dojomouse

12 ms·

61.
by dojomouse 13y ago
You're assuming that the remaining $4trillion is lost. It's not. It goes to other people who will spend it on other things worth, in total, $4tril... even though some of them may need it less. The benefit they derive from the incr
62.
by dojomouse 13y ago
nbd, I wouldn't have written it if I'd have known it'd dominate the comments section like this. I probably would like him, and I would probably like Gumroad too if I used it - it looks well conceived and executed. Don't
63.
by dojomouse 13y ago
Nope. There are lots of much more interesting things in the article. That's just the one that jumped out at me as I read the first paragraph. And it's already got more screen space than it probably deserves. Onwards to other topic
64.
by dojomouse 13y ago
Exactly! And someone who says "Exponentially better" rather than "much better" is the kind of person who might have a button marked "proactively validate" rather than "confirm". At the same time, it&#
65.
by dojomouse 13y ago
It's not about whether UX is important or not - and I agree it is. It's about what 'exponentially better' means. Which is to say, nothing technical, and hence something buzzwordy without a solid foundation. It doesn&#x27
66.
by dojomouse 13y ago
'In his well-crafted pitch to get me to consider using Gumroad he ended with, “and the UX is exponentially better than other marketplaces.”' If someone tells me their thing is 'exponentially' better than something else,
67.
by dojomouse 13y ago
Because, to hear them talk, there aren't many other options :-)
68.
by dojomouse 13y ago
This is an absolutely awful idea, as it was every other time someone's had it. Consider the following: a) The maximum amount of energy you can get from some wind is a function of the velocity and density of the air and the projected
69.
by dojomouse 13y ago
True, but that means you're going to have some absolutely awesome bearing system that gives almost zero friction along the major axis of the pipe while also giving almost zero slop in the other axis. Which is damned hard. Adaptive magl
70.
by dojomouse 13y ago
Fair point - maybe that would allow the necessary flex. The minimum bend radius they allow for the 300mph segment is 3.67km. If you made a complete circle it would have a circumference of 23km, and comprise 769 30m segments. Each segment wo
71.
by dojomouse 13y ago
It's beyond me why the Hyperloop team missed the bus on the thermal expansion thing. It occurred to me immediately when I read it, and the several people I've mentioned it to since (engineers or not) have immediately realised why
72.
by dojomouse 13y ago
'slipping past pylons' during expansion would be a pretty terrible solution though. Can you imagine how hard it would be to keep it straight and level, to the tolerances required, while not even being able to fix it to the pylons?
73.
by dojomouse 13y ago
Opex won't be zero, but I don't think it'll be anything like HSR (or an aircraft). $20 seems too cheap. But I don't think $50 is out of the question at all if (and, agreed, big 'if') the capex costs are close t
74.
by dojomouse 13y ago
I think jerk could be kept much lower than in an aircraft though - in the hyperloop jerk would be basically 100% deterministic. You could design to keep it within reasonable limits. Sure, there might be minor imperfections in the tube surfa
75.
by dojomouse 13y ago
The capacity constraint accusation on the grounds of spacing and max G is pretty bogus. Firstly, there's nothing wrong with running at far more than 0.5g in an emergency. You think a plane stays below 0.5g when it crash lands? You just
76.
by dojomouse 13y ago
I find it even more annoying when they're not engineers, and their math is bad, and they get it totally wrong. The number of news stories I saw explaining the Hyperloop as 'like a big pneumatic tube' and showing the twitter p
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by dojomouse 13y ago
Aaron Patzer went into quite a bit of detail a year or two ago with a commuter medium speed Maglev concept. He since ditched it to focus on self driving cars because he felt they were more viable.
78.
by dojomouse 13y ago
No worries. I hadn't even seen the other article - you did me a favour.
79.
by dojomouse 13y ago
Definitely. This can totally change the economics too. If you calculate the ROI based on passenger numbers from the existing air travel market but your ticket pricing (and other factors - speed, comfort) is so good that ridership increases
80.
by dojomouse 13y ago
There have been several proposals I think. Last I heard it was dead. The problem is that it kind of sucks as a commercial proposition. A Hyperloop solution, on the other hand, wouldn't. I've done a basic profitability analysis on
81.
by dojomouse 13y ago
Do you mean the submitted article? I don't think I mentioned the g forces. I totally agree though. The g limit acceptable, especially in a reclined couch, is much higher than is applied. Would be a trade off with speed and curve radius
82.
by dojomouse 13y ago
I prefer many elements of the ET3 design. The problem is that it's not really moving. The 6% royalty is kind of ludicrous given the amount of work that's gone into it - if someone made a single line then ET3 would get billions of
83.
by dojomouse 13y ago
Do you mean the article submitted here? I don't think I mentioned the CHSR or Hyperloop capacity.
84.
by dojomouse 13y ago
I don't think there's any sort of real limit at 30 mins. Pushing it up to an hour is still fine without having to seriously address the 'what about the bathroom!" issue. And you can go quite a way in an hour at that sort
85.
by dojomouse 13y ago
I guess that'd be a good way to drive demand for physically isolated Hyperloop seating modules...
86.
by dojomouse 13y ago
They were pretty well done over in the threads for the original posting of the Tesla/SpaceX team's Hyperloop concept on here. I tend to agree with the "it's not that big a deal" sentiment. Usually you're not al
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The Hyperloop - Not just SF to LA(dojomouse.com)
30 points by dojomouse 13y ago|59 comments
88.
by dojomouse 13y ago
Really? I guess you got the tube part right.
89.
by dojomouse 13y ago
It depends on where you are. China is expanding their high speed rail network like crazy. 10,000km of line between 2007 (when it was created) and end of 2012. So the question is not whether projects like this can happen, but rather whether
90.
by dojomouse 13y ago
The great thing about the hyperloop, and other vactrain systems, is that you're at sea level... you're just not in atmosphere. The atmosphere can be restored in seconds. Sure, it'll stop the entire system and be a TOTAL pain

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