Author Topic: Starship Epoch Ecosystem Tweet History - UPDATES  (Read 476360 times)

Online FutureSpaceTourist

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #220 on: 08/11/2020 07:29 pm »
August 11th 2020 Updates:  SN6, SN7 & SN8 Plans

https://twitter.com/elonmusk/status/1293249680445526018
Tweet Contents:  SN 5 & 6 at Starship Production Complex in Texas

https://twitter.com/elonmusk/status/1293250108436488194
Tweet Contents:  SN7 will be new alloy test tank taken to burst pressure. SN8 will have body flaps & nosecone.

https://twitter.com/elonmusk/status/1293250823296884746
Tweet Contents:  Wow!! Are these different heat shields on each vehicle? Are you still experimenting with materials/welding technique for the tiles?
Same hex tiles, slightly different mounting method. Need bigger sections of tiles to see how they hold up with cryo shrinkage, pressure expansion & body bending.

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #221 on: 08/14/2020 07:09 am »
August 13th 2020 Updates:  Starship fairing

https://twitter.com/elonmusk/status/1294068379049893888
Tweet Contents:  Here is a graphic I made of America's Fairings! Looks like we're going to be bringing some big stuff to space (and the Moon).

All the fairings shown are scale to one another.
Starship fairing will actually have more height than shown here. Dome will be flatter & more of tip is accessible. Usable volume ~1000 cubic meters.

Edit to add:

https://twitter.com/elonmusk/status/1294179175310356481
Tweet Contents:  Will there still be a header tank up in the nose on later Starships?
Yes, integrated with the tip of the nose
« Last Edit: 08/14/2020 07:51 am by FutureSpaceTourist »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #222 on: 08/17/2020 09:41 pm »
August 17th 2020 Updates:  SN8, test flight & Raptor updates

https://twitter.com/elonmusk/status/1295473111081447424
Tweet Contents:  With more and more hardware showing up at the construction site, #SN8's 20km hop and belly flop are feeling a little more real, despite how unreal it'll look.
Very impressive render. Note, legs will be bigger & thereíll be way more stuff in engine bay. Main engines actually do majority of work in turning ship vertical before landing.

https://twitter.com/elonmusk/status/1295473654612934656
Tweet Contents:  Another awesome render! I think people might forget how high 20km is! Thatís about twice as high as a commercial airliner flies, so watching Starship bellyflop out of the sky at that altitude will be crazy!!!
Yeah, Starship will be a tiny dot at 20km. Hard to see with naked eye. Weíll do lots of flights.

Edit to add:

https://twitter.com/elonmusk/status/1295495834998513664
Tweet Contents:  Raptor engine just reached 330 bar chamber pressure without exploding!

https://twitter.com/elonmusk/status/1295498964205068289
Tweet Contents:  Nice! What SN are you up to now?
SN40 is about to be tested & has several upgrades over 330 bar engine. For reference, 330 bar on Raptor produces ~225 tons (half a million pounds) of force.
« Last Edit: 08/18/2020 12:41 am by FutureSpaceTourist »

Offline TorenAltair

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #223 on: 08/18/2020 05:42 am »
August 17th 2020 Updates: Raptor followup info
https://mobile.twitter.com/elonmusk/status/1295553672454311941?p=v
Tweet Contents:  Exactly! Merlin for example can deep throttle down to under 40% of its max output (I forget the exact number) thanks largely in part to its pintle injector. Raptor hasnít gone below 50% that Iím aware of and might have a harder time doing so than the Merlin. Exactly! Merlin for example can deep throttle down to under 40% of its max output (I forget the exact number) thanks largely in part to its pintle injector. Raptor hasnít gone below 50% that Iím aware of and might have a harder time doing so than the Merlin.
Max demonstrated Raptor thrust is ~225 tons & min is ~90 tons, so theyíre actually quite similar. Both Merlin & Raptor could throttle way lower with added design complexity. Raptor preburner & Merlin gas generator flameout are what limit lower bound.
« Last Edit: 08/18/2020 07:08 am by FutureSpaceTourist »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #224 on: 08/18/2020 09:03 am »
August 18th 2020 Updates:  Downcomer & Raptor

https://twitter.com/elonmusk/status/1295602798424477696
Tweet Contents:  Elon, will the downcomer from the small tank at the front, be redesigned to allocated more room? Right now it seems to be at the center, taking up space. Could it follow the outer walls of the Starship?
Yes

Edit to add:

https://twitter.com/elonmusk/status/1295907719317204992
Tweet Contents:  Raptors will only do majority of the work flipping on the first couple flights right? Won't the hot gas thrusters do more of the work eventually?
Itís counter-intuitive, but Raptor has so much thrust at high Isp with liquid (high density) propellant & pump-fed (light tanks), that it beats hot gas for the flip. That said, hot gas beats the heck out of N2 for orbital manuevers & stabilizing ship if landing in high winds!
« Last Edit: 08/19/2020 05:52 am by FutureSpaceTourist »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #225 on: 08/19/2020 07:46 pm »
August 19th Updates:  Raptor reuse

https://twitter.com/elonmusk/status/1296158590646939649
Tweet Contents:  Now that youíre at 6 [F9] flights, still think 10 is possible? What do you think will be the limiting factor that will end their service life span?
I donít want be cavalier, but there isnít an obvious limit. 100+ flights are possible. Some parts will need to be replaced or upgraded. Cleaning all 9 Merlin turbines is difficult. Raptor is way easier in this regard, despite being a far more complex engine.

https://twitter.com/elonmusk/status/1296170277899055110
Tweet Contents:  Is Raptor mostly more reuse friendly due to methane burning clean with no soot or does it have more to do with full flow running so cool through each preburner / turbine? I still have a hard time grasping how such high pressure can be better re-use wise, but it seems to somehow!
Not having long chain hydrocarbons & lowering preburner combustion temperature make a big difference

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #226 on: 08/24/2020 06:52 pm »
August 24th 2020 Updates:  SS/SH launch platform

https://twitter.com/elonmusk/status/1297966299671228416
Tweet Contents:  Starship/Super Heavy, which is ~10X mass of Zenit, will mostly launch from ocean spaceports long-term

Edit to add:

https://twitter.com/elonmusk/status/1298019842356703232
Tweet Contents:  Ocean spaceports are coming.

Certainly solves the issue of a herd of Raptors waking the neighbors!
Yeah. Occasional flights from land are ok, but frequent (daily) flights probably need ~30km / 18 miles clear area for noise.

« Last Edit: 08/24/2020 10:14 pm by FutureSpaceTourist »

Offline 50_Caliber

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« Last Edit: 08/24/2020 11:10 pm by 50_Caliber »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #228 on: 08/26/2020 07:32 am »
August 25th 2020 Updates:  Off-Earth Starship Refuelling & Starship Habitat

https://twitter.com/elonmusk/status/1298426245991063554
Tweet Contents:  How will lunar starship refuel? It needs to go back to Earth orbit, and then get refueled by multiple tankers to do that round trip each time right? Canít make methane on the moon sans a large cow farm, right? 😂
Starship propellant is ~78% oxygen, so an O2 plant on the moon would be enough. Otherwise, we could brute-force it with tankers to low Earth orbit. Thatís probably faster.

https://twitter.com/elonmusk/status/1298451580644204546
Tweet Contents:  Elon, for setting up the Sabatier fuel plant for Starship on mars, how many earth launches will be required for full operation? & How many earth launches for setting up a fuel base on moon?
Mars is easier than the moon for propellant production. Could get going with only one ship, where the ship itself is the propellant plant. Needs to make ~2 tons/day.

https://twitter.com/elonmusk/status/1298452372704894979
Tweet Contents:  Would starship be able to lay down on the surface of moon / mars to make a permanent habitat if needed? Linear seems better than vertical for long term use.
No

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #229 on: 08/28/2020 08:07 am »
August 28th 2020 Updates:  Next Starship Event Update, SH and Raptor News

https://twitter.com/elonmusk/status/1299239536535375872
Tweet Contents:  Any update on this yearís Starship event? Still aiming for September? 🚀
Neuralink this month & Tesla next month, SpaceX probably October. We will have made a lot of progress by then. Might have a prototype booster hop done by then.

Edit to add:

https://twitter.com/elonmusk/status/1299373520179216384
Tweet Contents:  For just a booster hop you could probably get away with 3 or 6 Raptors only... But itíll be a while before you have 2 dozen + similar and capable engines for an orbital booster, right?
Only need 2 engines

https://twitter.com/elonmusk/status/1299422160667250689
Tweet Contents:  Raptor reached 230 mT-F (over half a million pounds of thrust) at peak pressure with some damage, so this version of the engine can probably sustain ~210 tons. Should have a 250+ ton engine in about 6 to 9 months. Target for booster is 7500 tons (16.5 million pounds) of thrust.

https://twitter.com/elonmusk/status/1299423127605256194
Tweet Contents:  How is raptor vacuum testing going?
Testing with shorter RVac skirt went well. Full length skirt test coming soon.
« Last Edit: 08/28/2020 07:48 pm by FutureSpaceTourist »

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https://twitter.com/elonmusk/status/1299839516065234944?s=19

Quote
Booster design has shifted to four legs with a wider stance (to avoid engine plume impingement in vacuum), rather than six
My parents was just being born when the Apollo program is over. Why we are still stuck in this stagnation, let's go forward again

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #231 on: 08/30/2020 06:22 am »
August 30th 2020 Updates:  SH Thrust Structure Construction

https://twitter.com/elonmusk/status/1299954063174377474
Tweet Contents:  Thanks for the reply on that. Is there currently a Super Heavy thrust structure being built? I can only imagine the design that needs to go into making something that can support the huge thrust of 30+ Raptors.
Yes. This is the hardest part of the booster design.

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #232 on: 08/31/2020 09:26 pm »
August 31st 2020 Updates:  Elonís remarks to Human to Mars Conference

Full thread at https://forum.nasaspaceflight.com/index.php?topic=51843.0 key Starship related remarks below (reportersí tweets quoting Elon):

https://twitter.com/jeff_foust/status/1300536571565936642
Tweet Contents:  Musk: weíre making good progress on Starship. Key is developing a production system for large-scale manufacturing. Starting construction this week on first booster prototype. #HumanstoMars

https://twitter.com/thesheetztweetz/status/1300536928371183616
Tweet Contents:  Musk: SpaceX is trying to simplify the configuration of Starship's Super Heavy booster, so the engine configuration might end up being 28 instead of 31 engines.

"Still a lot of engines"

https://twitter.com/13ericralph31/status/1300538031175159809
Tweet Contents:  Speaking at the 2020 #HumansToMars virtual conference, @elonmusk says that SpaceX will begin building the first Super Heavy booster (SN1) "this week." Engine count will be reduced to 28 "to simplify the configuration." Outer ring of 20 engines will use 250 ton-thrust Raptors.

https://twitter.com/thesheetztweetz/status/1300537496275750922
Tweet Contents:  SpaceX CEO Elon Musk says the first orbital flight tests of the company's Starship prototype rocket will be "probably next year."

https://twitter.com/joroulette/status/1300539061485088768
Tweet Contents:  Asked how far along Starship cabin development is, Musk says not much, mainly because SpaceX needs to do "hundreds of missions with satellites before we put humans on board."  Super-heavy booster prototype production, on the other hand, begins this week.

twitter.com/13ericralph31/status/1300540565738516480
Tweet Contents:  @elonmusk: "It's within the realm of possibility" that Raptor's thrust-optimized variant can achieve a thrust-to-weight ratio of 200:1. AFAIK, that would be even better than Merlin 1D, which holds the current world record of ~180:1.

https://twitter.com/13ericralph31/status/1300541784422928384
Tweet Contents:  And Musk reiterates that Raptor's ultimate vacuum ISP target is still 380s, close to the physical limit for the O/F ratio Raptor operates at.
« Last Edit: 08/31/2020 09:37 pm by FutureSpaceTourist »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #233 on: 09/01/2020 08:06 am »
September 1st 2020 Updates:  More from Elon on SS / SH / Raptor evolution

https://twitter.com/elonmusk/status/1300698709240487936
Tweet Contents:  @elonmusk Elon how are you avoiding resonance frequencies on you build?
Just go through resonant modes fast. Itís when you hang out there that problems arise.

https://twitter.com/elonmusk/status/1300698052026683394
Tweet Contents:  TWR of an engine is a pretty difficult measurement to pin down, and ultimately isn't that good of a metric. Do you include TVC hardware? Do you include the fuel that has to be inside the engine while operational? Ultimately a rocket has a TWR, but you can't define W for engines.
The outer ring of booster engines (20 of 28) have no TVC actuators. Steering control comes from center 8 TVC & differential throttle of outer engines. By any measure, the high thrust variant of Raptor will probably have the high T/W of any engine ever.

https://twitter.com/elonmusk/status/1300699036505247744
Tweet Contents:  So only 28 engines are needed now because of the higher thrust of the Raptor? @elonmusk
Yeah

https://twitter.com/elonmusk/status/1300700639786340353
Tweet Contents:  Over time, outer 20 will have ~300 tons of thrust & inner 8 ~210, so roughly 7500 tons total at sea level or 1.5 T/W for booster+ship

[So I think Elon was just trolling us when he said no Starship update in September  :D ]
« Last Edit: 09/01/2020 08:10 am by FutureSpaceTourist »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #234 on: 09/03/2020 11:43 pm »
September 3rd 2020 Updates:  SN6 hop

https://twitter.com/elonmusk/status/1301666289249857537
Tweet Contents:  Starship SN6 flew asimilar hop to SN5, but it was a much smoother & faster operation

Edit to add:

https://twitter.com/spacex/status/1301718836563947522
Tweet Contents:  Second 150m flight test of Starship
« Last Edit: 09/04/2020 06:22 am by FutureSpaceTourist »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #235 on: 09/05/2020 12:21 am »
September 4th 2020 Updates:  First Raptor Vacuum Engine

https://twitter.com/spacex/status/1302038129990279168
Tweet Contents:  The first Raptor Vacuum engine (RVac) for Starship has shipped from SpaceXís rocket factory in Hawthorne, California to our development facility in McGregor, Texas

https://twitter.com/elonmusk/status/1302069036621033472
Tweet Contents:  Worth noting that thrust is only slightly higher with the big bell nozzle version. Larger bell is primarily for efficiency in vacuum. Aiming for 380+ sec Isp for RVac long-term. Initially likely to be ~372.

https://twitter.com/elonmusk/status/1302075071398199296
Tweet Contents:  Elon, are those hinges required for thrust vectoring at the very top? Will those be used for mounting on the test stand?
This is a test engine. Flight articles are fixed with no gimbal.

https://twitter.com/elonmusk/status/1302096802687188993
Tweet Contents:. Odds of it surviving its first test? 🤔 Pretty confident it'll work perfectly or is the first run of a new nozzle design pretty risky with a low chance of success?
Above 50% likely to make it
« Last Edit: 09/05/2020 08:22 am by FutureSpaceTourist »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #236 on: 09/09/2020 12:55 am »
September 8th 2020 Updates:  Raptor nozzle shape

https://twitter.com/elonmusk/status/1303493547832668160
Tweet Contents:  Why donít more sea level engines utilize the RS-25ís slightly curved in nozzle design that allows for a really high expansion ratio at sea level? This RapVac almost has that similar shape, but itís curious itís not employed more often.
Weíre pretty close to the manufacturing size limit for a milled copper & steel jacket nozzle. Lot of complexity to add a nozzle extension to a sea level engine for small gain. Also hard to fit bigger engine nozzles on the booster.

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #237 on: 09/12/2020 05:43 pm »
September 12th 2020 Updates:  SN8 update

twitter.com/elonmusk/status/1304836575075819520
Tweet Contents:  SN8 Starship with flaps & nosecone should be done in about a week. Then static fire, checkouts, static fire, fly to 60,000 ft & back.

https://twitter.com/elonmusk/status/1304837274429829121
Tweet Contents:  One way or another, excitement guaranteed! Support of greater Boca, Padre, Brownsville community is very much appreciated.

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #238 on: 09/15/2020 01:58 am »
September 14th 2020 Updates:  SN8 and beyond

https://twitter.com/elonmusk/status/1305683470107148288
Tweet Contents:  You know itís Endgame when SN8 does this.
Pretty accurate simulation, although SN8 will use 3 Raptors. If SN8 craters, SN9 & SN10 are close behind. High production rate allows for fast iteration.

https://twitter.com/elonmusk/status/1305684908980031488
Tweet Contents:  It's nuts now! SN8, 9, 10 and 11! what SN Starship do you think could reach orbit first when SpaceX begins to do orbital tests?
Just a guess, but probably mid teens. Booster & stacking on orbital pad are likely limiting factors. Weíll build several ships just to improve the production system.
« Last Edit: 09/15/2020 02:24 am by FutureSpaceTourist »

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Re: Starship Epoch Ecosystem Tweet Index and History - UPDATES
« Reply #239 on: 09/21/2020 08:58 pm »
September 21st 2020 Updates:  Starship landing flaps and new legs

https://twitter.com/elonmusk/status/1308147358568337408
Tweet Contents:  Here is a render of @SpaceX Starship landing burn after a belly flop, flaps still folded. Will the Starship aft flaps stay folded after the flip maneuver @elonmusk ?
Most likely, all flaps will fold after landing to reduce wind tip over force. There may be some cases where flaps deployed help stability (change in wind direction), in which case one or more flaps will extend.

https://twitter.com/elonmusk/status/1308147514730622977
Tweet Contents:  We really need better legs for Starship. Theyíre coming.
« Last Edit: 09/21/2020 08:59 pm by FutureSpaceTourist »

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