SpaceX
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Elon on Twitter: Bottom half of Starship at night. Top half with forward fins & header tanks probably stacks on Wednesday. Three Raptors already installed.
https://twitter.com/elonmusk/status/1176009047729954818?s=21

Submitted September 23, 2019 at 07:45AM by failion_V2
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Eastbound F9 core spotted, and it survived a tornado!
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Submitted September 24, 2019 at 05:36PM by codercotton
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A discussion with a scientific expert on Arcadia Planitia about what the area is like and why SpaceX might want to land there (WeMartians Podcast)
https://ift.tt/2lmSV17

Submitted September 24, 2019 at 03:16PM by wemartians
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Everyday Astronaut explaining how flaps control flight (twitter video), followed by informative Elon tweets
Everyday Astronaut explaining how flaps control flight (twitter video)
Elon: That’s correct. Essentially controlled falling, like a skydiver.Viv: ... but what's used to actuate the fins? Some kind of small motor?
Elon: Many powerful electric motors & batteries. Force required is enormous, as entire fin moves. More about this on the 28th.Elon: It does actually generate lift in hypersonic regime, which is important to limit peak heating
EA: Pop back out of the dense atmosphere to radiate heat away and then drop back in 🤔 awesome! ...
Elon: Better just to ride your max temp all the way down & let T^4 be your friend. Lower atmosphere cools you down real fast, so not crazy hot after landing.Oran Maliphant : Is “sweating” methane still an option?
Elon: Could do it, but we developed low cost reusable tiles that are much lighter than transpiration cooling & quite robust
\ok, I was steadfast that Elon's statements said nothing about future use of transpirational cooling, I will concede that this is not a defensible position anymore, ha ha])Scott Manley: And just like that I need to rebuild some of my descent models. So the AoA won't be 90 degrees, it'll provide lift to keep vehicle out of denser atmosphere until it loses enough speed.
Elon: Exactly. For reusable heatshield, minimize peak heating. For ablative/expendable, minimize total heat. Therefore reusable like Starship wants lift during high Mach reentry for lower peak, but higher total heat.ShadowZone: So this increases the probability of Starship having to do multiple aerobrake passes when going to Mars or returning, correct?
Elon: For sure more than one pass coming back to Earth. To Mars could maybe work single pass, but two passes probably wise.​[Or discuss on r/SpaceXLounge post or Starship thread]

Submitted September 24, 2019 at 08:57PM by RegularRandomZ
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Homeowners reject SpaceX buyout offer
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Submitted September 25, 2019 at 04:57AM by Wetmelon
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SpaceX can't force anyone to leave, but the Cameron County Spaceport Development Corporation can
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Submitted September 26, 2019 at 03:39AM by a_hero_like_me
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r/SpaceX Starship Presentation Official Discussion & Updates Thread
Welcome to the r/SpaceX Starship Presentation Official Discussion & Updates ThreadThis is the r/SpaceX modteam hosting the Starship Update presentation for you!Constructionpicture by Twitter: @BocaChicaGalFor more informations on the construction of Starship and Starhopper visit the development threadQuickFactsDate28th September 2019TimeTBALocationBoca Chica, TexasSpeakersElon MuskTimelineTimeUpdateWhat do we know yet?Elon Musk is going to present updates on the development of the Starship & Superheavy Launcher on September 28th, the day SpaceX reached orbit 11 years ago. The presentation will be held at Boca Chica, Texas.WebcastsYoutube SpaceX ChannelLinks & ResourcesComing soonParticipate in the discussion!First of all, launch threads are party threads! We understand everyone is excited, so we relax the rules in these venues. The most important thing is that everyone enjoy themselvesPlease constrain the launch party to this thread alone. We will remove low effort comments elsewhere!Real-time chat on our official Internet Relay Chat (IRC) #SpaceX on SnoonetPlease post small launch updates, discussions, and questions here, rather than as a separate post. Thanks!Wanna talk about other SpaceX stuff in a more relaxed atmosphere? Head over to r/SpaceXLounge

Submitted September 26, 2019 at 05:26PM by ElongatedMuskrat
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Elon Musk on Twitter: Three Raptors on a Starship
https://twitter.com/elonmusk/status/1177314408604680192

Submitted September 26, 2019 at 10:10PM by labtec901
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On Regenerative Cooling: "Raptor uses milled copper channels with an inconel jacket all the way down"
https://twitter.com/elonmusk/status/1177387141116002304

Submitted September 27, 2019 at 03:47AM by vinodjetley
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We’ve been focusing on production (now on SN12). Only need 250 bar or even a bit less for Starship/Super Heavy. Anything above 250 is nice to have & we’ll get around to it, but not needed for flight.
https://twitter.com/elonmusk/status/1177622466727821312

Submitted September 27, 2019 at 06:47PM by 675longtail
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Starship MK1 Has just been stacked, credits to Lab Padre.
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Submitted September 27, 2019 at 07:48PM by DragonMarsBG
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Starship Halves Being Joined
https://twitter.com/elonmusk/status/1177662806117584896?s=21

Submitted September 27, 2019 at 09:15PM by Justinackermannblog
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