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Hyperloop news.

CAPSLOCKSTUCK

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The 14-foot-long (4.3-metre) vehicle was shown to hover around a quarter of an inch (0.6cm) above the ground, powered by eight miniature engines.

'Our pod is light-weight, modular and scalable and can travel up to 240mph,' said Dhaval Shiyani, Founder, Team Captain and Chief engineer at Hyperloop UC
http://hyperloopuc.com/





'It features a dual redundant braking system with magnetic and friction brakes along with a dual redundant levitation system through magnetic levitation and wheels'.

'The levitation system works through strong magnetic arrays arranged in a circular pattern which, when rotated at high speeds, produce a lift force capable of levitating our entire 300kg system'.

Tesla and SpaceX boss Elon Musk first unveiled his Hyperloop concept in 2012 and subsequently challenged the world to submit prototype ideas for the tube-based passenger system that would allow travel between cities at the speed of sound.

The selected prototypes will be tested between 27 and 29 January on a mile-long test track next to SpaceX's HQ in Hawthorne, California.


A render showing what the finalised Hyperloop UC pod will look like.




http://www.spacex.com/hyperloop
http://www.universityherald.com/art...innati-students-works-magnetic-levitation.htm
 
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So how is this different from MagLev trains?
 

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The biggest issues facing this are the braking, having a vacuum tube of the size required. If they pull/push it with air instead of in a pure or almost absolute vacuum (why do planes fly at high altitude, because there is less air and lower friction) they can eliminate half the work in engineering it.
 
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Just hope the tunnel won't have catastrophic decompression failure. Coz that would be highly painful...
Which is why a better solution is a push pull setup every so often in the tunnel, and if you have a catastrophic failure of the tube in the vacuum section it will suck debris away from the train/module, and if in the pressure section it will push the train away from the damage and blow the debris out, and a loss of either will slow the train/capsule and a loss of both will stop it, perhaps with the exception of a small drive that will allow it to travel to the next port at a very reduced speed.
 

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Im sure i read somewhere that you dont necessarily have to produce a vacuum, you need to replace the air with a less resistant gas. You dont need to create zero friction just reduced friction.

I'm not convinced by the video.
 
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You're not convinced by a video? Have you stopped watching it after 10 seconds to miss the largest vacuum chamber in the world, made of thick reinforced concrete to be able to withstand the atmospheric pressure from the outside and the crushing forces of the vacuum from inside? But they'll make a system several hundred times larger out of a thick metal. Which brings us to the metal expansion part. Ever wondered why trains make a repeated "ticking" noise while driving on railroad tracks? Yeah, that "ticking" noise are gaps in railroad tracks to compensate for metal expansion due to environment temperature. Without it, tracks would bend, causing train to derail. Don't you understand, the larger the object is, the larger expansion will be. They could solve this easily at the atmospheric pressure. They've done that for bridges and railroads for centuries basically. Not so much when you need to maintain a different pressure inside and you can't afford ANY gaps in the system. And even if they do, every single such point would be an extra potential failure point. Not exactly desired...

And the "less resistant gas" just means the density of the gas in the Hyperloop tube. You don't want to fill it with least dense gas, the hydrogen. Hindenburg and all that. Besides, for as long as you have anything in the tube, you'll be facing the same problem. The faster you go, the more resistance it'll create. Especially at planned above supersonic speeds (passenger planes fly at around 900km/h or ~550mph, a lot slower so they don't really create that effect at given altitudes). Not to mention, in a closed system, you'll create a vacuum behind you, causing additional drag from behind. So, essentially you are FORCED to go with vacuum. And then you experience with problems listed above. Airplanes don't have those problems because the atmosphere is not a closed system (it is planet wise, but it doesn't matter for an individual airplane). They just need to fly high enough to be within a thinner part of atmosphere to DECREASE resistance and drag. You still can't eliminate it entirely, but you improve efficiency.

The core idea is good, if you eliminate resistance and drag, you enhance efficiency significantly. The problem is, it's just not practical on any level.
 

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I did watch the video actually and this is my point. I dont think you need such a vast construction because you dont need a complete or near complete vacuum or anything like it.

This has nothing to do with Elon Musks idea. He set up the competition it is entered in and the team were inspired by his vision.....that doesnt mean their ideas and innovations will be the same as his.

Spacex and Musk have both said that they are not affilaiated to any Hyperloop companies.
 
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I did watch the video actually and this is my point. I dont think you need such a vast construction because you dont need a complete or near complete vacuum or anything like it.

This has nothing to do with Elon Musks idea. He set up the competition it is entered in and the team were inspired by his vision.....that doesnt mean their ideas and innovations will be the same as his.

Spacex and Musk have both said that they are not affilaiated to any Hyperloop companies.


Well, to quote Trump...... WRONG lol

They need to fly that high to get away from the thick atmosphere, and the design is only constrained by the lack of oxidizer, for example at 37,000 feet where there is http://www.engineeringtoolbox.com/standard-atmosphere-d_604.html roughly 10PSI less pressure and 2.5 times less density. To push something like a bullet through air at high velocity causes it to heat up, and all that loss is bad for efficiency, so its easier to remove some or all of the resistance.
 

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Well, to quote Trump...... WRONG lol

They need to fly that high to get away from the thick atmosphere, and the design is only constrained by the lack of oxidizer, for example at 37,000 feet where there is http://www.engineeringtoolbox.com/standard-atmosphere-d_604.html roughly 10PSI less pressure and 2.5 times less density. To push something like a bullet through air at high velocity causes it to heat up, and all that loss is bad for efficiency, so its easier to remove some or all of the resistance.



i think you are reading it wrong....this thread is about a device that travels at 240mph.....not Elon Musks pipe dream from 2013..

We will all learn more when they start the competition.
 
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Nobody's mentioning the fact they all look like clones?
 

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Los Angeles-based start-up Hyperloop One has started construction on a development that could potentially become the world's first Hyperloop transport system.

The first tube of 'DevLoop', which looks set to become the first full Hyperloop system, has been successfully installed in a desert in North Las Vegas. The 1.8 mile (3 km) full-scale and full speed enclosed prototype is taking shape in the desert. Hyperloop One has raised a total of $160 million (£128 million) to date

















 

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30 teams selected through SpaceX’s competition are developing working prototypes that will be put to the test in January.

Among the chosen few is Australian team VicHyper, which has unveiled a design focusing on braking and acceleration that could one day be used in a levitating system.




The team from RMIT University in Melbourne won the Braking Subsystem Technical Excellence Award earlier this year, New Atlas reports.

For the upcoming tests set to take place from January 27 to 29, though, they will be simplifying their futuristic design at the request of SpaceX, as the competition will have both levitating and non-levitating classes.

The prototype will be put on wheels, with the air bearing removed, Project Leader Zac McClelland told New Atlas, allowing them to perfect the system for high speeds and in a vacuum.

The VicHyper pod uses a linear induction motor, which has never been used in a vacuum before, for acceleration and deceleration.

It also has a second braking system for emergency stops, which relies on eddy current brakes.

These are often used in high-speed trains and even roller coasters.

While other teams are using permanent magnets for such systems, VicHyper is using an onboard battery to power electromagnets

Using a spinning metallic disk rigged with electromagnetic coils sitting roughly .4 inches off of it, the team revealed it makes for quick, reliable stopping.

We can spin that up to about 500 rpm, and then turn those coils on – it stops in about half a revolution (two seconds),’ McClelland told New Atlas.
 

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Hyperloop Transportation Technologies (HTT) has revealed they’ve now begun construction on the first passenger capsule – and it could be available early next year.

According to the firm, their pods will be able to carry a total of 164,000 passengers every day, departing every 40 seconds.

HTT and Spanish firm Carbures have started work on the radical pod that they say will be the first passenger capsule in the world.

The Hyperloop pod, which will be tested at the company's Toulouse headquarters, will harness passive magnetic levitation and a low pressure tube to hit unprecedented speeds.

‘The capsule hovers inside a tube with low air pressure, and like a jet plane at high altitude, experiences little air resistance,’ according to the firm.

‘The remaining air in front of the capsule is moved to the back using a compressor, allowing for speeds up to 760 mph, with very low energy consumption.’

Each pod will be about 100 feet long, and 2.7 meters wide.



 

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The firm announced it has completed the installation of its 1,640-foot-long DevLoop test track in the desert just outside of Las Vegas.

Hyperloop One says it is now the ‘only company in the world’ building an operational commercial system of this kind, and plans to have 500 employees by the end of the year




The now-completed DevLoop track will serve as an outdoor lab, where the firm will test levitation, propulsion, vacuum, and control technologies The Hyperloop pod, which will be tested at the company's Toulouse headquarters, will harness passive magnetic levitation and a low pressure tube to hit unprecedented speeds.


‘The capsule hovers inside a tube with low air pressure, and like a jet plane at high altitude, experiences little air resistance,’ according to the firm.

‘The remaining air in front of the capsule is moved to the back using a compressor, allowing for speeds up to 760 mph, with very low energy consumption.’

Each pod will be about 100 feet long, and 2.7 meters wide.

According to HTT, the world’s first capsule will be ready in early 2018.



hyperloop.PNG
 
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They needed half a day to decompress like a kilometer of this tube. And they plan on building 1152 miles long hyperloops. Just the time to decompress these things would be longer than going the distance with a bicycle and still arriving earlier...
 

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I have one huge concern about this system: if it is intended to move people, how are they providing fresh air? Commercial aircraft simply used compressed air from the environment around the aircraft because it's not a closed system but this is. If they aren't constantly exchanging the air in the tube, it will eventually become toxic.

I hope the program ultimately succeeds because cities like LA need mass transit the citizens will accept and use. Hyperloops have the potential to be a lot like a car in terms of getting around but also a crapload faster.
 
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The whole idea is a fail. It would be cheaper and faster to build a super fast train like used in Japan. It's cheaper to begin with, proven to work, no decompression hazard, no air toxicity hazard, no ridiculously long waiting to even board and start the trip etc.
 
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I have one huge concern about this system: if it is intended to move people, how are they providing fresh air? Commercial aircraft simply used compressed air from the environment around the aircraft because it's not a closed system but this is. If they aren't constantly exchanging the air in the tube, it will eventually become toxic.

I hope the program ultimately succeeds because cities like LA need mass transit the citizens will accept and use. Hyperloops have the potential to be a lot like a car in terms of getting around but also a crapload faster.
I wonder what happens with an explosive decompression inside the loop itself, anyone remember Total Recall :eek:
 

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If an explosive were to go off in it and nothing were in the direct line of fire of it, it actually wouldn't be bad unless one were to make contact with the hole (think high speed derailment). These things are moving faster than the speed of sound so the pressure wave wouldn't catch up to those already past the breach. Those that are heading towards the breach will be slowed by the increase in air pressure helping to slow them from hitting the breach. Overall, I think they're as safe as subways if not safer.

The whole idea is a fail. It would be cheaper and faster to build a super fast train like used in Japan. It's cheaper to begin with, proven to work, no decompression hazard, no air toxicity hazard, no ridiculously long waiting to even board and start the trip etc.
Actually, not really. High speed rails mean long distance with few stops, the rail must be isolated from other traffic (elevated, underground, or fenced off on ground; including animals), and wind resistance will prevent any land based solution from reaching the speed of a vehicle in a partial vacuum.
 
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