a "killer" app..

[Robert Baer]

Note, in Business Week Sept 6 Pg99, of "..a ray to disable or fry
electronics in a car .. to stop it".
Initially 2 B used in LA.

 

[Bill Bailley]

Note, in Business Week Sept 6 Pg99, of "..a ray to disable or fry
electronics in a car .. to stop it".
Initially 2 B used in LA.

I guess it won't be long before an antenna to help that process will be
built into the wiring harness of all cars. I'm all for it. Too many innocent
deaths in high speed chases.

Bill.

 

[John Woodgate]

I guess it won't be long before an antenna to help that process will be
built into the wiring harness of all cars. I'm all for it. Too many
innocent deaths in high speed chases.

But such a facility could, and undoubtedly will if it is implemented, be
immediately used by terrorists, hi-jackers and rapists, to their own
advantage.

 

[Bill Bailley]

But such a facility could, and undoubtedly will if it is implemented, be
immediately used by terrorists, hi-jackers and rapists, to their own
advantage.

Oh dear! Stepped on it again.

You are right John. I didn't think it through far enough. What a complicated
world, populated with very real threats, we live in.

Can we squeeze some strong encryption into this to make it a little tougher
for today's Uglies? Seems a shame to fry a micro with raw power when a
little software finesse may do just as well.

Regards,

Bill.

 

[John Woodgate]

Oh dear! Stepped on it again.

You are right John. I didn't think it through far enough. What a
complicated world, populated with very real threats, we live in.

Can we squeeze some strong encryption into this to make it a little
tougher for today's Uglies? Seems a shame to fry a micro with raw power
when a little software finesse may do just as well.

Even if the law officers use encrypted data to shut down the engine
management system without damage, once it has a port that accepts r.f.
signals the villains could use a high energy transmission to destroy the
system.

 

[Bill Bailley]

Even if the law officers use encrypted data to shut down the engine
management system without damage, once it has a port that accepts r.f.
signals the villains could use a high energy transmission to destroy the
system.

That's it !!!!
I'm damn well going bush. Got me swag. Got me tucker bag. Got 40lbs of
kangaroo jerky and three vitamin pills. I'll be right. I even have my Slim
Dusty record collection and my VCR tape of "Welcome to Woop Woop" Goodbye
cruel world.

Bill. ( The disenchanted)

 

[John Woodgate]

I'm damn well going bush. Got me swag. Got me tucker bag. Got 40lbs of
kangaroo jerky and three vitamin pills. I'll be right.

As long as you steer clear of billabongs and coolibah trees. I'd also
recommend some water to wash your jerky down with. Give my regards to
the Black Stump.

 

[Pooh Bear]

I guess it won't be long before an antenna to help that process will be
built into the wiring harness of all cars. I'm all for it. Too many innocent
deaths in high speed chases.

I've seen 'World's Stupidest Police Videos' too !

US police officers seem too keen to use their vehicles like weapons.

The ray gun idea is amusing though. Would have to have a very narrow beam to
avoid bringiing *all* the traffic to a halt.

Before the adoption of large scale radar in the UK prior to WW2 - certain
'inventors' were amusingly touting the spurious idea of a death ray to defend
Britain from Nazi bombers. Funny but true.


Graham

 

[Ken Smith]

Note, in Business Week Sept 6 Pg99, of "..a ray to disable or fry
electronics in a car .. to stop it".

According to the Califoria police, they already have a state of the art
device that will stop a car. You just have to point it at the engine and
pull the trigger. It sometimes requires two applications but so far never
three. They call this device a shot gun.

 

[John Woodgate]

I read in sci.electronics.design that Pooh Bear <rabbitsfriendsandrelati

Before the adoption of large scale radar in the UK prior to WW2 -
certain 'inventors' were amusingly touting the spurious idea of a death
ray to defend Britain from Nazi bombers. Funny but true.

Well, I don't think scoffing is in order. Tesla and Yagi, who both made
significant contributions to electrical science, would certainly not
have ruled it out. In fact, the British Defence Ministry (or whatever it
was called then) asked a panel of eminent physicists whether it was
feasible, and the answer was more like 'we don't know how, and we don't
think anyone else does' rather than 'it's impossible'. In fact, we know
now it isn't impossible and we know how to do it, but there are enough
problems with it to make it unattractive as a weapon (or so we are
told).

 

[John Larkin]

Before the adoption of large scale radar in the UK prior to WW2 - certain
'inventors' were amusingly touting the spurious idea of a death ray to defend
Britain from Nazi bombers. Funny but true.

Watson-Watt began by seriously researching exactly that idea. His
folks ran the math and concluded that they couldn't kill a plane with
RF, but they could detect it. So the good guys won the Battle of
Britain.

John

 

[John Larkin]

According to the Califoria police, they already have a state of the art
device that will stop a car. You just have to point it at the engine and
pull the trigger. It sometimes requires two applications but so far never
three. They call this device a shot gun.

Black powder has a much higher volumetric energy storage factor than
any capacitor dielectric.

John

 

[Michael A. Covington]

Oh dear! Stepped on it again.

You are right John. I didn't think it through far enough. What a
complicated world, populated with very real threats, we live in.

Can we squeeze some strong encryption into this to make it a little
tougher for today's Uglies? Seems a shame to fry a micro with raw power
when a little software finesse may do just as well.

Or just rig the car to emit a VERY LOUD NOISE when this is done to it...
maybe trigger a non-resettable horn relay, so the car will honk until the
battery runs down. That would provide at least a little protection.

 

[Ian Stirling]

Black powder has a much higher volumetric energy storage factor than
any capacitor dielectric.

Not vacuum.

The plates are an issue of course.

 

[Ian Stirling]

Black powder has a much higher volumetric energy storage factor than
any capacitor dielectric.

Not vacuum.

The plates are an issue of course.

And as to energy density/Kg, it can't be beat.

 

[John Larkin]

Not vacuum.

The plates are an issue of course.

And as to energy density/Kg, it can't be beat.

Hmmm, what sort of volumetric energy density can be had in a vacuum
cap? At some point, the e-field bodily rips atoms out of the plates,
somewhere around 1e10 v/m I think. As a practical matter, anything
above a couple of megavolts is unusable, and power conversion
electronics works reasonably only into the 10s of KV.

So one cubic meter of vacuum cap is 9 pF, charged to 1e10 volts, gives
us 450 megajoules, not too bad. I wonder what's the force on the
plates? But a cubic meter of gasoline would store more energy and be
rather easier to work with.

Right, the energy/kg of a vacuum is pretty good.

John

 

[Ian Stirling]

Hmmm, what sort of volumetric energy density can be had in a vacuum
cap? At some point, the e-field bodily rips atoms out of the plates,
somewhere around 1e10 v/m I think. As a practical matter, anything
above a couple of megavolts is unusable, and power conversion
electronics works reasonably only into the 10s of KV.

That's why I said the plates are a problem.
I think you can store much more energy in vacuum, if they werent.

I think the ultimate limit comes when you've got so much energy in
there that you start to get assorted particles popping out of nowhere.

So one cubic meter of vacuum cap is 9 pF, charged to 1e10 volts, gives
us 450 megajoules, not too bad. I wonder what's the force on the
plates? But a cubic meter of gasoline would store more energy and be
rather easier to work with.

Very true.

 

[Dimitrij Klingbeil]

That's why I said the plates are a problem.
I think you can store much more energy in vacuum, if they werent.

Would not the tunnel effect still rip a lot of electrons from the plates
under these circumstances, no matter what the mechanical strength of them
is. Besides, the principle of uncertainity may just help to get electrons to
the wrong plate as well (provided the distance is small enough, which seems
likely for Xe10 V/m with only Xe3 V available).

If it wasn't for issues like these, that crazy EER guy would likely turn out
to be right with his 'advanced dielectric' approach after all

 

[Ken Taylor]

I guess it won't be long before an antenna to help that process will be
built into the wiring harness of all cars. I'm all for it. Too many innocent
deaths in high speed chases.

Bill.

While there's no arguing that one is 'too many', just how many deaths do you
think occur because of high-speed chases? It's a bizarre solution to an
almost non-existent problem, a back-door attempt at Big Brother-type
control.

Ken

 

[Clifford Heath]

While there's no arguing that one is 'too many', just how many deaths do you
think occur because of high-speed chases?

Monthly or so in this country, often innocents, despite assorted
policies of abandoning the pursuits.