elihu

64 ms·

901.
by elihu 5y ago
...also, shipping high-value time-sensitive things across the planet in a few hours or less may be a viable business model.
902.
by elihu 5y ago
Economic incentives include government-funded basic science, mining, tourism, real-estate speculation (i.e. claim a bunch of land while it's cheap), entertainment (sports and movies/TV shows), the ability to do things in a presuma
903.
by elihu 5y ago
In the video Elon makes an estimate of a million tons to Mars (if I remember correctly) in order to establish an entirely self-sufficient colony there. Building orbital manufacturing would be a different kind of problem, but in some respec
904.
by elihu 5y ago
Well, the energy output of the reactor is limited by the amount of energy you can get out, which is limited by how much coolant you can move through it and how much energy the coolant can absorb without boiling/exploding. The MIT SPAR
905.
by elihu 5y ago
Probably not. Steam turbines are a pretty mature technology, though I suppose you'd want to use the most efficient kind of turbine available if energy output isn't overwhelmingly bigger than energy input. edit: since JET is used
906.
by elihu 5y ago
ReBCO tape is the specific high-temperature superconducting material they're using. Another important material is FLiBe, which is a liquid that I think absorbs the energy from the fusion reactor. I don't really understand the pro
907.
by elihu 5y ago
I think one could reasonably say that a car shouldn't be expected to save the driver from all situations when the self-driving features are just a backup system and the driver is expected to be in control. However, those features shou
908.
by elihu 5y ago
(Note from the link: that's the requirement to provide fuel for one starship launch every 26 months.)
909.
by elihu 5y ago
I think a reasonable standard is: if someone dies, is seriously injured, or likely would have died or been seriously injured if the driver hadn't intervened in a situation that a normally competent driver wouldn't have had a probl
910.
by elihu 5y ago
Seems like the sort of thing you'd use for a drum kit patch (each key is a different kind of drum), but I suppose that wasn't a standard thing when the DX7 came out and wouldn't be for awhile. This demonstrates the factory pa
911.
by elihu 5y ago
I think this is probably a good idea, but not as an extension of the current no-fly list, which is opaque and lacking accountability. The "disruptive passenger" no-fly list should have clear criteria for why people are put on it a
912.
by elihu 5y ago
> The article also completely ignores the concept that distributed generation can actually reduce infrastructure needs. If you're generating the power at the "last mile" and sending it to your neighbor, that power doesn&#x
913.
by elihu 5y ago
I wonder if the pool can tolerate freezing solid in the winter, or if it cracks the concrete? Flat roofs might be okay if they're built right. In Oregon, people would look at you funny if you built a house with a flat roof, and yet a
914.
by elihu 5y ago
addblock on/off, javascript on/off, vpn on/off, qwerty/dvorak, default editor is vim/emacs, indentation is tabs/spaces, the dress is blue and black / white and gold, fund police/defund police, those a
915.
by elihu 5y ago
That may be true of some rotary enthusiasts still; I don't really know that many. I could see it being more of a thing with RX-7s, which are kind of rare and expensive. RX-8s aren't super common, but they're also not hard t
916.
by elihu 5y ago
I wish that were literally true, it would have been a lot easier. Those engines are heavy (especially with the exhaust manifold/alternator/flywheel/etc.. hanging off it).
917.
by elihu 5y ago
Yeah, that makes sense. EVs need motors and someone has to make them. Manufacturers will buy whatever has the best specs for the least cost that matches the vehicle. Some companies will naturally specialize on motors, even though motors
918.
by elihu 5y ago
I basically agree with that, though I'd say that lower voltage motors are sometimes useful in conversions, since they usually have a smaller battery pack than what would be in an OEM vehicle (due to weight, cost, and having limited spa
919.
by elihu 5y ago
I don't. I've been meaning to, just haven't gotten around to it. There's a guy in the UK doing a pretty similar conversion documented on Youtube. He's using a Leaf motor and batteries I think. https://
920.
by elihu 5y ago
None. I bought the car with a bad engine in the first place, so it's not like I threw away a perfectly good engine. (I even took the old engine to a guy that rebuilds rotaries; he took it apart and said there weren't any parts t
921.
by elihu 5y ago
Permanent magnet motors sometimes use rare-earths. It's not absolutely necessary, but going without may lose some power and/or increase the weight. Induction motors don't need permanent magnets, but they're less effici
922.
by elihu 5y ago
The scrap metal isn't really worth all that much. Maybe the cat is worth something. I do agree though that it'd be great to be able to buy new high-performance conversion motors for a reasonable price. (I'm working on an
923.
by elihu 5y ago
There will probably continue to be a future for liquid fuels (especially for aviation) for quite some time, but ICE vehicles are only cheap because we can get fuel out of the ground and don't have to pay the energy or climate impact co
924.
by elihu 5y ago
You might be thinking of LiquidPiston's engine.
925.
by elihu 5y ago
This is kind of vaguely similar to LiquidPiston's engine[1], which is sort of like a wankel engine turned inside out. (This has a couple benefits. The equivalent of apex seals can be on the non-moving part of the engine and thus are
926.
by elihu 5y ago
It comes up when you're dealing with large amounts of data; you go to evaluate the value of a function and it crashes because the stack limit was exceeded. (Ghc changed some things awhile back so that it just allocates more memory now
927.
by elihu 5y ago
It seems to work pretty well for the things I've used it for. There are some problems that are better served by an imperative solution with in-place mutable array operations and so on, but the ST monad works pretty well for that. I th
928.
by elihu 5y ago
That's the approach I've been advocating. Electrified roads (even if it's only short, regularly spaced intervals on major highways) make so much more sense than expecting everyone who wants to drive more than an hour or two
929.
by elihu 5y ago
I'm surprised that JWST isn't actually all that much bulkier than Hubble, despite the mirror(s) being so much larger. In retrospect I guess that makes sense, since much of Hubble's bulk is the long tube enclosing the mirror,
930.
by elihu 5y ago
You probably wouldn't use DIP packages in most modern designs unless it's a low-volume part that you don't mind hand-soldering. However, DIP packages have been used for so long in so many things that the most common DIP ICs

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