Just a warning, there's VAT to be added to the £2.99 so £3.59 total for UKians...
281 posts • joined 28 May 2008
Re: Turtles all the way down
> man whose writing desk had 6 monitors on it
When asked in an interview "Why does your desk have six monitors?" he replied "Because I don't have room for eight"
Re: Kiss Me Deadly
That's the reason for the Stirling generator, much more efficient converting the heat to electricity but at the expense of having moving parts which might fail.
If at first you don't succeed...
We may now have to wait until April for the next recovery attempt. There's a launch due on Feb 27th which is a heavy payload so won't have the fuel margin for a recovery attempt, and I believe the same applies to the Turkmensat launch due in late March. Jason 3 on March 31st is going up from Vandenberg which would probably need the "Of Course I Still Love You" to be ready, so it's the Dragon to the ISS currently due up on April 8th for the next try.
Re: how did they resist
S'OK, they refered to it as an astrological first to make up for it...
Hold which scrubs the launch for tonight. Range tracking issue.
Ask again when Facebook starts exporting decent fortified wine...
Wouldn't a small drogue chute make sense
This is what the grid fins are for, with the added benefit over a chute of helping with the steering.
Wonder if it caught a landing leg on one of the containers at that corner and blow-torched the surrounding area with the engine as it tipped? That could lead to the pieces lying where they are on the deck.
Re: A valiant effert none the less.
They've got a pretty good idea of what will need to be checked and replaced from the Grasshopper tests. The first few stages to be recovered will be completely dismantled and inspected to confirm that, and to check what has been affected by the stresses of a full bore flight rather than the relatively gentle up and down of Grasshopper and its successors.
Actually the rest of the first stage is largely Ukrainian.
Suranne Jones? "I may not have always taken you where you wanted to go, but I always took you where you needed to be"
Re: I'm curious
If you need to slow down enough to enter orbit when you get back to Earth, you have to haul the fuel to do that with you to Mars and back. You also need extra fuel to accelerate that fuel out of Mars orbit to get back, and extra fuel to decelerate both those quantities of fuel into Mars orbit when you get there, and still more to accelerate all three lots of fuel out of Earth orbit and towards mars in the first place.
Much less mass requirement to take your re-entry vehicle along with you, not bother with getting into Earth orbit when you get back, and use a beefy heat shield to re-enter directly.
Fixed bars bad
Dump the fixed menu bar or if you won't get rid of it at least give it a permanent hide setting. The only thing it does is make you lose a line or two when you page down and breaks the reading flow as you jog back and forth.
Re: 'over 50 years after it managed to make human footprints on the Moon. '.....The End.
"If you have to ask how much, you can't afford it"
Going through the belts is really a side issue, what they want to do is give the heat shield a good thrashing and for that the higher you go the faster the re-entry is. For LEO you're going around 17,500mph when you hit atmosphere, coming back from the moon or beyond it's more like 25,000mph.
That's Mr "I'm my own grandpa" Fry of course.
Re: Information please
Not for a while, best displays seem to be a year or two after perihelion and at the moment the comet is around aphelion. Last perihelion was 1998 so watch the skies 2031-2034ish...
As it says, bits of the comet with a 747 to give an idea of scale.
Makes sense from the images. If you look at the picture of the incident, eg on http://www.space-travel.com/reports/Probe_of_US_spaceship_crash_may_take_year_999.html and now treat SS2 as being upside down and backwards you've got the engine still firing at the top and the tail booms deployed either side. The feathered configuration is supposed to hold the nose up during re-entry so the base of the ship is maximising the cross section, deploying while the engine is running is lilely to send you into a very tight loop the loop.
Re: Why do the play-by-play announces ALWAYS downplay these?
Because the console operators usually only have screenfuls of numbers to look at, all they see is that the information they're getting is very odd or has stopped.
The SpaceX one was a first stage problem. They lost an engine on the way up so the other 8 ran longer, that left everything in slightly the wrong position so they couldn't do the second burn after the Dragon separated to get the Orbcomm secondary payload in the right orbit.
First stage engine problems aren't unusual, but they frequently show up before the rocket has left the ground so everything gets shut down and can be fixed.
There was a Progress launch due around ten past seven this morning. They might just have had time to get a few copies of said Newspaper Shaped Object on board.
Re: Russian conspiracy?
Not just the same as, they're actual engines built for the N1 before it was cancelled that have been in storage ever since. Another one exploded on the test stand recently.
Re: Probably a question for http://what-if.xkcd.com/
They don't push at all, just move it out and let go. The attitude at release is carefully worked out so the Dragon can fire thrusters without the plumes hitting the station.
I've been trying to find out if it does Qi (or any other form of wireless) charging. It's so nice with my Mk II Nexus 7 to just drop it on the pad instead of having to fiddle with micro-USB late at night.
"Would work better with a more Donna-like character"
This. Much, much better.
>> Yup, second fittest assistant ever.
>>The fittest being another Louise, Jameson, playing the scantilly clad Leela.
> Sarah-Jane was the godess!
Bah, bunch of youngsters who never saw Wendy Padbury as Zoe the lot of you...
Although for the ISS you'd probably be better off 3d printing a small crossbow. You could print the bolts for it too and there would be less chance of putting a hole in a module when it goes off accidentally in the struggle.
Shirley a double brace is a mere four rather than eight?
brace noun (PAIR)
› [C] (plural brace) two things of the same type, especially two wild birds that have been killed for sport or food: a brace of pheasants
Randall Munroe, the *Hugo winning and* much-loved creator of awesome science webcomic XKCD
Time (http://xkcd.com/1190/) got him the Best Graphic Story award a couple of weeks ago.
Re: Sharon T. Pokeworthy...
0208 811 8181 was W12 8QT, though 01 811 8055 was the one true number for there...
Internally at TV Centre 4050 was the extension everyone called.
Rather than mugs with the same version of the patch on each side, one version one side and the other on the other?
Next time you see a Lanc, remember its wingspan is a gnats over 100ft so when flying a dam buster attack run the height above water was about the same as the distance from one wingtip to the inboard engine the other side...
Re: Possessing an image likely to cause injury
It's the act of creating the image potentially causing injury I believe. Posession of the image counts as encouragement to make more.
Re: Questions for rocket scientists:
The Dawn spacecraft, currently in transit twixt Vesta and Ceres has two 18 sq. metre solar arrays which combined produce 10kW at 1AU and 1300W 3AU out in the Asteroid Belt. Inverse square and that's about what you'd need for 2.5kW at Mars distance.
Earth to Mars takes around 9 or 10 months on the cheapest ballistic transfer orbit depending on exactly when in the launch window they're sent, the Indian and Nasa probes launched back in November are due to arrive this September. Even quite modest continuous thrust can cut that by a lot, but it also greatly extends the launch window so you don't need to wait until the planets are exactly aligned and can launch at almost any time.
Re: "(aka kaboom)"
Although now a later tweet says "Detailed review of rocket telemetry needed to tell if due to initial splashdown or subsequent tip over and body slam" so maybe not so much KaBoom! as Tim-berrrrr!
Rotors v. Rockets
For an actual Mars landing you'd use Rockets instead of Rotors. ElReg SPB already has experience of things like ArduPilot which can handle a wide variety of motors in its quadcopter guise, rotors to rockets might be a bit beyond the usual parameters that need tweaking but not hugely so. They can also use a wide variety of positioning systems, get a fix from existing Mars probes on the way in and an inertial system will get you close enough to your desired boulder-strewn landing spot.
At least it's not a serious Mallard'y.
It's a nice day, I won't need my coat...
Car mechanics. They know *where* to hit a vehicle to make it work again, they just need a range of suitable hitting implements to suit the fault.
If you have a look at the animation there's usually a cover over the connector panel. You need to have a lot of connections to the trunk (power from the solar cells, data connections, etc) as well as to the rocket telemetry on launch. Easier to go round the side of the heatshield than try and run the wires through it. If you look at a picture of the Apollo CSM (eg http://en.wikipedia.org/wiki/File:Apollo_CSM_lunar_orbit.jpg ) you'll see exactly the same setup with the cover over the cables and panel being the lump at the bottom of that picture.
No, insUlation. The solar panels are supposed to fold back over the body during the night to help keep the internals warm enough. The mechanical problem appears to have been that one of them didn't.
As mentioned in the bit about Zinnwaldite, spoil heaps can be useful sources of stuff that was originally uneconomic to extract. Devon Great Consols mine was once the biggest copper producer in the world, then the largest arsenic (The extraction methods for the arsenic can make you shudder) producer. Since the mines closed at the start of the 20th century the spoil has been reworked for Tin, Tungsten, more Copper and more Arsenic as prices and technologies changed.
Re: It looks suspiciously like an AE-35 unit
Actually the computers do like having atmosphere, it's a real bugger keeping them cool without. The ones outside usually have to be hooked in to the ammonia cooling system which also needs regular EVA maintenance.
And Ariadne gets to keep the banner after the flight?
First stage status posted around 22:00 BST on their webcast "Last known state for rocket boost stage is 360 m/s, Mach 1.1, 8.5 km altitude and roll rate close to zero (very important!)" and a few minutes earlier "Falcon reentry burn also good. Waiting for landing data from tracking plane."
It's OK. They'll be using a version old enough to be unaffected...
The Norwegians have previous...
"The film that is so funny that it was banned in Norway!"
Which was of course Life of Brian...