71 posts • joined Tuesday 31st January 2012 17:24 GMT
Re: lube points
As per standard for space hardware, that'll be dry lube.
Mine's the one with the MoS2 flask in the pocket.
Those Martians are just peaceful, that's why we can't understand them!
The organized life, ten feet deep in the soil, is very much aware of Curiosity rolling overhead. They have engaged reception,are listening eagerly, letting its alien thought saturate them. But alas - Curiosity's thoughts are as mechanical, as simple, that there's really no satisfying communication possible with it.
Maybe it's time to send out a probe to find Curiosity's creator...
I'd prefer a post rocket
Like this: http://www.astronautix.com/astros/zucker.htm
Delivers letters hot! :-)
Re: 80k km apogee?
Actually it means less delta-V for reducing the inclination of the orbit to zero - i.e. make the sat fly over the equator, rather than wobble between 28° North and South latitude (their launch site being at about 28°N).
You still have to trade that for a bit *more* delta-V needed for the circularisation, as unfortunately there's no practicable way to trading some of that apogee altitude for perigee rising *). Still, it works out in the end.
*) Bootnote: That's because while the energy of an elliptical orbit with a certain semimajor axis may be the same as that of a circular one with the same radius, it's the instantaneous velocity vectors that don't match.
Re: A programming nightmare
Actually, once you accept what it's for, it makes a great programming language for math subjects. You don't have to fiddle with memory allocation, define what type of data a variable holds, or whatever - you just concentrate on your problem, write that into mathematica, and hey presto.
The nice thing about Hyperloop is they don't even want to make a tunnel - they plan to make it a tube on pylons, rather like some natural gas pipelines (only larger). So there are at least useful costing models available. Not saying their calculations are necessarily realistic, but boring through California rock is not involved.
Re: I sort of wondered
Yeah, but are we even sure we all live in the same universe?
It would take quite an excited WIMP...
to strike any of the particles in such an imposing object as a Xenon nucleus! And remember, being WIMPs they can't be excited. So there's your dilemma for you.
Mine's the one with the Xenon flashlight in the pocket.
Millions or billions?
Quote "it was still just a £1.9m revenue company ":
Make that a £1.9bn revenue company, then it's roughly correct. Still would barely register in Apple's earnings curve.
Update: Apparently (according to the German newspaper Tagesspiegel) her secure phone wasn't even hacked, but the one she uses to call people who don't have secure ones - so e.g. for (political) party business.
Nonetheless, given the reactions in Germany today, one has the impression that Angie is not just making a show at being angry. The US ambassador was called in for a talking-to. We'll see if the matter has any more tangible consequences.
Re: Equal Opportunities
Whichever way they did find out, the fact that they did probably is what is keeping their jobs at present. Mind you, we haven't heard about that bug in Downing Street yet, or in the Elysée - oh in fact yes, that's one we did hear about!
Actually she's known to use an encrypted mobile all the time. She does it so much it got to be known as the Merkelphone, and it was a news item when a new generation of them was bought (I think last year) for all the government members and other officials. One might think the crafty Americans used that info to figure out how to hack them.
Which lets me think she'll probably send a three-word text to her purchasing officer.
That's it, one project too many.
The guy is getting as hyperbolic as Mr Stromberg himself. Sure he can pull off many things, or have them pulled off for him; but there's a limit to what even the most wacky genius can handle. Watch him peaking.
Err, last Neanderthals?
I says in the article that these sediments are 47.000 years old, but weren't the remains found in the actual Neanderthal from around 42.000 BC? That would seem to be later.
Re: There's a reason why the OSC Pegasus has an empty manifest.
"Actually some of those nanosats are starting to come with their own albeit limited propulsion systems."
Yep. very limited. Too limited for moving from GTO to LEO. Learn your orbital dynamics.
Re: Re: There's a reason why the OSC Pegasus has an empty manifest.
"here's a *reason* that the space shuttle flew with an embarrassing amount of CPU and memory. Radiation."
That's Space Shuttle, 80's technology. These days, you simply wouldn't go down that route anymore. The trend in satellites and launch vehicles alike (like the Falcon and Japan's Epsilon) is to use decent CPUs and pack them in several mm of metal against the radiation. Incidentally, one reason for that is you can't get the old stuff anymore.
Re: There's a reason why the OSC Pegasus has an empty manifest.
Calm down, John.
It's quite true many smallsats are launched as secondary payloads on big launchers, but that only works if all you need to be is somewhere in space. The trend towards sophisticated nanosatellites with demanding missions brings with it a need to launch these things into dedicated orbits - say sun-syncronous low earth orbits or suchlike - and there are considerably fewer opportunities there. So yes, there will be demand for a micro launcher at some point. How big, and at what price point? Dunno, let the experts figure it out.
BTW, for a micro launcher of today, I'm not sure you'd need much in terms of on-board computer. Maybe a new market for the Rasperry Pi-in-the-Sky?
Why bother with a scramjet? And why worry about the thermal insulation?
You only need a scramjet for this if you want maximum efficiency for maximum dollars. If "feasible and affordable" is the word, launch with a normal turbofan, go to Mach 3.5 or so with that at a reasonable altitude, and do the rest with a rocket. You can always play around with combined cycle a bit, inject some oxygen into the turbofan intake to get you as far as Mach 4 and maybe 50km up or so, but at the end of the day a rocket will do the job best - specially one fed from the same kerosene tank you've been using for that turbofan.
Regarding the thermal insulation, you're talking about a Mach 10 re-entry, not Mach 28. That's a totally different league. Mach 10 can be done with quite solid, light ceramics as demonstrated by the German Shefex-II experiment last year.
Beyond the sky
Go for it, Adam!
There's bound to be a knighthood on the cards in rocketry, somewhere. There was for Hugo Drax.
Armadillo out, Strato in
It appears - from a note published by El Reg on 12 August, no less - that Armadillo Aerospace have all but given up business, due to lack of funding from Mr Carmack. On the other hand, Stratolaunch, another ambitions upstart on a scale almost comparable to that of SpaceX, appear to be actually cutting metal on their carrier plane for a rather large, solid-fuelle launch rocket. If names and technical progress are anything to go by, then that company, with backing from types like Paul Allen behind it (and with Scaled as a partner), while being late to the party, seems to be making quite a showing.
It's clear: Those mountains are hollow!
Surely those icy mountains contain the enormous caves where the children of the Titans live - the Okeanids and other horrible creatures of ages past. Attempt no landing there!
Farmers, accountants, lawyers
These are exactly the sorts of people you a) don't expect to understand, or need to understand, about space science, and b) will stick to a goal once set, without bothering to check if tthe driving forces have changed, or if the stated goal is even still achievable or desirable. So don't ever expect those people to be sympathetic to NASA's changed plans - unless of course some of the Asteroid hunting happens to bring business to their constituencies, in which case there's suddently a good scientific reason to do it. But wait, that's political science, not space science? Oh what the heck, don't even bother!
Re: Re: What happens when a pigeon flies through the beam of a 10kW laser?
Ideally nothing happens to the plane, because the ranging&tracking station had just switched the beam off a minute to a microsecond before contact.
Now, if that was a stealth plane with no radio communications, no published flight plan, no TCAS equipment (that the laser ranging system could listen to) or ADS-B, and no clue about the location of the frikkin' laser (which I guess would be protected by a no-fly zone), at night...
... it would get the 10kW through some 10km or so of atmosphere, passing over its structure at a rate of about 250m/s, and probably warm up a bit.
Re: Lasers, check.
The sharks are too scared. That's because the Brits are already sharpening their space harpoons:
We gotta figure out a way to mind-meld with the sharks first, take their anxiety away. So we're starting with small fish, working out way up.
Mine's the one with the shark tooth buttons.
So, after years of research and development -
WD has found that an axle with bearings at either end is less susceptible to bending than one with just a single bearing? Well done!
Get the carriage and horses ready, Henry, I'm off to Irvine.
I can see...
A house coming on the market in Chelsea, for sale by someone who needs to pay their car insurance.
There, does that make me eerie?
Bliss professorship and Dr King?
So what's this, a King-size battery that's Bliss for mobilie users? Or a Bliss that makes you the King of electric appliances?
At any rate, when I read that the same people who invented it are now looking for ways manufacture it in quantities, I can't help thinking of Buckyballs.
Paris because Bucky isn't around...
BTW, Audi already predicted the future back in 2004!
Don't you remember Will Smith drove an Audi in the "i, Robot" movie? Except for the spherical wheels it looked just like the next generation A6. How's that for predicting?
Should make a dream team with Telefonica
According to today's paper, Telefonica is actually planning to introduce a system that measures your driving style - presumably via your in-car mobile phone - and offers you to use an adaptive insurance premium for that. And it's not planned for some faraway future - it's planned for this year. Apparently, AIG (the insurance company) and Vodafone have similar plans.
Expect insurance premiums to go waaaay up for Audi drivers then! *chuckle*
Re: By "carbon"...
If you can get gaseous carbon out of any metal at 1000° C, you might not be far from a nobel price in chemistry. For information, there's a difference between a substance and its oxides. If you don't believe that, watch what happens to a candle when you oxidise (burn) it; but do so under adult supervision.
As far as I understand after a quick Google search, the US Dept. of Energy has calculated thermal decomposition requires only 5.3% of the heating energy in methane. That could be supplied by burning a part of the hydrogen you've just created, heating up the Flüssigmetallblasensäulenreaktor in the process.
Just think of it: By running a few gazillion fantastitons of natural gas through it, you might produce enough carbon black to re-fill all those empty coal mines, and put the miners back into work! The late Margaret Thatcher would have been amazed. Oh wait - what purpose did coal serve again?
Re: That's FLÜMBLAR, please!
Vell, only if your sentences are unbalanced!
Re: That's FLÜMBLAR, please!
Yeah... easily cönfused, those Inglish. Reminds me of the old joke with the English patriot and the Irishman in the audience.
That's FLÜMBLAR, please!
You English don't seem to have a high regard for German umlauts, which is a pity. If you won't write them when quoting German, how will you ever cope with Finnish or Hungarian? Just wondering.
Re: Missile fuels and testing
Which is possibly just as well for those not directly affected. After all, there are limits to collegial well-wishing.
Re: It IS rocket science...
You're totally right about it really being rocket science; and yes, anything can and will go wrong. That's precisely what they have demonstrated quite publicly (to outsiders, not within NK) withe heir Unha missile a few times.
In fact, their current approach is somewhat comparable to what the Russians (and even the Merkins) did in the 1950s: Trial and error, except the Norks have at least those space powers to copy the theory and basic designs from. They only need to make their own addtional errors. Still, there's nothing to say they may not eventually succeed in making one of those contraptions work.
Missile fuels and testing
Incidentally, UDMH may be stable but it's not altogether friendly. It is both acutely and chronically poisonous, carcinogenic, may damage DNA, is corrosive with some substances, is highly explosive, can be absorbed via the skin, and stinks. It is also one of the most commonly used rocket propellants.
Concerning the missiles, no-one in their right minds would use them without proper prior testing. Not that the Nork leadership need necessarily be collectively in their right minds, but this humble non-expert would rather expect a very public qualification test to come from all of this - sold obviously as a dire warning to the imperialist cowards down south and across the ocean - followed by a conclusion that all was well now, as the imperialists were frightened into desisting from their planned agression. Cocktails (of the moderately poisonous kind) for the generals, everyone else go on as before.
The downside is, assuming the above took place, *after* the test NK could claim to own an operational, intermediate-range missile. Still no cause for concern in the UK, but possibly in Japan and certainly in South Korea (although that would only be one concern among many).
Mine's the one with the UDMH detector in the pocket.
Can't remember where I read it, but apparently they have already planned to back down. It might all come to one test shot of the almighty Musudan missile on or around the first Kim's birthday on 15 April, followed by a declaration that the Merkin and southern aggressors had withdrawn in awe of the Nork's superior firepower; then free additional open-air gymnastics for all, in celebration of yet another victory. Sounds like a reasonably unreasonable plan to me.
Isn't the question really...
Why did this class A type Senior Wilson go supernova 10bn years ago? What or who made him?
Re: Artillery tubes, wiping Seoul...
As far as Wikipedia says, any artillery NK has would have a hard time reaching Seoul from the border - their heaviest 170mm guns seem to have a range of some 50km, and most of their rocket launchers rather less. So yes, they could probably inflict terrible damag - if issued with lots of rounds, and well commanded, and so on and so on.
Regarding their numbers, just consider that - still according to Wikipedia - the Royal Army had some 960 artillery regiments during World War II; apparently, each normally had some 24 guns. That kind of puts things into perspective.
Nonetheless, the recent declarations by the NK army that they had authorized all sorst of action including nuclear strikes, have one thing in common: They come from the army command, not the supreme command. It's kind of like the Joint Chiefs of Staff declaring that they are ready for military action; it would trouble me lots more if the same came from the fat 'Un.
Cold spot in the soup
Eeew, that's nasty. Soup, except gazpacho, isn't supposed to be cold.
So, new task for the world's boffins: Find out the exact recipe! Utensils allowed: Two hadron colliders and a collection of supercomputers. That should keep us Reg readers entertained for a while longer.
It's called experience, not age!
It's science fiction after all, you can expect some decent anti-ageing cream to be available to royalty, can't you?
She certainly looks much better than Harrison Ford these days.
Re: The most interesting question is...
Given that the comets who visit Earth have probably spent the last couple of million millenia in the Oort cloud, in an environment where even hydrogen freezes, it'll be a plucky lifeform that came from there. Maybe a Scot?
Anyway, the soonest clue should come from ESA's Rosetta mission, which, though it doesn't take a comet sample to a lab, will take the lab to the comet around this time next year, and hopefully will give us a better understanding of the sorts of stuff we find there - always assuming the hypothetical Scottish comet-dwellers don't eat it first.
Funny if you think...
that - by a very rough estimate - you could feed all of Great Britain for a couple of days with the load carried by one such ship. And there's a lot more than one of comparable size berthing at British ports each day (including non-food ones of course). Kinda puts international trade into perspective.
Then again, we don't all want to live on beans...
Came with a tutorial!
I remember my uncle let me learn to use Lotus on his work computer (anyone remember Compaq?). It came with an extremely well-written tutorial that let you progress naturally from simple functions to more complex ones, gave you some examples where you could play around with the numbers, in short, it provided a half-playful introduction into the software. At the end of an hour or so, I felt like an expert at using it. Not something I've often experienced since then.
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