Search found 912 matches

by krenshala
Wed Feb 07, 2018 11:29 pm
Forum: News
Topic: SpaceX News
Replies: 2276
Views: 475149

Re: SpaceX News

They did the burn about six hours after launch. It ended up not being a proper Trans-Mars-Injection burn, however. Its more like a Trans-Ceres-Injection burn, clear into the Belt, if not quite to Ceres orbit . I'd call that a success on showing off what its heavy lift rocket design can do, even if t...
by krenshala
Thu Feb 01, 2018 1:53 pm
Forum: General
Topic: Comets can’t explain weird ‘alien megastructure’ star after all
Replies: 29
Views: 26353

Re: Comets can’t explain weird ‘alien megastructure’ star after all

Going from memory, but I thought the issue was a-periodic dips in light, as opposed to increases?
by krenshala
Thu Jan 04, 2018 1:43 pm
Forum: News
Topic: BLP news
Replies: 657
Views: 184961

Re: BLP news

With solid state lithium batteries seemingly inevitable, even if you bought into EEStor, they're close to losing almost all of their advantages. If these advantages ever existed in the first place... Thats his point. Whether EEStor ever really worked is pretty much irrelevant if "normal" ...
by krenshala
Fri Dec 29, 2017 6:14 pm
Forum: News
Topic: SpaceX News
Replies: 2276
Views: 475149

Re: SpaceX News

It is so tempting to take a short notice vacation and "visit my parents" in Eustice FL, "coincidentally" in time to see FH launch. ;)
by krenshala
Fri Dec 22, 2017 7:41 pm
Forum: News
Topic: Unusual Looking Space Rock
Replies: 10
Views: 6251

Re: Unusual Looking Space Rock

It looks like a splatter of mildly viscous matter. Couldn't it just be a spurt of ejecta that cooled into that same original shape it was jettisoned as, and be one of a few/the one stray ejectus that got away? If it was hot enough to be considered plastic, it should have reached hydrostatic equilib...
by krenshala
Fri Dec 15, 2017 11:09 pm
Forum: News
Topic: SpaceX News
Replies: 2276
Views: 475149

Re: SpaceX News

Even without amusing aerobatics, I think we'll hear from the judges when Space X (finally!) starts on their synchronized team flying/landing attempts.
by krenshala
Sat Nov 04, 2017 1:28 pm
Forum: General
Topic: Diamond Is A Semiconductors Best Friend
Replies: 3
Views: 6743

Re: Diamond Is A Semiconductors Best Friend

I see Johan's tongue is as sharp as ever. ;)
by krenshala
Fri Oct 27, 2017 12:31 pm
Forum: General
Topic: Diamond Is A Semiconductors Best Friend
Replies: 3
Views: 6743

Re: Diamond Is A Semiconductors Best Friend

The descriptions in the article remind me of some of the descriptions Johan Prinn (am I remembering his name correctly?) gave for the work he was doing.
by krenshala
Thu Oct 26, 2017 9:20 pm
Forum: News
Topic: SpaceX News
Replies: 2276
Views: 475149

Re: SpaceX News

delta v = v_e * ln( wet mass / dry mass ) If we assume the lower (sea level) Isp of 330s for the raptors, and a 100 metric ton dry mass, then you would need 3020 metric tons of fuel to result in a delta v of 11126.31 m/s. If you change the Isp to the vacuum value (375s) and ignore the presence of a...
by krenshala
Fri Oct 20, 2017 12:12 pm
Forum: News
Topic: SpaceX News
Replies: 2276
Views: 475149

Re: SpaceX News

Even if flight time is bumped up to 1 or 2 hours to mitigate G stresses on the passengers, that would still be significantly better than aircraft for flights traveling more than 1/3 of the way around the globe, and possibly for some shorter distances.
by krenshala
Wed Oct 18, 2017 1:03 pm
Forum: News
Topic: SpaceX News
Replies: 2276
Views: 475149

Re: SpaceX News

Elon just finished an AMA over at Reddit ... perhaps a little tipsy while doing so. Skimming through the top level questions and responses and found this gem from Musk: The advantage of getting somewhere in 30 mins by rocket instead of 15 hours by plane will be negatively affected if "but also...
by krenshala
Fri Oct 13, 2017 9:48 pm
Forum: General
Topic: 2014 only the hottest year on the cooked books...
Replies: 92
Views: 60715

Re: 2014 only the hottest year on the cooked books...

Yes, it is currently spring in the Southern Hemisphere as of ~20 September.
by krenshala
Fri Oct 06, 2017 8:57 pm
Forum: News
Topic: EMC2 news
Replies: 420
Views: 191180

Re: EMC2 news

I am well aware that many people with computer science degrees are highly concerned about code efficiency. My point here is that while it may be desirable, it isn't essential for this purpose that the code be efficient. What is essential is that it gets the physics right, and if you accomplish that...
by krenshala
Wed Oct 04, 2017 10:58 pm
Forum: General
Topic: Skynet is coming.
Replies: 798
Views: 169322

Re: Skynet is coming.

ladajo wrote:The Germans had an HS 293 TV variant. I also think they had another weapon which used TV guidance, however I will have to dig.


It appears the Hs 293D had TV guidance, though the wiki page said it (and the wire-guided variant) did not reach operational status before the end of the war.

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