What makes you think that makes it any easier? They were probably doing well over 200 knots by then so it's even harder to make a tight turn. For information, a 2G turn at 200 knots (passengers screaming in the back) has a radius of 630 meters.
Trust me, I fly the A320. You don't just yank such a plane around to avoid some birds. When you see them, it's usually already too late. Too much inertia, and you don't know which direction the birds are going to take anyway. During approach, at low speeds, you might consider going around (pulling the nose up and adding full power) but it's a risky decision because it might be preferable to continue the approach with a limp airplane rather than losing engines during a go-around if you didn't manage to miss the birds.
With most bird encounters, we end up missing them. Sometimes we hit one or more, but it has no effect on the airplane. Very rarely, an engine gets seriously damaged. Loss of all engines in an airliner happens once every few decades in the whole world. Now imagine we would "yank the plane around" every time we saw some birds. You would not want to fly on those planes.
No it doesn't. Only a warning system (TCAS) with an avoidance command that is to be followed manually by the pilots. The autopilot completely disregards TCAS.
It's not quite so easy to spot a flock of birds taking off as you reach the critical speed from which you can no longer abort a take-off. The pilot flying the airplane (captain or F/O) does have his or her eyes outside during the take-off roll until lift-off, as this is a completely manual and visual phase. The other pilot is looking at engine parameters, airspeed and a few other instruments and just taking a few occasional glaces outside.
But once you're above the abort speed (v1), there's little you can do about birds. You can't just yank the airplane left or right to avoid them when you're doing 150 knots. We are actually advised not to change our flight path because the birds act in unpredictable ways and violent maneuvers may actually increase the chance of a bird strike with birds dashing off precisely in the same direction you decided to turn towards. Also, it's easier to react to an engine failure if the plane's path is nice and stable rather than while you're violently banking or pitching.
- In 1961, researchers proposed that flying pigs, if they could be found, could be used to replace airplanes. With the rapid technological advances in actual airplanes, though, the research languished for decades - In 1973, new research showed that, if flying pigs would exist, they could be herded in such a way that they airline operations would be made a lot more efficient. - The research then languished again for many years, but recently more progress has been made. Methods have been proposed for actually finding flying pigs by systematically combing through rain forests. Also, more detailed descriptions of what flying pig farms could look like have been produced. - While some still don't take this new field seriously, it does hold enormous promise for revolutionising the aviation industry. Flying pigs would reduce the carbon footprint of aviation to almost zero, so this idea becomes more and more attractive, even inevitable. - It would only take a single scientific breakthrough to make this all possible: finding an actual flying pig. But given the growing amount of interest in this field, it should be only a matter of time.
I love the way they describe the X-37B, as a platform for perfectly normal scientific experiments, nothing more, yet the trajectory is classified. Yeah, right.
I'm not sure whether or not I understood your "solution", but if I did, I don't think it works quite as easily as you suggest.
What I think you proposed, was dividing the larger board into a grid of sub-grids, and then just filling them in recursively (so, for example, to get a 64x64 solution, start with an 8x8 solution, replace each empty square with an empty 8x8 grid inside of it, and each queen with an 8x8 solution). If that's your method, it doesn't work because the diagonals on the higher order board spill over into adjacent squares, therefore no longer guaranteeing a conflict-free setup. A queen on the 64x64 grid can conflict with another queen which, in the original 8x8 supergrid, is a knight's jump away.
Or maybe you were doing it differently?
Anyway, as you suggested, solving nxn is not really what they're looking for. The problem is completing an nxn board with a number of queens already fixed on the board.
100% of 0 is 0. Nothing wrong with that. Just because there are no more desktops doesn't mean that the term "desktop" has become undefined.
100% of all naturally flying pink elephants are capable of telepathy. That's a perfectly correct statement.
(With "naturally flying pink elephants", I mean excluding those painted pink and launched by catapult, obviously. Although those might somehow gain telepathic skills, you never know, it's worth a shot, but I digress)
Nope, that isn't even remotely in the right ball park. The number of people alive today is about 7% of the total number of people that have ever lived, according to some estimates.
In a near vacuum it's about the same as at higher pressure at the same temperature. Obviously it makes no sense in a total vacuum, but then just take the speed of sound outside the tube.
This was a bunch of students doing this for a project, and it reached that speed on a 1.7 km test track. With a longer track and more budget, they expect to go supersonic eventually. This is nowhere near a finished product, so don't compare it to one.
Why is everyone so pessimistic about everything Musk does? Even here on a supposed nerd site? Jeez, I know the guy uses a lot of hyperbole and has impossible ideas like, say, landing rockets on barges (o, wait, that actually worked) or making usable electric family cars that outperform two seat supercar monsters (o wait, he did that too). Maybe just see where this idea goes? We need more people like him, billionaires that are not afraid to push boundaries and try new things that may well fail but might just make a huge difference in the world, instead of just buying big yachts. I know he's crazy. That's what makes all the difference in this world of paralysing risk averseness.
Well, for the Cirrus Vision SF50 it was considered an acceptable risk, apparently. And I imagine you'll still be able to glide in a safe direction before deploying the parachute. Also, this "Air Taxi" has so many separate engines, with probably lots of control redundancy built in as well, that it's unlikely that everything would fail together. The parachute would really be a very last ditch option.
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What makes you think that makes it any easier? They were probably doing well over 200 knots by then so it's even harder to make a tight turn. For information, a 2G turn at 200 knots (passengers screaming in the back) has a radius of 630 meters.
Trust me, I fly the A320. You don't just yank such a plane around to avoid some birds. When you see them, it's usually already too late. Too much inertia, and you don't know which direction the birds are going to take anyway. During approach, at low speeds, you might consider going around (pulling the nose up and adding full power) but it's a risky decision because it might be preferable to continue the approach with a limp airplane rather than losing engines during a go-around if you didn't manage to miss the birds.
With most bird encounters, we end up missing them. Sometimes we hit one or more, but it has no effect on the airplane. Very rarely, an engine gets seriously damaged. Loss of all engines in an airliner happens once every few decades in the whole world. Now imagine we would "yank the plane around" every time we saw some birds. You would not want to fly on those planes.
No it doesn't. Only a warning system (TCAS) with an avoidance command that is to be followed manually by the pilots. The autopilot completely disregards TCAS.
It's not quite so easy to spot a flock of birds taking off as you reach the critical speed from which you can no longer abort a take-off. The pilot flying the airplane (captain or F/O) does have his or her eyes outside during the take-off roll until lift-off, as this is a completely manual and visual phase. The other pilot is looking at engine parameters, airspeed and a few other instruments and just taking a few occasional glaces outside.
But once you're above the abort speed (v1), there's little you can do about birds. You can't just yank the airplane left or right to avoid them when you're doing 150 knots. We are actually advised not to change our flight path because the birds act in unpredictable ways and violent maneuvers may actually increase the chance of a bird strike with birds dashing off precisely in the same direction you decided to turn towards. Also, it's easier to react to an engine failure if the plane's path is nice and stable rather than while you're violently banking or pitching.
Yeah, there's really no difference between an electrified car and one that was designed specifically as an electric car.
I'll make an airplane analogy:
- In 1961, researchers proposed that flying pigs, if they could be found, could be used to replace airplanes. With the rapid technological advances in actual airplanes, though, the research languished for decades
- In 1973, new research showed that, if flying pigs would exist, they could be herded in such a way that they airline operations would be made a lot more efficient.
- The research then languished again for many years, but recently more progress has been made. Methods have been proposed for actually finding flying pigs by systematically combing through rain forests. Also, more detailed descriptions of what flying pig farms could look like have been produced.
- While some still don't take this new field seriously, it does hold enormous promise for revolutionising the aviation industry. Flying pigs would reduce the carbon footprint of aviation to almost zero, so this idea becomes more and more attractive, even inevitable.
- It would only take a single scientific breakthrough to make this all possible: finding an actual flying pig. But given the growing amount of interest in this field, it should be only a matter of time.
My Samsung has a wireless charger and a standard phone jack.
You mean you can plug a landline into it? That's an odd feature for a cell phone...
Another possibility is they use it for spying on other satellites in orbit and don't want anyone else to know about it.
My point exactly...
But then why exactly is its orbit such a secret?
I love the way they describe the X-37B, as a platform for perfectly normal scientific experiments, nothing more, yet the trajectory is classified. Yeah, right.
Don't give him any ideas, he has nukes, you know.
What about battery electric ships?
I, for one, welcome our new robotic spaceplane overlords.
I'm not sure whether or not I understood your "solution", but if I did, I don't think it works quite as easily as you suggest.
What I think you proposed, was dividing the larger board into a grid of sub-grids, and then just filling them in recursively (so, for example, to get a 64x64 solution, start with an 8x8 solution, replace each empty square with an empty 8x8 grid inside of it, and each queen with an 8x8 solution). If that's your method, it doesn't work because the diagonals on the higher order board spill over into adjacent squares, therefore no longer guaranteeing a conflict-free setup. A queen on the 64x64 grid can conflict with another queen which, in the original 8x8 supergrid, is a knight's jump away.
Or maybe you were doing it differently?
Anyway, as you suggested, solving nxn is not really what they're looking for. The problem is completing an nxn board with a number of queens already fixed on the board.
Just wait until they introduce implantable RFID chips in some manner palatable to the common idiot.
Hey, if it gets me free games, sign me up!
Maybe you're holding down the space bar too long.
You're the one who's not a math guy, apparently.
100% of 0 is 0. Nothing wrong with that. Just because there are no more desktops doesn't mean that the term "desktop" has become undefined.
100% of all naturally flying pink elephants are capable of telepathy. That's a perfectly correct statement.
(With "naturally flying pink elephants", I mean excluding those painted pink and launched by catapult, obviously. Although those might somehow gain telepathic skills, you never know, it's worth a shot, but I digress)
Maybe we should train robots to teach our children more efficiently than today's teachers...
I, for one, welcome our new T-shirt sewing overlords.
Nope, that isn't even remotely in the right ball park. The number of people alive today is about 7% of the total number of people that have ever lived, according to some estimates.
In a near vacuum it's about the same as at higher pressure at the same temperature. Obviously it makes no sense in a total vacuum, but then just take the speed of sound outside the tube.
This was a bunch of students doing this for a project, and it reached that speed on a 1.7 km test track. With a longer track and more budget, they expect to go supersonic eventually. This is nowhere near a finished product, so don't compare it to one.
Why is everyone so pessimistic about everything Musk does? Even here on a supposed nerd site? Jeez, I know the guy uses a lot of hyperbole and has impossible ideas like, say, landing rockets on barges (o, wait, that actually worked) or making usable electric family cars that outperform two seat supercar monsters (o wait, he did that too). Maybe just see where this idea goes? We need more people like him, billionaires that are not afraid to push boundaries and try new things that may well fail but might just make a huge difference in the world, instead of just buying big yachts. I know he's crazy. That's what makes all the difference in this world of paralysing risk averseness.
So not only did they have tablets, but they had different and incompatible operating systems as well?
Wooosh...
That's just the currently selected layout for the built-in keyboard.
Well, for the Cirrus Vision SF50 it was considered an acceptable risk, apparently. And I imagine you'll still be able to glide in a safe direction before deploying the parachute. Also, this "Air Taxi" has so many separate engines, with probably lots of control redundancy built in as well, that it's unlikely that everything would fail together. The parachute would really be a very last ditch option.