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by Maui
Wed Dec 05, 2018 6:25 pm
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

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...
by Maui
Sat Nov 17, 2018 11:16 pm
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

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”)
by Maui
Fri Nov 16, 2018 5:23 pm
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

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...
by Maui
Fri Nov 16, 2018 6:25 am
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

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/
by Maui
Mon Oct 08, 2018 1:45 pm
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

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/
by Maui
Tue Oct 02, 2018 5:12 pm
Forum: News
Topic: More Helion Energy news....
Replies: 203
Views: 70176

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...
by Maui
Thu Sep 27, 2018 10:48 pm
Forum: News
Topic: NantEnergy announces zinc-air battery
Replies: 6
Views: 1737

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...
by Maui
Thu Sep 27, 2018 6:33 pm
Forum: News
Topic: NantEnergy announces zinc-air battery
Replies: 6
Views: 1737

Re: NantEnergy announces zinc-air battery

Also 1500 installations and 6 years of field testing? Could be legit?
by Maui
Thu Sep 27, 2018 2:44 am
Forum: News
Topic: 2018 NIAC Symposium
Replies: 9
Views: 1768

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...
by Maui
Wed Sep 26, 2018 10:14 pm
Forum: News
Topic: 2018 NIAC Symposium
Replies: 9
Views: 1768

Re: 2018 NIAC Symposium

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.

Hmmm. Does this interfere with the concept of independent validation?
by Maui
Fri Sep 21, 2018 5:54 pm
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

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...
by Maui
Wed Sep 19, 2018 2:15 am
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

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...
by Maui
Tue Sep 18, 2018 11:55 pm
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

Re: SpaceX News

Did the previous designs actually address legs? My recollection is that there was talk that it would "snap into" docking connector on the pad on Earth. I think it may have been glossed over how legs would work without such a pad/dock available. Based on yesterday's info from Musk, it sound...
by Maui
Tue Sep 18, 2018 5:45 pm
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

Re: SpaceX News

Who is inventing details? Do you have a good reason to know Musk is wrong when he states the new design is riskier? Aside from that, I'm trying to work out your ground rules here... quotes irrelevant to my point are preferable to ones that spell out my concern almost verbatim? Is there some further ...
by Maui
Tue Sep 18, 2018 1:13 pm
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 318308

Re: SpaceX News

“Prior to this the idea was to decouple the legs from the wings. This wasn’t very aesthetic, so now we have 3 large legs/wings that actuate. It is slightly more risky because we are combining multiple functions together”

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