I've got better things to worry about.
EMP good to know item regarding vehicles
- Thread starter O.S.O.K. 1961
- Start date
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Though dated (2004) here’s an executive summary of the impact of a catastrophic EMP attack.
http://www.empcommission.org/docs/empc_exec_rpt.pdf
http://www.empcommission.org/docs/empc_exec_rpt.pdf
Thanks for posting this....long.... but did read......in the 14 years since this report, one would hope they have been actively working on preparedness.......
But know the Feds and politicians, it is entirely possible for politics to muck up the works............
jordanmills
TGT Addict
They're more worried about a direct overt attack against critical infrastructure, like someone driving a bomb up to a power generation station.
So a Faraday cage will protect devices from an EMP... Theoretically, can you run a ground strap to your car body and use the metal body panels / structure as a faraday cage for all the electronic goodies inside?
In other words, use the body of the vehicle itself as the faraday cage to protect the ECM, wiring, electronics, etc.
In other words, use the body of the vehicle itself as the faraday cage to protect the ECM, wiring, electronics, etc.
jordanmills
TGT Addict
Yes, but where would you ground it? A ground rod needs significant contact with dirt - most are buried four to eight feet. A metal strap dragging on concrete would work more as an antenna than as a ground. On the other hand, a metal enclosure, even a partial enclosure, would guide most of an EM wave around it instead of through it (depending on some topological factors).
Yep; that's what I'm talking about... Thinking along the lines of a good RF ground for radio; have an 8 foot ground rod along the edge of the driveway and use a length of braided strap to bond the body of the car to earth ground. I already have the body panels, exhaust, etc on my vehicle "RF bonded" pretty well for mobile HF communications so it would be basically connecting my mobile faraday cage to earth ground...
Just a crazy thought...
Way back in the day I would do a little HF on 11m at slightly higher than allowed ERP (I think the, uh, antenna tuner after the radio might have been miscalibrated). Key the mic and it'd light up the lamp in the button for the rear window defroster due to induced voltage (102" was on the back of the car). My parlor trick was to light a 4 foot florescent bulb held in my hand. Watching TV's in houses go bonkers was fun too. Having a bank teller run outside and ask me to shut up because keying the radio was rebooting their computers. All kinds of interesting things, but the car itself never one hiccuped.
I had a slightly adjusted output on my CB radio too. I would pull into a closed gas station with my 74 Impala and touched the whip to the fluorescent bulbs, it would light them up.
Haha, yep! I used to have a Magnum export radio in my old truck for a while... But then I got my ham ticket and decided I better go "legit" and sold it in the parking lot of the local truck stop!
Still have my 102" whip stashed in the garage too...
Still have my 102" whip stashed in the garage too...
Raytheon has a device in development that uses directed energy to disable vehicle ECU’s and drones in situations like a vehicle of drone delivered IED.
Aside from building some sort of Faraday cage around all of the electronic components or housing it like vmax described, it would be extremely difficult to shield solid state electronics. All it would take to fry a shielded component is one unshielded wired that’s exposed and has continuity to the shielded components. When EMP energy hits that wire it’s going to absorb energy thru inductance or function as a wave guide and deliver the energy to the components.
The question is whether the energy would be attenuated sufficiently to prevent catastrophic failure of the components.
Aside from building some sort of Faraday cage around all of the electronic components or housing it like vmax described, it would be extremely difficult to shield solid state electronics. All it would take to fry a shielded component is one unshielded wired that’s exposed and has continuity to the shielded components. When EMP energy hits that wire it’s going to absorb energy thru inductance or function as a wave guide and deliver the energy to the components.
The question is whether the energy would be attenuated sufficiently to prevent catastrophic failure of the components.
jordanmills
TGT Addict
If you're talking about a stationary vehicle, that would be pretty easy and pretty reliable.Yep; that's what I'm talking about... Thinking along the lines of a good RF ground for radio; have an 8 foot ground rod along the edge of the driveway and use a length of braided strap to bond the body of the car to earth ground. I already have the body panels, exhaust, etc on my vehicle "RF bonded" pretty well for mobile HF communications so it would be basically connecting my mobile faraday cage to earth ground...
Just a crazy thought...
I just got my ticket, but don't have the gear (or knowledge, really) to transmit on HF. I can make some TVs go wild with UHF though!
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