dojomouse

12 ms·

91.
by dojomouse 13y ago
Above a certain speed wheels present huge issues, which means you need to change your drive mechanism and suspension mechanism. Also, drag is a huge killer of efficiency and hence overall economics. Even at 500kph the drag on a train at sea
92.
by dojomouse 13y ago
Really specifically, an affordable Tesla would (at least initially) benefit only those who were able to buy an affordable Tesla given the still significant cost and Tesla production constraints. They both have the potential to be hugely ben
93.
by dojomouse 13y ago
Actually Bill Gates is on record saying that if he had 'one wish' it would be for an awesome low emissions energy source. When you consider the growth in air travel, and the fuel options for air travel, the Hyperloop IS effectivel
94.
by dojomouse 13y ago
The Shanghai maglev has no security at all... or at least not last time I went on it. Neither do any of the European HSR systems I've been on. Remember a big part of TSA isn't to protect the people on the planes, but to protect ot
95.
by dojomouse 13y ago
You don't need to wait until expiry to sell. There is a lot to be said for options if you use them carefully. Yes, risk is higher with high leverage and a narrow portfolio. But returns can be also. I think the line about risk adjusted retur
96.
by dojomouse 14y ago
Careful with your years. Teslas 2012 revenue will break $400mil. 2013 will likely break $1bil.
97.
by dojomouse 14y ago
$50k to $100k gives a pretty wide margin of error too :-)
98.
by dojomouse 14y ago
Same back at you - tzs's comment is entirely reasonable. The point is that statistics collected from a situation with a higher similarity to the one you're trying to predict can provide a better indicator than general statistics, even if th
99.
by dojomouse 14y ago
$100k/mile seems more reasonable given typical suburban rd pricing (~$200k/mile). Hugely dependent on how much the right of way has to be refrigged first I guess.
100.
by dojomouse 14y ago
Electric assist bikes are making this far less of an issue. My relatively aged parents had no trouble riding 70km with 1800m of climbing. The happiness, health, and environmental benefits remain.
101.
by dojomouse 14y ago
Possible, but not efficient. The drag of the air against the interior of the tube will be really high. Much better is to suck all the air out, and use another drive system (maglev with linear motors).
102.
by dojomouse 14y ago
For what it's worth I think the energy related claims are pretty weak. Technically you can store energy in the kinetic energy of the mass moving at speed, and with diamagnetic ('quantum') levitation the losses are very low... however the co
103.
by dojomouse 14y ago
I'm pretty sure it's some variant of maglev in an evacuated tube. Daryl Oster (www.et3.com) has been pushing it for quite a long time. The big difference is that Musk has the contacts and personal background to possibly make it a reality on
104.
by dojomouse 14y ago
I don't know - no - but I'd bet a large chunk of change that the HyperLoop is some variant of vacumn tube maglev. Not an idea Musk came up with by any stretch, but he's someone who might actually be able to make it happen which would be ver
105.
by dojomouse 14y ago
I'd bet a large chunk of change that the HyperLoop is some variant of vacumn tube maglev. Not an idea Musk came up with by any stretch, but he's someone who might actually be able to make it happen which would be very awesome. His patent is
106.
by dojomouse 14y ago
It's only far away if you want to work in pure hydrogen, which is ideologically simple but not really required. Synthesis of methane from hydrogen is easy and efficient and (pretty) cheap - use atmospheric co2 as carbon feedstock. A German
107.
by dojomouse 15y ago
Also frighteningly ambitious is the prospect of any meaningful startup driven disruption in the energy industry. Which is a worry considering how desperately disruption is needed.
108.
by dojomouse 15y ago
The tl;dr version: Need a technology stack for the web/cloud side of a distributed control platform able to server 2000 connections simultaneously with up to 100bytes bidirectional data/second per connection. Reliability and security are im
109.
Ask HN: Good technology stack for IP based Distributed Control Platform?
2 points by dojomouse 15y ago|1 comments