pm »

https://twitter.com/ken_kremer/status/1224751072750850054

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9 #Merlin1D engines & 4 retracted landing legs flush against #Falcon9 B1015.3 during tilting to horizontal op 1010 AM this morning Feb 4 - Up Close look! Despite hard landing on #OCISLY after @SpaceX #Starlink launch Jan 29 #SpaceX @PortCanaveral