kerbiloid Posted September 28, 2019 Share Posted September 28, 2019 Spoiler 1 minute ago, CatastrophicFailure said: Thermodynamics does not work like that. They’d need to use liquid helium. And they do have helium. Let their engines blow with jets of liquid helium from the nozzles on splashing landing. Quote Link to comment Share on other sites More sharing options...
tater Posted September 28, 2019 Share Posted September 28, 2019 What sucks is I have to go to a wedding during this talk... course the invite says wedding at 5:30, cocktails at 5:45, then reception... guess I watch after the fact. Quote Link to comment Share on other sites More sharing options...
mikegarrison Posted September 28, 2019 Share Posted September 28, 2019 57 minutes ago, RCgothic said: I work in nuclear engineering. It's not actually very good engineering. Very reliable, but as far from cutting edge as you get. You get away with a lot of sins with a safety factor of x10 and no consideration of mass penalties. We can't afford to fail and so we don't learn much. I bet SpaceX learns loads. One of my favorite quotes about engineering comes from Carroll Smith (author and race car engineer): "an engineer is someone who can do for a dime what any fool can do for a dollar". Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted September 28, 2019 Share Posted September 28, 2019 Sorry to hear that, Tater. Fortunately it looks like I will be home in time to watch it. Also, I just want to say that it is great finally having something space related happen in my time zone so I don't have to convert! Quote Link to comment Share on other sites More sharing options...
magnemoe Posted September 28, 2019 Share Posted September 28, 2019 52 minutes ago, RealKerbal3x said: Attaching the fairings to the landing legs would be a good idea, because the legs would be able to spread out more (increasing the tipping moment) while still remaining protected during reentry. There is the downside of slightly increased complexity, but this idea does remind me of the landing legs on the 2016 ITS design, where the landing feet were part of their own aerodynamic fairing. I guess we’ll have to wait and see what Elon says later. Complicating stuff to much, the fairing is just an cover, use an pad a bit smaller than the cover then hydraulic cylinder to extend it. If lucky part of the hydraulic can double as shock absorbers. Quote Link to comment Share on other sites More sharing options...
Wjolcz Posted September 28, 2019 Share Posted September 28, 2019 (edited) I have a feeling they already did all the math needed to ensure the legs will spread far enough. Given that most of the mass is closer to the bottom than the top it should be stable enough to withstand wind and rapid movement, just like the one experienced on the crawler thingy a couple of days ago. I wouldn't be too worried about this. Edited September 28, 2019 by Wjolcz Quote Link to comment Share on other sites More sharing options...
tater Posted September 28, 2019 Share Posted September 28, 2019 Increases chances I can bail from wedding and watch. Quote Link to comment Share on other sites More sharing options...
Delay Posted September 28, 2019 Share Posted September 28, 2019 10 minutes ago, tater said: Increases chances I can bail from wedding and watch. 100% change it's too late for me. 2 AM was still maneagable! Quote Link to comment Share on other sites More sharing options...
tater Posted September 28, 2019 Share Posted September 28, 2019 Quote Link to comment Share on other sites More sharing options...
Wjolcz Posted September 28, 2019 Share Posted September 28, 2019 Looks like Grasshopper is there too! Quote Link to comment Share on other sites More sharing options...
tater Posted September 28, 2019 Share Posted September 28, 2019 Quote Link to comment Share on other sites More sharing options...
Terwin Posted September 28, 2019 Share Posted September 28, 2019 (edited) 5 hours ago, CatastrophicFailure said: See, now I have a very hard time envisioning a world where SLS and Starship coexist for any length of time. More-so SLS, Starship, and New Glenn. Just pulling numbers outta my patoot, Starship can do 90% of what SLS can for 10% of the cost. Even politically, i think it becomes very difficult to keep justifying that, especially if Starship is doing so once a month while SLS flies once a year. Considering that private companies can go away/under, unless you have a lot of redundancy(probably more than SS+NG), it can still make sense to keep SLS going, even just at a life-support level, to ensure that we do not return to a time when the US cannot put a man in orbit even with both SS and NG making weekly trips to the moon. Considering the size of the US military budget, $1 bln/yr is not a lot to spend on national pride. And that is before you get to any of the political jobs in districts type stuff. As such, I can see SLS lasting well into the 2030's with mandates on military launches making SLS purchases on an ongoing basis. That said, it looks like ~100 min until Elon's address... Edited September 28, 2019 by Terwin just saw time change for address Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted September 28, 2019 Share Posted September 28, 2019 51 minutes ago, Wjolcz said: Looks like Grasshopper is there too! Where? I don't see it. 1 minute ago, Terwin said: That said, it looks like ~40 min until Elon's address They pushed it back an hour because of weather, so an hour and 40 mins Quote Link to comment Share on other sites More sharing options...
cubinator Posted September 29, 2019 Share Posted September 29, 2019 While we wait, have some hype music. https://spaaace.bandcamp.com/track/waiting-for-presentation Quote Link to comment Share on other sites More sharing options...
YNM Posted September 29, 2019 Share Posted September 29, 2019 Livestream on YouTube : Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted September 29, 2019 Share Posted September 29, 2019 (edited) Aaaaaaand delayed 15 minutes. Edited September 29, 2019 by CatastrophicFailure Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted September 29, 2019 Share Posted September 29, 2019 Well, delays and pushbacks are certainly nothing new for SpaceX. Not that there's anything wrong with that... Quote Link to comment Share on other sites More sharing options...
ThatGuyWithALongUsername Posted September 29, 2019 Share Posted September 29, 2019 Funky music time Quote Link to comment Share on other sites More sharing options...
Raven Industries Posted September 29, 2019 Share Posted September 29, 2019 Sounds like they've got a mic set up already, you can hear wind and people talking behind the music. Quote Link to comment Share on other sites More sharing options...
Raven Industries Posted September 29, 2019 Share Posted September 29, 2019 We are live! Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted September 29, 2019 Share Posted September 29, 2019 Batten down the hatches, tweetstorm incoming!!! Quote Link to comment Share on other sites More sharing options...
MinimumSky5 Posted September 29, 2019 Share Posted September 29, 2019 Here's some videos of Falcon 1 and Grasshopper, doing their thing! (Audience claps in appreciation) Wasn't that cool? Let's see our new toy fly! (Audience screams in terror, and rapidly stops being biology and becomes physics) Also, RIP Starman, you will forever be in our hearts! Quote Link to comment Share on other sites More sharing options...
Mad Rocket Scientist Posted September 29, 2019 Share Posted September 29, 2019 Dry mass 120 tons, instead of 85. Quote Link to comment Share on other sites More sharing options...
cubinator Posted September 29, 2019 Share Posted September 29, 2019 Interesting animation of the skydiver motion. The ship really seems to be modeled after a skydiving human as far as control surfaces. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted September 29, 2019 Share Posted September 29, 2019 Good Kerm, I forget how painful he is to watch live. Quote Link to comment Share on other sites More sharing options...
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