What is Digg?162 Comments
- inactive, on 10/12/2007, -0/+7@NCMedic:
what are you talking about? gravitational forces only apply during acceleration or deceleration... once it's moving, there are no G forces acting linearly... also note that it took over a minute to get up to 500km/h, so your comment about gravitaional force is completely nonsensical... - Svenson, on 10/12/2007, -0/+6312 doesn't seem that fast??? OK you are officially an idiot....or superman, I suppose you think going 200 in a race car is slow too. Go play ever quest because you're completely out of touch with reality.
- Urusai, on 10/12/2007, -0/+3Not quite ludicrous speed...
- br0ken1128, on 10/12/2007, -0/+3@dude3609
Yeah man, I've never seen this video either, see I have a job and it keeps me busy so in the day time I'm working and can't really spend my time surfing every resource on the net, so I'm not always on top of things like you are.
Digg is great for me because I find new things ;)
I'm also not on digg so damn much that I spot dupes like a lot of people.. a great idea would be to stop refreshing the main page 100 times a day ;) - kuzkos, on 10/12/2007, -0/+3"502 km/h
what is that? 15 mph?"
err no, 312mph. That would have been funnier if the speed wasn't in the title o_O - sitzmar, on 10/12/2007, -0/+2The best part is the FF style end of battle music when they arrive at their destination.
- CLIFFosakaJAPAN, on 10/12/2007, -0/+2@NCmedic....."makes me think its totally rigged and faked"
Are you kidding me? This is totally real and was even showcased at the 2005 World Expo in Aichi, Japan. You gotta have more faith in the human ability to create these Hight Tech Wonders. - sdbryan, on 10/12/2007, -0/+1superfarstucker,
You might want to keep going a step or so further in your calculations. There is nothing much wrong with your starting point (though I think the mean distance from the earth to the sun is a little more than 90,000,000 miles). But finish the calculation. The implied acceleration from moving at 60,000 mph around a circle with radius 90,000,000 miles is only 0.0016 ft/sec^2. That is four orders of magnitude less than acceleration due to gravity at the surface of the earth. It shouldn't be any wonder that we don't have an intuitive feel for it like we have for gravity.
Also at the equator the centripetal acceleration implied by the rotation of the earth on its axis is on the order of 0.1 ft/Sec^2. Again it is dwarfed by the acceleration due to gravity. There are a lot of large numbers lurking in the calculations but they occur in both the numerator and denominator so you really need to pull out a pencil and paper (and/or calculator) if you want a meaningful result. - SpaceDreamer, on 10/12/2007, -0/+1" French TGV did 515.3 Kmh in 1990 "
... and has been running at less than 320km/h ever since. - CLIFFosakaJAPAN, on 10/12/2007, -0/+1Nice 1280 x 960 Photo:
This MLX01-1 was displayed at the Aichi World Expo in Japan (Summer 2005)
http://upload.wikimedia.org/wikipedia/commons/4/48/Linear_Motor_Car_MLX01-1.jpg - SuperFarStucker, on 10/12/2007, -0/+1Even more, think about how fast our planet is rotating. It is approximately 25,000 miles in circumference and completes one rotation every ~24 hours. We're moving (near the equator) at ~1000 miles per hour, yet we feel nothing? How can airplanes move anywhere since the ground is moving so fast? These are all the sort of naive things that just don't make since unless you have a rudimentary understanding of mechanics.
- Nighthawke, on 10/12/2007, -0/+1When was the last time you got to go over 300 MPH at near ground level?
gimmi gimmi gimmi! ^.^ - datagod, on 10/12/2007, -0/+1Thats pretty fast. Too bad the video isn't as short as the train ride...WAY too much camera jiggling.
- SniperX, on 10/12/2007, -1/+2lol, "japan of club"
- inactive, on 10/12/2007, -0/+1When does america get this? Wish I could just hop on and go anywhere.
- SpaceDreamer, on 10/12/2007, -0/+1"the gravitational forces" ... yeah right... you don't even understand the words you are using...
- absurdist, on 10/12/2007, -1/+2@NCMedic:
Don't fly in a lot of commercial aircraft, do you? - WizardMaster, on 10/12/2007, -0/+1I saw the video of Maglev Train went high speed 500kph. It's wonderful faster than TGV. Oh...wait minutes, I calculator between TGV and Maglev from start to top speed at timer & distance.
TGV (France) 0-300km/h in 2m 12s at 6km
0-500km/h in 22m at 166.7km
Maglev (Japan) 0-300km/h in 39s at 1.92km
0-500km/h in 2m 01s at 6.86km (Super quick than TGV)
Price for built the rail
Maglev's rail are very expensive tags price. (Example 10m length cost US$1.3m without bridge cost)
TGV are is low price and easy fit the rail plus Power line cable with two single pole (Example 10m length cost US$38,000 without bridge cost.
When earthquake can damage the rail or bridge. Who repair the rail taken long a delays.
Maglev - Stop ride until done repair in less 4 months process. And more cost repair about US$100m.
TGV - Less 7 days complete to ready ride. Less US$10m repair cost.
I like that Maglev design is advance speed. But I hard tell you that Maglev are too cost than TGV is cheap. Anyway... - Orangutan, on 10/12/2007, -0/+1are you telling me the cameraman couldn't have gotten a windowseat?
- djhifisi, on 10/12/2007, -0/+1@Bromslkoss. Nice one. I bet the cow would hardly even notice.
As to the question of efficiency - well that's pretty much down to frontal area of the train, (hence the very long sloping nose), the effect of wind resistance is MUCH greater than rolling resistance of steel wheels on a steel track (+friction of wheel bearings etc but these pretty minimal too compared with wind resistance) so don't think Maglev would make huge gains in efficiency over a train rolling on wheels. Wind resitance increases with velocity to the power of 4 I seem to remember (anyone bother to look up Bernoulli?) so yes it will take a lot of energy to keep it pushing through the air at 500km/hr.
Also - It levitates by an electromagnet, so is fail-safe, if the power goes off it comes to a halt pretty quickly. It has sensors on it to keep distance between train and rail just right, I'm sure these would trip in even of an earthquake which would also stop the train safely.
Yep, I reckon cow (or person..) is the real thing to watch out for... - SilentSpyder, on 10/12/2007, -0/+1we need one.
- SuperFarStucker, on 10/12/2007, -0/+1The people who are incredulous about the speed it travels and the g's you must be 'subjected too' from it moving so fast, I have a thought experiment for you. Nearly everyone has heard it takes nearly 8 minutes for light to reach the earth, making our orbit radius approximately 8 minutes * speed of light ~ 180,000 miles per second ~ 85 million miles. It is trivial to compute the distance our planet travels in a year with this information, and you may be surprised to learn it is quite fast, yet us mere mortals on earth feel nothing, why is that? 85,000,000 * 2 * Pi yields roughly ~ 500,000,000 or half a billion miles / 365 / 24 = 61,000 mph. In fact, we are even undergoing an acceleration, otherwise our planet would be travelling in a straight path, so clearly, we should feel it... right?
- Soave, on 10/12/2007, -0/+1"the gravitaional forces at those speeds would make holding a camera near impossible. But thats just my opinion."
Didn't bother to see if anyone else already mentioned it, but g-forces only apply when it's accelerating. You could be moving at 1,000 MPH but as long as your staying at that speed, you wouldn't feel increased g-forces. In fact, if it were a totally smooth track, you wouldn't even know you were moving unless you looked outside. - loser11911, on 10/12/2007, -0/+1".the gravitational forces at those speeds would make holding a camera near impossible."
There are no gravitational forces on the occupants inside, they're traveling the same speed as the train. That is why it takes soo long to reach it's maximum speed, that is what lets it be suitable for passengers to ride. Very gradual acceleration. - inactive, on 10/12/2007, -0/+1["the gravitaional forces at those speeds would make holding a camera near impossible. But thats just my opinion."]
Wow someone failed physics class. - foshizol, on 10/12/2007, -0/+1You know what really pisses me off is that supposedly I live in the "greatest country in the world". And we don't even have this *****. Where I leave they've been talking about building a high speed train from L.A. to Las Vegas for 20 years now, and it's still hasn't hap pend.
- FlyboyP, on 10/12/2007, -0/+1It's cool as crap but it makes me wonder about construction expense (multiple tunnels thru mountains, bridges over every road intersection), maintenance costs, energy efficiency, and hazard avoidance (birds, cows, rocks on the track). All these things together make it technically and politically impractical, at least in most places in the US.
I'd still like to ride it though. - darkness, on 10/12/2007, -0/+1This is kinda old news, interesting none the less. I researched the tech a little for my physics class a little over a year ago. dugg just for being an alternative to cars and the related traffic.
To answer a few questions: The train goes slower through stations and around turns (to minimize the Gs and safety issues). 500 km/h is fast, especially for ground speed (duh). The train uses superconducting magnets (freezer cooled high temperature ones unless they're still on liquid helium/nitrogen) to minimize the power used for the magnets as well as track switching which turns off sections of track not in use. I've never seen any designs in use where the track is vacuum sealed. I think the cost of resisting the air might be cheaper than the construction, maintenance, and hazards of doing it, but I'm just guessing.
If you're really interested:
http://jr-central.co.jp/eng.nsf/english/n-05-0701
http://www.rtri.or.jp/index.html
And a European company site with a different design (in case you missed it in the earlier post):
http://www.transrapid.com/ - Werdock, on 10/12/2007, -0/+0Oh, come on! The track is not made of magnets, obviously. Imagine, how much would it cost to build a track out of that strong magnets?! Also the birds flying south would be all freaked out with their biological compasses.
- rtfx, on 10/12/2007, -0/+0I remember there was talk some years back about doing a San Fran LA route with a high-speed train. What ever happened to that?
- mc1123, on 10/12/2007, -0/+0think what would happen if a cow got in front of THAT.
- Sundroid, on 10/12/2007, -0/+0Some awesome pictures of Japanese bullet trains:
http://en.wikipedia.org/wiki/Image:Twinshin.JPG
http://en.wikipedia.org/wiki/Image:Shinkansen_500_Kyoto_2005-03-19.jpg
http://en.wikipedia.org/wiki/Image:Fastech_360S.jpg
The "orange ears" on top of the train are "air-braking" plates. - stratoskater, on 10/12/2007, -0/+0this is not a bullet train, this operates on magnetism, which the whole track is made out of magnets.
If you have every tried to push two opposite ends of a magnet together, they have an invisible boundary. The Maglev Train actually levitates a few inches off the ground.
i heard they were sometime gonna make a track going from los angelas to las vegas....just a rumor
+digg! sweet! - Midnightbrewer, on 10/12/2007, -0/+0"You can see the people on the train just don't care about how fast they're going. One guy look like he's falling asleep. Absolutely amazing."
Well, the shinkansen has already spoiled people for one, and for two, the Japanese look for any legitimate excuse to take a nap (most people don't sleep enough as it is.) EVERYBODY in Japan sleeps on the train; it's practically conditioned. I've been living here for four years and it's happened to me, too. - Bromskloss, on 10/12/2007, -0/+0mc1123 writes: "think what would happen if a cow got in front of THAT."
With a sufficiently long head and tail (of the train), perhaps the cow cow would just rise gently as the train moves in beneath it and settle down when the train has passed. - mindsinker, on 10/12/2007, -0/+0I thought it was going to look faster when it passed by...
- inactive, on 10/12/2007, -0/+0@honkaform
I'm all for the awesomer stuff - Bromskloss, on 10/12/2007, -0/+0silentspyder writes: "we need one."
Was that a note, accidentally posted on digg, to your assistant, with whom you are trying to take over the world? - Bromskloss, on 10/12/2007, -0/+0Werdock writes: "Oh, come on! The track is not made of magnets, obviously. Imagine, how much would it cost to build a track out of that strong magnets?! Also the birds flying south would be all freaked out with their biological compasses."
Really? In that case, it would be _very_ interesting to hear how you would describe it's function. - curtissthompson, on 10/12/2007, -0/+0I remember before this train became a concept I was talking with one of my teachers about this idea, to use high powered electromagnets to provide, amazing speed, and low energy consumption for high speed rails, just merely rotating them based on need for acceleration, deceleration, or a constant speed! Then a couple years later they began work on the idea of such a train, it is nice to see the idea become realized and implemented, though they have been around for a while!
- Mushroonaut, on 07/11/2008, -0/+0sweeeeet!
++digg - JimDinger, on 10/12/2007, -0/+0Wow that thing moves!!
- xelloss, on 10/12/2007, -0/+0If they would freaking Build one, I would rather take the train then fly.
- Bromskloss, on 10/12/2007, -0/+0There are already several other constructions which enable speeds almost equal to the speed of light. Oh, and those are only for really small people... kind of the size (and charge) of an electron. ;-)
- RobSaint, on 10/12/2007, -0/+0no excuses for being late for work in Japan then!
- daduke, on 10/12/2007, -0/+0II read another post earlier telling that there was a plan to allow Internet access in those maglev.
I often use the Thalys (between Paris and Brussels) and it is fast, and some of the already have wifi access.
The TGV never attempted a lot of records, because since 1990, there has been a lot of improvements to this train (more powerful engines, better aerodynamic...), but since TGV is really mainstream, as soon as a high speed railroad is finished, it is used for commercial purposes, no more benchmarks.
Too bad... - JimmyDushku, on 10/12/2007, -0/+0that bridge looks a lot like the 360 bridge in Austin, Texas. same design + color.
- HvitRavn, on 10/12/2007, -0/+0Pretty amazing, but what happens if a bird hits the train? Except making a big red stain.
- HaroldHupmobile, on 10/12/2007, -0/+0You can see the people on the train just don't care about how fast they're going. One guy look like he's falling asleep. Absolutely amazing.
- blues911, on 10/12/2007, -0/+0just amazing!!!
I think the US is years away from getting anything like this....thats too bad....but its damn cool.... -
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