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Hyperloop

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661–670 of 983 posts

Re: Hyperloop

#661
Why not go ahead and build the Hyperloop, and when CA HSR gets around to actually building the links into downtown LA and SF, design them to connect up to the Hyperloop, which will surely be complete and running by the time HSR is projected to be available. The Hyperloop can even share some rights of way with HSR. Why not have both?

Hyperloop should be an AND proposition to HSR, not an either/or.

Re: Hyperloop

#662
post #32

"In the case of the Hyperloop, Musk started focusing on public transportation after he grew disenchanted with the plans for California’s high-speed rail system." And who says that big government stifles entrepreneurial innovation? If ALL Musk does with the Hyperloop announcement is shed more light on the potential debacle that is to be our $70b+ high-speed rail in California, we owe him a debt of gratitude. PS - Dire…

If ALL Musk does with the Hyperloop announcement is shed more light on the potential debacle that is to be our $70b+ high-speed rail in California, we owe him a debt of gratitude. Really? Because it looks like this is an attempt to derail CA HSR using a proposal for an experimental technology that offers a fraction of what CA HSR does, but is potentially faster. CA HSR replaces/upgrades two metropolitan rail systems…

It is presented to provoke and I think you're right, it does look like an attempt to derail CA HSR.

Instead, I think of it this way... if it's so cheaply do-able, then - do it! Sounds like an easy money making idea if you can build it for the figures proposed. While you may only need to charge $20 each way to break even, why not charge double what it costs to go the next most fast, convenient way, and you would make bank! I mean, who wouldn't do this if it works as envisioned? It's a genius business plan, right!?

So do it! Some rich bold genius! Build us a hyperloop - so cheap and obvious and do-able! And whenever we get to HSR, we'll build it so it connects to the awesome LA-SF express hyperloop.

Re: Hyperloop

#663
I have an anecdote here that is both funny and sad. My friend's mom visited a few years ago from Germany.

After she returned home she said that she really had enjoyed the trip, especially the trip on "the old, historical train".

She was talking about Amtrak.

Re: Hyperloop

#664

How about some physics about this? Here is some... http://dmitry.gr/index.php?r=06.%20Thoughts&proj=01.%20Hyper...

I think it mentioned in the PDF that speeds would be reduced significantly while in or near residential areas?

Re: Hyperloop

#665

This is very serious first proposal. As a professional mechanical engineer I have worked on high quality steel tubes (nuclear submarines) before. The immediate thing that sticks out to me in this proposal are the tight mechanical tolerances that have to be maintained. Talking about tens of thousandths of an inch tolerances on a 10' diameter tube is not to be dismissed lightly. That is going to be tough to maintain -…

As a professional engineer I think you're missing the point that the air bearing doesn't require such tolerance it creates such tolerance automatically through negative feedback of the physical system. (yes, I know I'm hell banned)

Re: Hyperloop

#666
post #585

Earlier quoted context omitted.

>executives who weren't union members, it has nothing to do with unions. http://www.paloaltoonline.com/news/show_story.php?id=24566

Link describes one-time payouts upon retirement, not recurring pensions. "Denson also earned $407,908 in total wages in 2011, according to city data, making him the highest paid city worker in 2011. Of this sum, $212,738 consisted of "cash out" pay, which accounts for such factors as vacations, holidays and unused sick pay. His regular salary was $195,169."

it describes his last salary, so if you know the formula, 3% at 55, and his years of service - 31 - stated in the article, it also allows to calculate his pension - 180K+

Re: Hyperloop

#667
post #238

Earlier quoted context omitted.

Can you elevate rail as easily? We're talking a lot more weight being carried by the pillars in that case. Plus you don't get the same natural banking off the walls he talks about, which is relevant at these speeds. While rail could bank, you better be going at the right speed when doing so, too slow and you just fall laterally off the tracks.

Can you elevate rail as easily? The short answer is, "yes." I've ridden on it. The slightly longer answer (as another commenter has pointed out) is that it depends on the weight of the train versus the weight of the hyperloop. I see no fundamental reason to assume that the hyperloop is lighter than the train. It could be so, but then, we could make smaller and lighter trains, too (light rail). Plus you don't get the…

The hyperloop passenger capsule is estimated at 15,000 kg, while a TGV weighs 400,000 kg.

[1] https://en.wikipedia.org/wiki/TGV

Edit: I had the wrong numbers before, thanks to Shiffern for the correction.

Re: Hyperloop

#668
post #386

Earlier quoted context omitted.

Not alongside. On top of. And all of it needs to be approved for safety in earthquakes. If you're traveling at 600 mph, you do not want to have that tunnel unexpectedly move even a foot sideways during an earthquake.

Not to be nitpicky but if you haven't driven the I-5 theres substantial room between each direction of the freeway so I don't think it will actually be above traffic if that's your concern.

There are overpasses all along I-5. I seriously doubt you can put a 20 ft elevated tube under them and you certainly don't want them in a place where a truck can easily slam into the support pillars.

Re: Hyperloop

#669
post #651

Earlier quoted context omitted.

>He's also traditionally been an opponent of government waste. he is in bed with gov employees unions (the unions are primary driving force behind 200-300K/year gov employees pensions ( http://www.mercurynews.com/salaries/pensions ) with retirement age of 55, CA is something like $200B deep in that hole), and especially with prison guard union - of course huge prison population resulting from "toughness on crime" may…

"especially with prison guard union - of course huge prison population resulting from "toughness on crime" may not be viewed as government waste by some" - what if the prison guard union got in on the contract to have the prisoners build the hyperloop?

it seems you can do very well if you get into CA politics :)

Re: Hyperloop

#670
post #585

Earlier quoted context omitted.

Link describes one-time payouts upon retirement, not recurring pensions. "Denson also earned $407,908 in total wages in 2011, according to city data, making him the highest paid city worker in 2011. Of this sum, $212,738 consisted of "cash out" pay, which accounts for such factors as vacations, holidays and unused sick pay. His regular salary was $195,169."

it describes his last salary, so if you know the formula, 3% at 55, and his years of service - 31 - stated in the article, it also allows to calculate his pension - 180K+

So what you're saying is that their pensions aren't "200-300K/year"?
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