msl

11 ms·

91.
by msl 9y ago
The F1 engine [1] (Saturn V, first stage) used another interesting way to improve efficiency with a gas generator cycle: using the turbopump exhaust gas as a cooling film in the engine nozzle. The fuel-rich exhaust was relatively cool compa
92.
by msl 9y ago
I just tested it with Wine. The process seemed to consume about 320MiB of RAM.
93.
by msl 9y ago
If you use Firefox, go to about:config and set "media.autoplay.enabled" to false. A few web sites throw a fit when they can't autoplay, but that's a price I'm willing to pay.
94.
by msl 9y ago
> I feel that this is up to government regulation. The government should prevent unsafe cars from entering the road, not leave it up to the judgment of car-company CEOs. Unfortunately, this might be asking your government a bit too much.
95.
Car Hacking: The definitive source(illmatics.com)
2 points by msl 9y ago|0 comments
96.
by msl 9y ago
Plastics tend to consists of carbon and hydrogen chains. See for example polycarbonate [1], polyetene [2] and ABS [3] (contains nitrogen). They might however contain all sorts of additives. In order to produce just water, carbon dioxide and
97.
by msl 9y ago
A heat pump extracts thermal energy from, say, air. Electricity is not converted into heat, but used to create a temperature difference (one part of the system gets colder, the other gets hotter). This is vastly more efficient than using re
98.
by msl 9y ago
The space shuttle Columbia was destroyed with all hands after it was hit by some insulating foam from its own external propellant tank [1]. The noise from its launch was also a serious threat [2]. I think it is fair to call it fragile. Of c
99.
by msl 9y ago
Well, this is NASA. They are not exactly rolling in cash. Maybe you could look at it as a sort of a voluntarily paid tax, earmarked for space exploration? I, for one, would be happy to donate some of my time for the cause, if they were wi
100.
by msl 9y ago
Why? What will kill it before then? What kind of a battery would have a long enough shelf life?
101.
by msl 10y ago
> None of it put any infrastructure for the long-term access of space into place, or anything to make future moon landings easier. This is not entirely fair. The actual landings (which did teach us a lot about the moon) were just the tip
102.
by msl 10y ago
Are we looking at the same image? The one I see shows a search for the term "hdtv" with some results from an idexed site. I really can't see how the user has in any way violated anyone's copyright. Edit: Removed an irrel
103.
by msl 10y ago
I really cannot see copyright being violated in that screenshot. It is just a listing of torrent files available on one of the indexed sites. You could use Google search to produce a similiar effect (showing links to torrent files being hos
104.
by msl 10y ago
One thing that the Space Shuttle had going for it was that it could be used as a Canadarm[1] platform. Bringing the arm back home in one piece was handy, and the orbiter's huge mass probably made it easier to reason about the physics i
105.
by msl 10y ago
You don't need to wear a space suit aboard the space station. These suits are worn mostly just during launch and returning to the surface - a few hours or a couple of days at a time.
106.
by msl 10y ago
The Soviet Union managed to produce their Soyuz-U rockets at a higher pace than that some four decades ago [1] while achieving a success rate of > 97%. Sure, it's a different rocket with different capabilities, but it was also a lon
107.
by msl 10y ago
While I can not from the top of my head think of all that many actual books, I would recommend considering a couple of tv series: From the to Earth the Moon [1] and Moon Machines [2]. The former is based on a book [3], but I have not re
108.
by msl 10y ago
A GPS receiver is not supposed to work at an altitude greater than 60000 feet or while travelling at over 1000 knots, but the system itself does not in any way enforce this restriction [1]. [1] https://en.wikipedia.org/wiki&
109.
by msl 10y ago
> Galileo was originally designed to be on an independent frequency, and the US has pushed to have it so close to the US GPS frequency that jamming will effectively kill both. This (as I wrote in another comment) is the exact opposite of
110.
by msl 10y ago
The "patch" was changing to a different frequency band, allowing anyone to block only one system without affecting the other [1]. This is very much different from being able to turn it off. [1] https://en.wikipedia.org&
111.
by msl 10y ago
And anyone interested in the history of old NASA computers might enjoy this: http://history.nasa.gov/computers/contents.html
112.
Open-V: The World's First Open Source RISC-V-based 32-bit Microcontroller(crowdsupply.com)
38 points by msl 10y ago|19 comments
113.
by msl 10y ago
Nuclear reactors have actually been launched into space multiple times [0][1]. Note, however, that their power output was on the order of a few kilowatts. [0] https://en.wikipedia.org/wiki/US-A [1] https://e
114.
by msl 10y ago
> You pay for the cost of government elementary schools even if you homeschool your kids. Which means that your kids will live in society largely made up of people who have received some education. You could argue that there is more valu
115.
by msl 10y ago
The Wikipedia article on Cascading failure [0] lists a few examples of this kind of a large scale grid failure. You start by taking one (or some) power plants down, thus overloading others trying to reblance the system, and possibly failing
116.
by msl 10y ago
Not every two countries use mutually incompatible mains systems; see for example [0] to see a real time map showing an electricity market with multiple nations as participants. Note also, that your AC grids do not need to be compatible to t
117.
by msl 10y ago
> You could buy quite a few solar panels and lease several electric cars for less than it would take to move to NYC. Neither of which is nearly as good for the environment as simply using less energy. Solar panels and electric vehicles t
118.
by msl 10y ago
I am not sure I would call not building two space stations for the purposes of the program crazy. Remember, that the Apollo program was initiated before anyone had performed an orbital rendezvous of any kind. For quite some time the preferr
119.
by msl 10y ago
Could you elaborate a bit? What was "the crazy scheme of Apollo?"
120.
by msl 10y ago
It is quite unclear. It seems, however, that it runs at 5 volts, so I guess we are looking at 370mW and 1,15W. Explaining the power requirements clearly would really be important for a product like this.

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