131–140 of 279 posts
Earlier quoted context omitted.
Elon Musk is the Tesla and Steve Jobs of our generation.
Oh the confusion. Perhaps 'Nikola Tesla' would have been better.
He's not very popular on the internet for a variety of reasons, but I think that Edison is a better comparison. Not the first person I'd compare him to, but I'd sooner compare him to Edison than Tesla.
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"Premature idea" is probably better phrased as "not feasible on technical grounds." Even tlb said it has huge problems. The steel expands in summer due to heat. Where does it go? Roads can expand using those interlocking teeth things, but hyperloop has to remain a closed system. Oh well. Everyone should dream once in awhile. EDIT: So... is this incorrect?
How about hedging your statement to "not CURRENTLY feasible using TODAY'S materials and structural concepts (trusses, etc)". Space flight and industrial production of fertilizer were both considered impossibilities when first proposed.
If you're planning on building a closed loop out of steel, and there's nowhere for the steel to go when it expands in summer, the plan may need some rethinking.
The best I can think of is some kind of inner lining, so that it has a segmented hull, like a caterpillar: https://www.google.com/search?q=caterpillar&tbm=isch
But it would need to be very strong lining in order to prevent any leaks between the segments. And any kind of a leak would need to be detectable and would shut down the hyperloop until it's resolved.
Between the wildly optimistic cost projections and the fundamental engineering difficulties, I'm much more inclined to call it a pipe dream than a perhaps-future-possibility.
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Well, Elon Musk said talking about hyperloop was like shooting his own foot. It was a premature idea. But the interesting part is some(more than some) people are actually trying trying to come up with a real world implementations of hyperloop and so far their verdict is 'it's doable' and they are working on it. And these people are engineers from reputed companies around the world. I don't particularly like the conce…
"Premature idea" is probably better phrased as "not feasible on technical grounds." Even tlb said it has huge problems. The steel expands in summer due to heat. Where does it go? Roads can expand using those interlocking teeth things, but hyperloop has to remain a closed system. Oh well. Everyone should dream once in awhile. EDIT: So... is this incorrect?
Feel free to disagree with whether or not the approach outlined is feasible, but this is specifically covered in the whitepaper. See page 5, section "Earthquakes and expansion joints" as well as page 28, section 4.2.3 "Pylons and tunnels".
Earlier quoted context omitted.
Well, Elon Musk said talking about hyperloop was like shooting his own foot. It was a premature idea. But the interesting part is some(more than some) people are actually trying trying to come up with a real world implementations of hyperloop and so far their verdict is 'it's doable' and they are working on it. And these people are engineers from reputed companies around the world. I don't particularly like the conce…
"Premature idea" is probably better phrased as "not feasible on technical grounds." Even tlb said it has huge problems. The steel expands in summer due to heat. Where does it go? Roads can expand using those interlocking teeth things, but hyperloop has to remain a closed system. Oh well. Everyone should dream once in awhile. EDIT: So... is this incorrect?
Earlier quoted context omitted.
How about hedging your statement to "not CURRENTLY feasible using TODAY'S materials and structural concepts (trusses, etc)". Space flight and industrial production of fertilizer were both considered impossibilities when first proposed.
Sure, I'll reduce it to "Unless people make an advancement in structural materials similar to the invention of steel itself, which is to say 'fundamentally world-changing,' hyperloop is nothing more than an inspirational pipe dream, similar to world peace." (EDIT: This comment may actually get called out in the future once Hyperloop is fully deployed, as an example of some idiot's words. So it's probably more than a…
> But it would need to be very strong lining in order to prevent any leaks between the segments.
The entire point of not requiring vacuum is to avoid having nearly as strict tolerances for leaks.
Earlier quoted context omitted.
"Premature idea" is probably better phrased as "not feasible on technical grounds." Even tlb said it has huge problems. The steel expands in summer due to heat. Where does it go? Roads can expand using those interlocking teeth things, but hyperloop has to remain a closed system. Oh well. Everyone should dream once in awhile. EDIT: So... is this incorrect?
> The steel expands in summer due to heat. Where does it go? Roads can expand using those interlocking teeth things, but hyperloop has to remain a closed system. Feel free to disagree with whether or not the approach outlined is feasible, but this is specifically covered in the whitepaper. See page 5, section "Earthquakes and expansion joints" as well as page 28, section 4.2.3 "Pylons and tunnels".
He doesn't properly address thermal expansion of the entire system. A long straight steel tube from SF to LA will expand a total of 300 meters over a 40C temperature change. Where does it go?
Earlier quoted context omitted.
Sure, I'll reduce it to "Unless people make an advancement in structural materials similar to the invention of steel itself, which is to say 'fundamentally world-changing,' hyperloop is nothing more than an inspirational pipe dream, similar to world peace." (EDIT: This comment may actually get called out in the future once Hyperloop is fully deployed, as an example of some idiot's words. So it's probably more than a…
See my comment above - the expansion is specifically addressed. If you're going to criticize it, at least read the full whitepaper first. > But it would need to be very strong lining in order to prevent any leaks between the segments. The entire point of not requiring vacuum is to avoid having nearly as strict tolerances for leaks.
Regardless, the core structural engineering is the focus of the criticism, not whether it might leak. Also, since Space X's whole point is to compete on cost savings, it was a little strange to hear cost projections that were so optimistic.
On this video the trajectory seems a bit weird. It looks like the rocket does its approach slightly to the right and afar, and then when it gets closer it changes direction and goes towards the camera, more or less in the direction of its tilt. As if the rocket began to tilt only around the end to a point the engine could not compensate anymore except by adding a large horizontal acceleration.
Sorry for sounding like such a fanboy, but during my 40 years on this earth, I have never been more impressed with a human being. The guy is pushing the envelope on perhaps the most difficult engineering/technological endeavor ever attempted by a private company - and he's making it look cool and futuristic. As if that wasn't enough, he's doing this in two different industries simultaneously. I'm not saying he can do…
> I'm not saying he can do no wrong, but I'm just flabbergasted that there are still so many armchair critics and naysayers when it comes to Elon Musk. That's why you're a fanboy. Nobody is perfect, and Elon Musk likes to make fun of the competition quite publicly when they have an issue, while ignoring his project's own failures. It is hard to even discuss the man on HN as anything that could even be taken as critic…
https://twitter.com/elonmusk/status/527247155954610176
And his comment on their rocket being the butt of a joke, using engines literally made in the 1960s and stored in Siberia were true. It is upsetting, but still not as surprising that they suffered catastrophic failure having such an adversion to new tech.