Search found 586 matches
- Sat Jan 05, 2019 3:45 am
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
I dunno— Musk seemed pretty excited about this when he first tweeted about the “delightfully counterintuitive” design change they had in store. Musk seems pretty transparent in expressing his feelings; I’m betting this came from SpaceX, not a NASA compromise.
- Fri Jan 04, 2019 5:28 am
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
Yes steel. AFAIK, the reason he’s tweeted about isre-entry heating, not radiation— but the radiation seems like a fair point too. Steel holds strength in high temps unlike carbon fiber. Rather than use an ablative heat shield, active cooling using fuel as the heat sink. Also, he claims to have a new...
- Fri Jan 04, 2019 12:09 am
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
The demonstrator may end up waiting on a pad, though: https://www.nextbigfuture.com/2019/01/crude-spacex-starhopper-is-70-to-120-days-from-first-test-flight.html?utm_source=spotim&utm_medium=spotim_recirculation&spotim_referrer=recirculation&spot_im_comment_id=sp_APwizggX_153130_c_kjcWPF This thing ...
- Wed Dec 05, 2018 6:25 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
Spoke a little too soon skipjack... EDIT: Made original comment as the booster was spiraling out of control and was picturing a fireball on impact (was hoping not in a bad place). Pretty phenomenal that it apparently actually kept enough control to make a controlled water landing-- can't wait to see...
- Sat Nov 17, 2018 11:16 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
Per tweet today from Musk, there are new radical changes to BFR; BFR is being accelerated in place of Falcon 9 stage 2 reusability.
Guesses anybody? (Hint: Musk says the changes are “counter intuitive”)
Guesses anybody? (Hint: Musk says the changes are “counter intuitive”)
- Fri Nov 16, 2018 5:23 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
National Geographic has an episode of their Mars series out where they go behind the scenes for the Falcon Heavy launch. Definitely worth watching: https://www.nationalgeographic.com/tv/watch/12e413e68c538ba79a298f709efc1607/ Haven't watched that series...any discussion of how said hypothetical fut...
- Fri Nov 16, 2018 6:25 am
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
National Geographic has an episode of their Mars series out where they go behind the scenes for the Falcon Heavy launch. Definitely worth watching: https://www.nationalgeographic.com/tv/w ... 09efc1607/
- Mon Oct 08, 2018 1:45 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
They didn’t even try to catch. No reason was given, but rough seas + night attempt may have been factors.
Awesome time lapse:
https://www.reddit.com/r/interestingasf ... _9_launch/
Awesome time lapse:
https://www.reddit.com/r/interestingasf ... _9_launch/
- Tue Oct 02, 2018 5:12 pm
- Forum: News
- Topic: More Helion Energy news....
- Replies: 359
- Views: 289873
Re: More Helion Energy news....
Nevertheless, the 2018 date is good news (assuming NBF info is not 2 years old). It seems this Seattle Business Magazine story from April is the source for this NBF article; looks like they took a bit of info from that article (including the end-of-year target) and mashed it with existing copy on H...
- Thu Sep 27, 2018 10:48 pm
- Forum: News
- Topic: NantEnergy announces zinc-air battery
- Replies: 6
- Views: 12775
Re: NantEnergy announces zinc-air battery
General ranges via wikipedia: Lithium ion: Energy density: 250–693 W·h/L (0.90–2.43 MJ/L) Specific energy: 100–265 W·h/kg (0.36–0.875 MJ/kg) Zinc air: Energy density: 1480-9780 Wh/L (5.328–35.21 MJ/L) Specific energy: 470 (practical),1370 (theoretical) Wh/kg (1.692, 4.932 MJ/kg) However, the fact th...
- Thu Sep 27, 2018 6:33 pm
- Forum: News
- Topic: NantEnergy announces zinc-air battery
- Replies: 6
- Views: 12775
Re: NantEnergy announces zinc-air battery
Also 1500 installations and 6 years of field testing? Could be legit?
- Thu Sep 27, 2018 2:44 am
- Forum: News
- Topic: 2018 NIAC Symposium
- Replies: 9
- Views: 15529
Re: 2018 NIAC Symposium
I’m a software developer, not a scientist, but I think there’s a strong parallel with the “it works on my machine” phenomenon I’ve experience quite often. Frequently code written on my machine that works great for me ends up not working for a tester (or worse, a customer) because I didn’t account fo...
- Wed Sep 26, 2018 10:14 pm
- Forum: News
- Topic: 2018 NIAC Symposium
- Replies: 9
- Views: 15529
Re: 2018 NIAC Symposium
Hmmm. Does this interfere with the concept of independent validation?Heidi Fearn will be taking a working device to Dresden and will stay with them until they get it working. Dresden had problems with a previous device and published bad results.
- Fri Sep 21, 2018 5:54 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
Pathological skepticism is great! I think everyone could use more skepticism. I am comforted that you all are not concerned by this design change, though no one has really addressed how such a large surface area can be reliably/safely actuated at hypersonic speeds. As an aside, why would separate le...
- Wed Sep 19, 2018 2:15 am
- Forum: News
- Topic: SpaceX News
- Replies: 2328
- Views: 1192563
Re: SpaceX News
Perk, the question was why further design changes were made, and Musk's response was to describe why fins were added (for aesthetics). He said that added risk, but did not go on to describe how that design might reduce risk in any other way. The only part where reduced risk was mentioned was in rega...