Common mistake of lasers being visible was all over the place in the alarm systems.

The real question though is about how they used electromagnetic pulse (emp) to shut the power for about 30 seconds and the device they used. Does such a device exist that could create a emp to brown out a city the size of Las Vegas for about 30 seconds? Sounds fishy to me.

On another note...if you watch closely you can catch a glimpse of me in the movie. As Clooney and Pitt are leaving the circus and walking through the parking lot, there is a large, dark haired man in a bright blue top walking around behind them. That would be yours truly [img]/phpBB/images/smiles/icon_smile.gif[/img]

Rob

Hey, pretty neat, H-B... you're immortal!

I remember reading long ago about an installation the military set up somewhere (Florida, maybe?) to test EMP hardening without having to set off a nuke to do it. The memory is hazy, but I believe it was a very large (acres?) array of antennas and required a vast amount of power. I doubt that there's a "pocket-sized" or even "tractor-trailer-sized" device that could do this.

Even more problematically, a nuclear EMP doesn't just shut down equipment temporarily -- it fries the electronics permanently. Junction transistors are the most sensitive to this effect as they have very thin regions (e.g. the "P" in an "NPN" transistor) that are especially prone to break down under EMP. MOS transistors are more resistant to the effect, and that is the most common technology these days... but I imagine that the small geometries of up-to-date microcircuits would be more vulnerable than older, larger-featured devices.

Military electronics often use "EMP-hardening", which involves a whole toolkit of techniques, beginning at the microcircuit level and extending right up to the macroscopic mechanical design of enclosures and such. However, this is costly and is not routinely employed in civilian electronics design.

In short, if what you're after is a temporary blackout, I don't think EMP is your best choice.

No really? Really really? How come? Why are you there! Explain in more detail!

EMP thing sounds fishy, the only EMP stuff I know about is the one generated by the detonation of fission/fission-fusion devices (a.k.a. nukes [img]/phpBB/images/smiles/icon_smile.gif[/img] ). As he said: knocked out permanently (I don't know it as precisely as he does, but I know they die permanently).

Best bet to cut current is actually to cut the wire, or throw off the switch I believe [img]/phpBB/images/smiles/icon_smile.gif[/img]

Hmm... Apparently, non-nuclear EMP weapons ARE possible, but no, not as hand-held devices. Lemme dig up that link though... Ah, here it is:
EMP weapons
http://popularmechanics.com/science/...mb/print.phtml

What? The movie's got a comet walking around on the ground?! Now that's Bad Astronomy! [img]/phpBB/images/smiles/icon_wink.gif[/img]

__________________
SeanF

"Ask to understand, but don't challenge unless you have the knowledge."--NEOWatcher

The contents of this post are ©2008 by SeanF and may not be copied or retransmitted in any form without the express written consent of SeanF

No, just Hale and Bopp. That's why he's so large.

I was in Florida at the time and gave them my headshot when they called for extras and got lucky. I am just a little easier to find than Waldo [img]/phpBB/images/smiles/icon_smile.gif[/img]

The device they use is referred to as a "pinch" and is about the right size to fit in the back of a van. Not quite pocket size, but transportable. They make reference to emp when descirbing how it works. They steel it from a research lab in California...can't remember if they name the specific lab or not.

Anyway, based on my limited knowledge of emp, I thought it sounded like a cheap plot device!

So, in the name of good science, does anyone know a way you could cause a temporary blackout on the order of 30 seconds to a major metropolitan area without doing any apparent lasting damage to the electrical system?

Rob

Hmm. Set up next to a substation, let the pinch go, some sort of relay gets tripped, and takes a few seconds to reset?

Donnie B. is correct. An EMP would either permenently fry any electronic device or have no noticable effect. Lightning produces an EMP-like effect, but most of you have probably used cell phones, TV's, or computers during an electrical storm with no noticable effect.

Power systems are designed to handle faults. So a small EMP device may cause a fault, but since the pulse is short lived, the relays would automatically flip back on in about second. My guess is you can either have a large EMP which would fry the fault detection circuits and cause a long term blackout and mass hysteria, or you can have small EMP which do little more than cause the lights to flicker.

Bribe a guy at the power station to pull the Big Switch for a minute?

Wiley

Sure, that might be the reality of it, but aren't we also considering plausible scenarios--in support of the fictional plot? Just increase the EMP a little, stretch the reaction time from a second to thirty seconds, maybe take advantage of a possible design flaw...and it's in the realm of the possible.

Me thinks this would be the cheapest solution.

Ah, yes. You're right. Excuse me, but I must go suspend my disbelief.

[img]/phpBB/images/smiles/icon_smile.gif[/img]

I know I left my disbelief hanger around here someplace...

Concerning "Oceans 11" --
I think in the original movie (starring Frankie and the Rat Pack,) they just blew up a desert tower along the main grid leading into Las Vegas. Cheaper, but also less high tech than a hand held EMP device.

As for "Hale Bopp" walking around. It's not the comet, it's the astronomers. Perhaps Mr. Hale and Mr. Bopp are too young to enter Las Vegas nightclubs. So one stands on the other's shoulders, and they wear a long trench coat creating one long astronomer. [img]/phpBB/images/smiles/icon_biggrin.gif[/img]

I haven't seen the show but but what y'all said about it sounds implausable. Having worked on the control systems for the electric grid in (and around) Las Vegas, I can give you some information on how things work. I can also tell you, one would have to have a REALLY fancy gizmo to knock it down for even a second.

Each casino has it's own independant sub station in the sub basement of the complex. It has a 1/2 phase (1/120th second) failure switching relay to the city grid. If the city grid is also down each casino has deisel powered generators on site to take the load after 3 cycles (1/20th of a second). In short, if you know what you're looking for, you MIGHT notice the lights flicker.

In order to take down any/all of the casinos you have to hit all three points at each site. Even a nuclear EMP would not take the whole system down as the deisels are on hard wired logic and will start from lead/acid batteries. An EMP might knock down all of the computer systems but not the electricity system. The casinos may have the computers covered too. I have heard (but don't know for sure) that everything in the casino locks up on total power failure (they call it TPF). I know this because my control system had a hold up contact that fed the TPF input to one of the security computers. If there is a TPF everything locks up before the lights fail.

None of this is astronomy but what the heck? I may not know a whole lot about astronomy but I do know about the LV power system.

Mystery solved! Russ is an electrical engineer, I wondered what he did in engineering more precisely, but there you have it! [img]/phpBB/images/smiles/icon_smile.gif[/img]

Thanks Russ! [img]/phpBB/images/smiles/icon_smile.gif[/img]

Russ, I'm not sure I understand. Could you please forward schematics of all the casinos and their power sources, including back-ups? And just for the heck of it, maybe you could include your best guess on exactly where to place explosive charges just to help me out on my purely academic theorizing regarding the knocking-over of said casinos?

Hmmm? Please?

I agree with Garette's logic, and I'm in, that's 2 of 11, right? [img]/phpBB/images/smiles/icon_biggrin.gif[/img]

Make that 3. [img]/phpBB/images/smiles/icon_wink.gif[/img]

Hey! Quit padding your posts!!

[img]/phpBB/images/smiles/icon_wink.gif[/img]

CJSF

__________________
Two years ago moved from my town
I was looking up past the city lights
But the city lights got in my way

See the constellation ride across the sky
No cigar, no lady on his arm
Just a guy made of dots and lines

-from "See The Constellation"
by They Might Be Giants

Thank you Mr. X! I think?! [img]/phpBB/images/smiles/icon_eek.gif[/img] I hadden't realized that my professional credentials were such a mystery. It's so nice to know somebody cares. [img]/phpBB/images/smiles/icon_biggrin.gif[/img] [img]/phpBB/images/smiles/icon_rolleyes.gif[/img]???


edit to correct code

<font size=-1>[ This Message was edited by: Russ on 2001-12-18 13:54 ]</font>