Posted on 04/17/2022 3:36:23 PM PDT by SpeedyInTexas
The first image of the guided missile cruiser Moskva of the Russian Navy that sank a few days ago, via @Bormanike.
Depending on the side you choose to believe, the ship was either hit by 2x R-360 "Neptun" ASMs, or suffered a catastrophic ammunition fire. You decide.
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The rise time, antenna length, and voltage deliver the current. The issue I have looked at closely is CME from the sun. The CME creates a magnetic field with a rise time of seconds so it requires very long lines and only affects the electric grid and other long wires. I point that out to people because they often conflate that with EMP which is an electric field with a very short rise time. The short rise time means a small antenna is sufficient, and many of those exist in their cell phone.
To get the power you need to know the current, but to get the current you need the antenna length, rise time and electric field (V/m). The lightning strike that fried my weather station on the roof years ago created an electric field (V/m). I further point out to the CME worriers that lightning arrestors in their local grid are tripped by high voltage with a rise time of about a microsecond. I have a grounded lightning arrestor here in the box on the wall in front of me attached to an antenna on the roof.
The rise time for EMP is about a nanosecond. The electric field can be 100's of kV/m. My lightning arrestor response time is about 10-20 ns which is too slow. It will do nothing anyway since the line on the protected side is too long. I don't know how any of my electronics will fair, I assume they will be fried since they are unprotected.
mind if I borrow this meme?
It was disheartening to me. Rust happens, always...but not fixing it and surrendering to it-that was new to me.
Hard to tell-it is possible that they were tearing up the non-skid or had removed paint and had not yet cleaned it up for priming and painting...I can see where they might chip off all the paint, then not come back and finish the job for weeks. Doesn’t take long for corrosion to set back in, so they would have to clean it again. Seems completely inefficient, but...I have never had much respect for what I have seen of the Soviet-er, Russian Navy in that respect.
Also, at the far left of that picture, the deck looks different, as if it already has a finish or paint on it.
In any case, I have sympathy for the individual crew, young men below flooding or fiery decks, but they are in a war of their own making, so that is as far as I will go.
I can imagine I will now be painted as Putin Stooge or an Unthinking Ukrainian Propaganda Eater. Could go either way.
But having been a young man on a warship one time, it isn’t hard for me to identify with a young man of any nation on a warship, never mind a burning, sinking warship.
Military equipment is tested at a facility located at Kirtland Air Force Base, New Mexico (among other places) and the actual power delivery of the EMP is measured in Amps/square meter.
Whether equipment or any circuitry is fried or not, depends on its design/shielding, often devices acting like Faraday cages.
An actual EMP will fry anything in its path unless it is "hardened" - which will include anything in your garage or your house. Don't even count on your toaster working again!
Doesn’t look like the pictures of the Moskva. Looks like a different ship altogether. But, I’m no expert.
It could be the camera angle, but it looks like rust struck the ship long before the missile.
The destroyer looked like crap.
an explanation on that tread was the ship was just coming back from a double deployment.
I can understand that but i was always under the assumption that next to fire control training etc that scraping and painting was always a high priority.
guess not..
someone here said the navy sub-contracts for that now?
LOL
That was me-what I heard. Hey, what sailor wouldn’t want to subcontract that work out? It is messy, noisy, and tedious.
And if you were on deployment for 12 straight months with very few port calls, I suppose it could get nasty depending on how far between port calls and where they are.
I also heard you can’t go on liberty alone anymore in a foreign port. Everything has to be organized.
Sad, if true. But I guess that is reality if it is.
Which is probably why you wrote "I don't know how any of my electronics will fair... when I'm sure you meant "how my electronics will fare.."
Also, self inductance in conductors is a very large factor when one is talking about a nanosecond. For example, current does not like to turn sharp corners rapidly. This will tend to limit peaks. "Lower the curve" so to speak, to where other protective measures in circuits ("fast" capacitors to ground, inline inductors, and such) can absorb incoming peaks.
Finally, closely spaced parallel incoming conductors will tend to act as balanced lines. That power cord to your TV, for example, is itself probably not a threat to efficiently pick up the EMP's field.
How all this works out is in the purview of RF engineers and such. That's not my area of specialty. But there may be other ways to evaluate this:
Has any major engineering association issued a dire warning backed by most engineers with practical experience & expertise in the field?
Has Pooty threatened an EMP or EMP's yet?
I love talking with those guys. Even when they can't say much, they say a lot.
Post of the day! You win, Still laughing.
Their navy has had a steel blue/red color scheme, where the main decks are that rust red color.
But if you want to know how much power actually makes it into the device you use this formula: https://www.ahsystems.com/EMC-formulas-equations/field-intensity-calculation.php to calculate field strength and then the radiated power is proportional to that.
I entered a zero dB antenna and 30,000 meters altitude. With a trillion Watts I got 182 V/m and 88 W/m2. That's with the impedance implied in the formula which will depend on the materials of the receiver and the frequency spectrum. That seems like enough to do a little damage, not a lot of damage.
Also see: http://www.futurescience.com/emp/E1-E2-E3.html. Given the type of pulse, e.g. E1, the electric field strength and power density are related and proportional: These 2 MEV gamma rays will normally produce an E1 pulse near ground level at moderately high latitudes that peaks at about 50,000 volts per meter. This is a peak power density of 6.6 megawatts per square meter.
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