Search found 549 matches

by Maui
Mon Oct 08, 2018 1:45 pm
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289200

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: 202
Views: 61757

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: 387

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: 387

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: 464

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: 464

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: 2175
Views: 289200

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: 2175
Views: 289200

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: 2175
Views: 289200

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: 2175
Views: 289200

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: 2175
Views: 289200

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”
by Maui
Tue Sep 18, 2018 3:29 am
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289200

Re: SpaceX News

Disappointed by updated design. Turns out the only significant difference (added fins) were not a result of engineering, but simply that Musk liked the aesthetics more. He even admitted the design was now riskier as a result.

This guy legit scares me now.
by Maui
Mon Sep 17, 2018 5:00 pm
Forum: News
Topic: Small Tri Alpha news blurp
Replies: 150
Views: 43953

Re: Small Tri Alpha news blurp

From the update they gave last year at this time (https://arpa-e.energy.gov/sites/default ... 9_GOTA.pdf)
They were targeting: Ti keV ~1–2 and Te keV ~0.2–1

Looks like they are within both ranges, which is good, though one more than the other.
by Maui
Fri Sep 14, 2018 5:13 pm
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289200

Re: SpaceX News

An exciting update to break the tedium of successful launches today! Moon trip passengers (via BFR) to be announced Monday. Included is a render of an updated BFR design: https://pbs.twimg.com/media/DnA7hZgU8AAxfxC.jpg:orig All engines now look to be sea-level. Speculation is that the skirt around t...
by Maui
Mon Sep 10, 2018 5:34 pm
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289200

Re: SpaceX News

Was surprised to see next on the agenda isn't until Oct6. I had thought things were supposed to be packed in pretty tight this month to the end of the year.

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