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The Hyperloop: BUSTED
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David Hess:

--- Quote from: wraper on January 18, 2018, 06:48:39 am ---
--- Quote from: David Hess on January 18, 2018, 03:48:11 am ---
--- Quote from: james_s on January 17, 2018, 11:04:28 pm ---Without the mandates many people would have been content to keep using incandescent bulbs, oblivious to or not even comprehending the fact that the total cost of ownership including electricity is far more expensive for the "cheap" incandescent bulbs and the LED tech may not have caught on at all in an entirely free market.
--- End quote ---

The total cost of ownership of LED bulbs is much higher than incandescent bulbs where I am because either burn out in about 6 months due to our dirty power. At least the incandescent bulbs were cheap so replacing them was cheap.
--- End quote ---

I rather suspect you just buy very crappy bulbs. For decent bulbs quality of power won't matter too much.
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And I know that I did not; expensive bulbs hardly last any longer and not even longer proportional to the increase in cost.  There is nothing to be done about the power short of installing active power conditioning.

Even California concluded that the operating life of LED bulbs was grossly overestimated making their economic savings questionable but of course that did not give them pause in mandating their use.  The whole exercise was for rent seeking as I expected.
cdev:
"HYPELoop"

Whatever it's  purpose, it's NOT transportation~

It's likely a "shambolic" gesture as Simon puts it.
rrinker:

--- Quote from: David Hess on January 18, 2018, 03:48:11 am ---
--- Quote from: james_s on January 17, 2018, 11:04:28 pm ---Without the mandates many people would have been content to keep using incandescent bulbs, oblivious to or not even comprehending the fact that the total cost of ownership including electricity is far more expensive for the "cheap" incandescent bulbs and the LED tech may not have caught on at all in an entirely free market.
--- End quote ---

The total cost of ownership of LED bulbs is much higher than incandescent bulbs where I am because either burn out in about 6 months due to our dirty power.  At least the incandescent bulbs were cheap so replacing them was cheap.

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 Glad I don't live where you do, I replaced all the bulbs in my house with LEDs shortly after I moved in, almost 4 years ago now. Haven't had a single one fail. And they aren't the real expensive ones, almost all of them are just the Utilitech ones from Lowes. I even have one in the fully enclosed fixture over my kitchen sink and it seems some members of the household just can't be bothered to turn it off so it runs 24/7.
wraper:

--- Quote from: David Hess on January 18, 2018, 01:19:38 pm ---And I know that I did not; expensive bulbs hardly last any longer and not even longer proportional to the increase in cost.

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:palm: I hope you at least did not order them from China.
jonovid:

--- Quote from: EEVblog on January 17, 2018, 11:14:00 pm ---
--- Quote from: nctnico on January 17, 2018, 10:59:53 pm ---
--- Quote from: EEVblog on January 17, 2018, 07:13:00 am ---
--- Quote from: nctnico on January 16, 2018, 11:15:11 pm ---A first simple check is to see if a project is done by multiple companies (in parallel) or just one and where the funding is coming from.

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Another first simple step is to stop and think why no one has done this old idea before:

Has there been some radical breakthrough in maglev technology? No.
Has there been some radical breakthrough in ridiculously large scale vacuum tunnel technology suitable for human carriage over hundreds of km? No.
Has there been some other radical breakthrough in the transport market space? No.
Has there been some other breakthrough in cost reduction in anything to do with this? No.

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You can turn this reasoning around quite easely: if there is no demand for a radical breakthrough then it won't happen. Chicken & egg until someone throws serious money at the problem and makes the breakthrough happen. Creating something new often requires solving technical issues nobody has solved before.

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And sometimes, just sometimes, an idea will always just remain fundamentally impractical.

IIRC there is someone on this forum who is part of one of the top HL design teams who have published very details technical papers on it, and even they admit that the vacuum based HL idea is poorly thought through and basically may not happen.

And make no mistake, you can't separate the vacuum idea from Hyperloop, because without it it's no longer the Hyperloop idea.
A vacuum based passenger carrying intercity HL will never happen, I'll bet you a bitcoin on it.

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all is not lost  there is always the toy market.
Japan's Maglev Train - Linear Levitation Toys Train For Kids


the idea of a hyperloop toy is a tube kit that makes sounds, as the idea kids imagine the train inside the tube.  :-DD
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