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On Fri, 23 Jan 2009 13:02:16 -0600, Mike Raiford wrote:
> Jim Henderson wrote:
>>
>> I just had a picture flash through my mind (if you'll pardon the pun)
>> of a case made out of pure Magnesium. In my mind's eye, it didn't last
>> very long, but it was spectacular. :-)
>>
>> Jim
>
> Something like ...
>
> http://macenstein.com/default/archives/1405
Yes, something like that - I'd forgotten all about the NeXTCube.
Jim
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clipka wrote:
> Patrick Elliott <sel### [at] npgcable com> wrote:
>>> - It appears that "solid state harddrives" are now reaching useful sizes
>>> and sane pricing levels. (E.g., when I first looked at this it was
>>>
>> Only problems are: a) slow (faster isn't much faster, and costs double),
>> and b) limited number of "write cycles". And, no, the 250GB one is not
>> $2/GB. lol
>
> Just recently read about SSD's; two things to consider:
>
> - If they're reasonably good quality, it seems you can't really "kill" them,
> even in years of excessive abuse... because they can only do so many write
> cycles a second ;)
>
> - If you don't need to *write* too much, then faster *is* much faster! (Don't
> try to replace a speed-optimized RAID box that already maxes out the connection
> speed though ;))
>
Well, I updated the 8GB SSD in my Asus 900A with a 64GB. I had two
choices, a slower Patriot for $96, or a Runcore, for $178... Yeah, would
nice to have it faster, but... not at double the price. I would "much"
rather have a 1TB device that I could throw at a wall without breaking
it, but.. we just don't have it yet. ;) lol
--
void main () {
if version = "Vista" {
call slow_by_half();
call DRM_everything();
}
call functional_code();
}
else
call crash_windows();
}
<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models,
3D Content, and 3D Software at DAZ3D!</A>
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>> I'm still puzzled about the Race of Champions. They raced several
>> designs of car which seemed to be using *external combustion* to propell
>> themselves, rather than the more traditional *internal combustion*. (As
>> evidenced by the huge flashes and bangs as they raced round the track.)
>
> Military planes do it, so why shouldn't a car benefit from an afterburner,
> too?
> =B)
Because to get any remotely significant extra acceleration you would use up
the whole fuel tank in 10 seconds :-)
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>> Maybe someone could find a way to convert the sound energy from an engine
>> into mechanical or electrical energy...
>
> Some do, in a way: Resonance exhausts. They're designed to use the
> acoustic
> "bang" produced when a cylinder is opened to expel the exhaust gases, to
> resonate in the exhaust system in such a way that a lower-than-average
> pressure
> is achieved when the next cylinder opens, helping expel it.
>
> Probably must be tuned to some certain rpm optimum though.
Oh yes, that is done already in most (all?) modern cars, the length and
geometry of how the individual pipes from each cylinder join up together is
very important in making an efficient and powerful engine. In road cars of
course efficiency is usually the design goal (and the designed rpm is much
lower) rather than overall performance, but sometimes in sportier cars and
racing cars you definitely really tune the exhaust for a high rpm (usually
around maximum power revs), this results in the exhaust system getting
noticeably louder at a certain point.
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Stephen wrote:
> On Fri, 23 Jan 2009 12:46:14 -0600, Mike Raiford <"m[raiford]!at"@gmail.com>
> wrote:
>
>> Of course, I don't know how well Mg deals with heat.
>
> Woosh! Thermite :)
Not nearly as hot as thermite, but it can be (and is) used to start a
thermite reaction.
--
~Mike
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> Not nearly as hot as thermite, but it can be (and is) used to start a
> thermite reaction.
But did you ever try to light a piece of Magnesium?
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scott wrote:
>> Not nearly as hot as thermite, but it can be (and is) used to start a
>> thermite reaction.
>
> But did you ever try to light a piece of Magnesium?
>
No ... But from what I've seen, the strips used as a fuse can be
somewhat tricky to light.
--
~Mike
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> No ... But from what I've seen, the strips used as a fuse can be somewhat
> tricky to light.
From what I remember at school we had to put the bunsen burner on the "hot"
setting and hold the Mg strip in it for a few seconds before it lit. I
don't think you're going to accidentally light it at home...
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scott wrote:
>> No ... But from what I've seen, the strips used as a fuse can be
>> somewhat tricky to light.
>
> From what I remember at school we had to put the bunsen burner on the
> "hot" setting and hold the Mg strip in it for a few seconds before it
> lit. I don't think you're going to accidentally light it at home...
I lit a thin magnesium ribbon with a match.
OTOH, a nice solid lump of it probably won't burn too well. I hear they
make pencil sharpeners out of it. (Or, more likely, some alloy of it.)
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Invisible wrote:
> scott wrote:
>>> No ... But from what I've seen, the strips used as a fuse can be
>>> somewhat tricky to light.
>>
>> From what I remember at school we had to put the bunsen burner on the
>> "hot" setting and hold the Mg strip in it for a few seconds before it
>> lit. I don't think you're going to accidentally light it at home...
>
> I lit a thin magnesium ribbon with a match.
>
> OTOH, a nice solid lump of it probably won't burn too well. I hear they
> make pencil sharpeners out of it. (Or, more likely, some alloy of it.)
Great. Now I'm just going to HAVE to get a pencil sharpener and set it
ablaze. Thanks Andrew :)
--
~Mike
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