Author Topic: Starship Epoch Ecosystem Tweet History - UPDATES (Read 595226 times)

FutureSpaceTourist · « **Reply #260 on:** 12/01/2020 07:40 pm »

December 1st 2020 Updates: Humans on Mars timeline

https://twitter.com/thesheetztweetz/status/1333871203782680577
Tweet Contents: Elon Musk, accepting the @axelspringer award in Berlin, says he is "highly confident" that SpaceX will land humans on Mars "about 6 years from now."

"If we get lucky, maybe 4 years ... we want to send an uncrewed vehicle there in 2 years."

FutureSpaceTourist · « **Reply #261 on:** 12/07/2020 07:17 pm »

December 7th 2020 Updates: SN8 on the pad

https://twitter.com/elonmusk/status/1336041065879580673
Tweet Contents: Out on the pad in South Texas

FutureSpaceTourist · « **Reply #262 on:** 12/09/2020 10:17 pm »

December 9th 2020 Updates: SN8 12.5km flight test

twitter.com/elonmusk/status/1336808486022258688
Tweet Contents: Successful ascent, switchover to header tanks & precise flap control to landing point!

https://twitter.com/elonmusk/status/1336809767574982658
Tweet Contents: Fuel header tank pressure was low during landing burn, causing touchdown velocity to be high & RUD, but we got all the data we needed! Congrats SpaceX team hell yeah!!

https://twitter.com/elonmusk/status/1336810077555019779
Tweet Contents: Mars, here we come!!

Edit to add:

https://twitter.com/elonmusk/status/1336818987389181952
Tweet Contents: Was that engine shutdown on ascent intentional? Did it reached planned apogee? Can’t believe how epic that was 🤯
Yeah, engines did great!

https://twitter.com/elonmusk/status/1336827715291406343
Tweet Contents: That all did so much better than I thought 😂 I can’t believe what I just saw. Speechless. Huge huge congrats to you and the @spacex team! Incredible milestone
SN8 did great! Even reaching apogee would’ve been great, so controlling all way to putting the crater in the right spot was epic!!

https://twitter.com/spacex/status/1336849897987796992
Tweet Contents: Starship landing flip maneuver

FutureSpaceTourist · « **Reply #263 on:** 12/16/2020 05:17 pm »

December 16th 2020 Updates: SN8 flight profile

https://twitter.com/elonmusk/status/1339246278857940992
Tweet Contents: In hindsight we got a TON wrong while watching SN8 because it did SO many things that were completely unusual. @flightclubio and I assumed it would only use as little propellant as possible, but it seems like they really wanted to crawl up to Apogee, so they loaded it!
Far from fully loaded, but we were going slow or the ship would have gone crazy high/far with three engines

https://twitter.com/elonmusk/status/1339248131037417478
Tweet Contents: Sorry, meant fully loaded as in pretty much as three raptors could handle since it lumbered off the pad and burned for over 4 minutes (with shut downs)
The Raptors were well below max thrust or the ship would have blown through the altitude limit. As we hit min throttle point, an engine would shut off.

FutureSpaceTourist · « **Reply #264 on:** 12/24/2020 12:43 am »

December 23rd 2020 Updates: SN8 flight video & SN9 update

https://twitter.com/elonmusk/status/1341914659411161088
Tweet Contents: Recap of Starship SN8 high-altitude flight test → youtu.be/_qwLHlVjRyw
12 story rocket turns off its engines & does a controlled fall

https://twitter.com/elonmusk/status/1341916523288555520
Tweet Contents: It was absolutely amazing! Any major changes needed to keep up the header tank pressure in SN9?
Minor

FutureSpaceTourist · « **Reply #265 on:** 12/24/2020 12:41 pm »

December 24th 2020 Updates: SN10 & SH updates

https://twitter.com/elonmusk/status/1342059900550131714
Tweet Contents: Interesting they are using Pad B this time around. I wonder what the possibility will be of seeing SN10 sitting there on Pad A alongside. 🤣
Coming soon

https://twitter.com/elonmusk/status/1342062363105759232
Tweet Contents: How far out is first Super Heavy hop?
A few months

FutureSpaceTourist · « **Reply #266 on:** 12/30/2020 04:04 pm »

December 30th 2020 Updates: Super Heavy booster landing

https://twitter.com/elonmusk/status/1344327757916868608
Tweet Contents: We’re going to try to catch the Super Heavy Booster with the launch tower arm, using the grid fins to take the load

Edit to add:

https://twitter.com/elonmusk/status/1344342598694047744
Tweet Contents: You’re truly playing Kerbal, The Real-World Edition, aren’t you 😀 Is this mostly to delete weight of legs from the design or any other reason? Will precision/stability of landing be the same or even better than with legs?
Saves mass & cost of legs & enables immediate repositioning of booster on to launch mount — ready to refly in under an hour

https://twitter.com/elonmusk/status/1344342626539954176
Tweet Contents: Also, what implications does this have for droneship landings? Or will all Starship droneships essentially be fully fledged ocean spaceports, including launch mount?
Yes

https://twitter.com/elonmusk/status/1344344378974720000
Tweet Contents: Too much material stress on the landing legs for it to land on the pad by itself?
Legs would certainly work, but best part is no part, best step is no step

https://twitter.com/elonmusk/status/1344347067230027777
Tweet Contents: Yeah, you could build shock absorbers into the launch stand’s arms without having to worry about any weight penalty.
Exactly

FutureSpaceTourist · « **Reply #267 on:** 12/30/2020 06:53 pm »

December 30th Updates: SN9 header tank pressurisation

https://twitter.com/elonmusk/status/1344344855237992448
Tweet Contents: How're you feeling about SN9? What exactly had to be addressed to keep the CH4 tank from losing pressure? Any hardware changes or just software? Header tanks are also back pressurized with GCH4 and GOX, right?
SN9 will press CH4 header tank with helium. Long-term solution is under debate. Not clear what is lightest/simplest.

https://twitter.com/elonmusk/status/1344350420735410177
Tweet Contents: Woahhh 😳... you made a switch TO helium that quickly between SN8 and SN9?!? Amazing that you can just make adjustments on the fly... no offense to traditional companies *cough Boeing* but that would've been a 2 year design change + 4 year delay from the drop (see SLS tank drop)
Production is hard, prototypes are easy. Building ~1000 Starships to create a self-sustaining city on Mars is our mission.

FutureSpaceTourist · « **Reply #268 on:** 01/13/2021 09:01 pm »

January 13th 2021 Updates: SN9 Static Fires

twitter.com/elonmusk/status/1349432529657294848
Tweet Contents: Today at SpaceX is about practicing Starship engine starts. Ship is held down by massive pins while engines are fired. Two starts completed, about to try a third.

https://twitter.com/elonmusk/status/1349473054699769859
Tweet Contents: All three static fires completed & no RUDs!

Edit to add:

https://twitter.com/elonmusk/status/1349478110027280386
Tweet Contents: Awesome milestone! Back to back to back static fires!!!! We’ve never seen that before. Very impressive. And they still haven’t detanked.... think they’ll go for four?! 🤯
Detanking & inspections now. Good progress towards our “Hop in & go to Mars!” goal.

FutureSpaceTourist · « **Reply #269 on:** 01/28/2021 01:14 pm »

January 27th 2021 Updates: Starship aesthetic improvements

https://twitter.com/elonmusk/status/1354700252251615232
Tweet Contents: After days of waiting, the fog finally cleared! Here's a 425 megapixel panorama (33,597 x 12,651 px) of @spacex's starship sn9 today🚀
Flight could be as soon as tomorrow, January 28th🚀
Major esthetics improvements coming

FutureSpaceTourist · « **Reply #270 on:** 01/30/2021 10:11 am »

January 29th 2021 Updates: SN10 test plan

https://twitter.com/elonmusk/status/1355294612324114432
Tweet Contents: Looks like no raptors are currently installed on Starship SN10. @NASASpaceflight
Cryoproof, then install engines

FutureSpaceTourist · « **Reply #271 on:** 01/30/2021 08:36 pm »

January 30th 2021 Updates: SS Thrust/Weight

https://twitter.com/elonmusk/status/1355627125802299393
Tweet Contents: Lunar Starship Full Flight Animation.
Co-produced with the Brilliant @smvllstvrs
T/W will be ~1.5, so it will accelerate unusually fast. High T/W is important for reusable vehicles to make more efficient use of propellant, the primary cost. For expendable rockets, throwing away stages is the primary cost, so optimization is low T/W.

su27k · « **Reply #272 on:** 02/01/2021 03:48 am »

Why choose Methane (tweet was part of a reply to Tom Mueller's role in Raptor development)

https://twitter.com/elonmusk/status/1355953331236077569

Quote

He became a big fan of methane, but was not pushing it initially. That came from me reading about Soviet methane engine tests that got over 380 Isp. At that Isp, a subcooled methane stage gets slightly better delta-V than a hydrogen stage.

FutureSpaceTourist · « **Reply #273 on:** 02/04/2021 07:34 pm »

February 4th 2021 Updates: Landing change for SN10

https://twitter.com/elonmusk/status/1357256507847561217
Tweet Contents: Question: Why only light 2 engines for landing? Any engine failure means loss of vehicle, so you have two single points of failure. Why not light all 3, do the flip, then pick the best two and turn off the other?
We were too dumb

https://twitter.com/elonmusk/status/1357422126161145856
Tweet Contents: Of course, @SpaceX isn't "dumb" as @elonmusk joked, but they definitely are trying to bite off a lot with these early test flights and there's certainly room for improvement. We'll go over how we'll likely see this maneuver evolve and what upgrades we'll see in the future.
It was foolish of us not to start 3 engines & immediately shut down 1, as 2 are needed to land

https://twitter.com/elonmusk/status/1357422799330107393
Tweet Contents: Will these changes be able to be implemented into the SN10 test flight?
Yes

https://twitter.com/elonmusk/status/1357425717500407816
Tweet Contents: Wouldn't it be safer to light 3, and throttle 3 for landing just in case there's 1 engine failure?
Yes, but engines have a min throttle point where there is flameout risk, so landing on 3 engines means high thrust/weight (further away from hover point), which is also risky

Edit to add:

https://twitter.com/elonmusk/status/1357426784279609344
Tweet Contents: So it will be determined which to cut off based on data available right after relight?
Yeah. By default, engine with least lever arm would shut down if all 3 are good.

https://twitter.com/elonmusk/status/1357449138292613124
Tweet Contents: Here's what @elonmusk means by this tweet. [see attached figure]
Yes

FutureSpaceTourist · « **Reply #274 on:** 02/05/2021 07:23 am »

February 5th 2021 Updates: SS landing manoeuvre (continued)

https://twitter.com/elonmusk/status/1357520341355159555
Tweet Contents: Someday the leverage arm won’t matter as much when you go to hot gas thrusters though, right? Those will become a powerful source for the flip and the engines won’t be as necessary, right? Or will the engines always light to aid in the flip even with hot gas thrusters?
Intuitively, it would seem so, but turbopump-fed Raptors have much higher thrust & propellant mass fraction than pressure-fed gas thrusters & they’re already there

https://twitter.com/elonmusk/status/1357520986602680321
Tweet Contents: Higher ISP too

https://twitter.com/elonmusk/status/1357522122915086336
Tweet Contents: So does that mean for the time being you’ll be sticking with cold gas rcs?
Will still use hot gas maneuvering (RCS) thrusters, as ~5X more efficient than nitrogen (300 sec vs 60 sec Isp)

https://twitter.com/elonmusk/status/1357602102189645824
Tweet Contents: Oh right! That makes a lot of sense. I have kind of been snickering to myself thinking you're over there practicing this landing maneuver that will change and be obsolete the second you get hot gas thrusters 😂 Makes sense to continue the turn and burn! I love this stuff!
That said, the ship landing burn has a clear solution. My greatest concern is achieving good payload to orbit with rapid & full reusability, without which we shall forever be confined to Earth.

FutureSpaceTourist · « **Reply #275 on:** 02/08/2021 07:30 am »

February 7th 2021 Updates: Starship priorities

https://twitter.com/elonmusk/status/1358594029101879298
Tweet Contents: What’s your biggest priority with Starship right now? What currently feels like the most uphill battle or most urgent problem to solve?
1. Orbital launch tower that can stack
2. Enough Raptors for orbit booster
3. Improve ship & booster mass

FutureSpaceTourist · « **Reply #276 on:** 02/13/2021 07:40 am »

February 12th 2020 Updates: Raptor Throttling

https://twitter.com/elonmusk/status/1360408418209591296
Tweet Contents: Declan's stuff is SUPER legit!!! Between this video and what I'm working on, I think you'll truly understand what SpaceX is trying to do with this landing profile! (P.S. love your use of Sufjan in this teaser)
Good analysis. We’re working on lowering min throttle of Raptor, so that there is engine redundancy throughout the landing burn.

FutureSpaceTourist · « **Reply #277 on:** 02/14/2021 08:01 am »

February 13th 2021 Updates: SN10 flight success probability

https://twitter.com/elonmusk/status/1360774866023112704
Tweet Contents: So SpaceX is attempting another flight NET this coming week with SN10! Can they master the flip and stick the landing!? That is the big question. What do you think?
(full video explaining more detail at youtu.be/uiT4brKuQGg)
Success on landing probability is ~60% this time

FutureSpaceTourist · « **Reply #278 on:** 02/21/2021 08:33 pm »

February 21st 2021 Updates: SN10 flight this week

https://twitter.com/elonmusk/status/1363600651712794624
Tweet Contents: An aft flap has been deployed on SN10. 🔥🚀🔥
Good chance of flying this week!

FutureSpaceTourist · « **Reply #279 on:** 02/24/2021 07:41 am »

February 24th Updates: Deimos and Phobos updates

https://twitter.com/elonmusk/status/1364470475620044802
Tweet Contents: Will the they have sabatier reactors on them and produce their own propellant or will it be shipped out?
Short-term, CH4 delivered & O2 produced. Propellant is ~78% O2. Long-term, Sabatier reaction to convert CO2 + H2O -> CH4 + O2 using wind & solar power.

https://twitter.com/elonmusk/status/1364476185359642626
Tweet Contents: How long until you think the Deimos and Phobos rigs will be operational?
One of them may be in limited operation by end of year

https://twitter.com/elonmusk/status/1364488368994848769
Tweet Contents: How will Starships be transported to the floating platform? Will these launch platforms be stationed permanently in the gulf?
They will fly there from our launch site.
Stationed around the world.