 |
|
|
|
|
|
| |
| |
|
|
|
|
| |
| |
|
|
http://www.youtube.com/watch?v=Ws6AAhTw7RA
http://www.youtube.com/watch?v=VyOtIsnG71U
--
- Warp
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Awesome. That explains why when you travel through time, you don't come out
six months later with the earth on the wrong side of the sun, right? ;-)
--
Darren New, San Diego CA, USA (PST)
How come I never get only one kudo?
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
In the History Channel 'UFO Files' at the end of one of the episodes a
young man levitates a triangle induced with 50,000 volts, he said at the
moment science can't explain it yet. On that series, a few people
researched how to levitate wood chair and other non-magnetic stuff in in
the passed century (1960 or later I think, I don't recall well), they
were supposedly hired by USA military, in the episodes they show
original footage made by the levitators.
I wonder why we don't have levitating commercial "planes", I think they
could be safer since you don't need to fly at high altitudes since it's
soundless, I guess carbohydrate fuel wins again, no electric cars neither.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Even when both are clean energy.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Saul Luizaga <sau### [at] netscape net> wrote:
> In the History Channel 'UFO Files' at the end of one of the episodes a
> young man levitates a triangle induced with 50,000 volts, he said at the
> moment science can't explain it yet. On that series, a few people
> researched how to levitate wood chair and other non-magnetic stuff in in
> the passed century (1960 or later I think, I don't recall well), they
> were supposedly hired by USA military, in the episodes they show
> original footage made by the levitators.
I wouldn't put too much trust in a TV show named like that.
TV shows are made for entertainment. They lie if they have to. Everybody
knows that, yet people still fall for it.
Now, if you give me actual references to peer-reviewed publications,
that's a different story. (And I'm not talking about the triangle levitating
thanks to the 50 kilovolts.)
> I wonder why we don't have levitating commercial "planes", I think they
> could be safer since you don't need to fly at high altitudes since it's
> soundless, I guess carbohydrate fuel wins again, no electric cars neither.
There's no known physics to make a plane levitate.
A superconductor levitates over a magnet because of the Meissner effect.
It requires a very specific set of circumstances which are quite hard, if
not impossible, to replicate for an airplane in normal outdoords conditions.
(Namely, the plane would have to be superconductive and floating above a
gigantic superpowerful magnet.)
--
- Warp
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On 18/10/2011 10:38 PM, Warp wrote:
> http://www.youtube.com/watch?v=Ws6AAhTw7RA
> http://www.youtube.com/watch?v=VyOtIsnG71U
That's just cool.
There are two things I can't figure out:
1. If it creates forces which hold the object in space, how come you can
still move it?
2. Why does the condensation rise upwards instead of downwards? That
makes no sense.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On 10/19/2011 8:26, Invisible wrote:
> 1. If it creates forces which hold the object in space, how come you can
> still move it?
It holds it at the same angle relative to the magnetic field. Those lines in
the video that get pinched going thru the superconductor are actually
infinite in number (i.e., it's a drawing of a field, not actual lines), so
as long as you don't try to move the pinches with respect to the field, the
thing can move thru the field. (See, for example, the speed bump part of the
video.)
> 2. Why does the condensation rise upwards instead of downwards? That makes
> no sense.
I thought it was the liquid nitrogen that was trapped inside the plastic
wrap boiling off. I assumed the plastic wrap was open on the top side of the
chip.
--
Darren New, San Diego CA, USA (PST)
How come I never get only one kudo?
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On 10/18/2011 10:39 PM, Saul Luizaga wrote:
> In the History Channel 'UFO Files' at the end of one of the episodes a
> young man levitates a triangle induced with 50,000 volts, he said at the
> moment science can't explain it yet.
If the levitating triangle was this:
http://en.wikipedia.org/wiki/Ionocraft then the guy was delusional or
flat out lying when he said that science can't explain it. The upshot
is that the voltage induces a slight air current through the triangle,
and since the triangle is very lightweight this is sufficient to lift
it. I believe it's not currently practical for "real-life" use because
the voltage source would weigh significantly more than the lift it
generates (which is why the demos you see are powered by an external
voltage source).
As an aside, I believe the Mythbusters covered the ionocraft in an
episode on levitation techniques. If I remember correctly the craft
worked, but took a large voltage supply to operate and, as you would
expect, didn't operate in a vacuum.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On 10/19/2011 9:29 AM, Darren New wrote:
> Those
> lines in the video that get pinched going thru the superconductor are
> actually infinite in number
I know jack-all about superconductors, so take this with a positively
enormous grain of salt, but I think this isn't accurate. The particular
sort of levitation that you see in the video is an example of flux
pinning, and is only possible with a particular type of superconductor
(a type II superconductor) with defects in its crystal structure. These
material defects are what traps the "lines" of magnetic flux relative to
the superconductor. Since there would only be a finite number of such
defects, there would be a finite number of "lines" where the field is
trapped as illustrated in the video.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On 10/19/2011 10:13, Kevin Wampler wrote:
> there would be a finite number of "lines" where the field is trapped as
> illustrated in the video.
Yes, but there are an infinite number of *possible* lines, so to speak.
There isn't a flux line every millimeter, with no ability for the device to
jump from one flux line to the next that's a millimeter away, in other words.
As long as the finite number of discrete flaws don't move to a different
strength of field, the device can move freely.
I.e., the confusion seems to be that someone thinks the flux lines are like
the lines you get sprinkling iron filings around a bar magnet and thinking
there's no magnetism between the filings.
--
Darren New, San Diego CA, USA (PST)
How come I never get only one kudo?
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
