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Surface Forces: Electromagnetic Armor
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August 14, 2007: For several years, up until 2003, the U.S. Navy mentioned  electromagnetic armor, or DAPS (Dynamic Armor Protection System) being developed for the planned CVN-21 class of carriers. The basic technology behind DAPS was not complex. Areas above the waterline would have two layers of thin armor, separated by a small air space. The two layers of armor would be electrified, and when the armor was hit by a shaped charge (favored for cruise missile warheads) the jet of superhot plasma, formed by the shaped charge warhead going off, would be broken up by the electromagnetic field formed when the two layers of armor were forced together. The big problem with DAPS was the huge amount of electricity required when the system was turned on.  However, in the next decade or so, warship power plants are expected catch up with the needs of DAPS systems.

 

DAPS is also being developed for armored vehicles, and enough power can be generated by these vehicles to support a system that protects against small shaped charges, such as an RPG, or other small rocket. More power, than current vehicles generate, would be needed to protect against the larger shaped charge warheads of ATGMs (anti-tank guided missiles.)

 

 

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gf0012-aust       8/14/2007 6:00:51 AM
 
DAPS is more than sheathed charge management
 
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Nichevo       8/14/2007 9:05:38 AM
Brilliant as usual GF...however...

to what effect will the sheathed charge effect, regarding only that, be effective when it is practically cliché that most antiship missile damage is not done by the warhead, let alone any Munroe effect thereof (which I assume is they key issue wrt sheathed charge effect), but by the KE of the missile plus the burning fuel?

If the big threat to CVN-21 were RPGs or IEDs it would seem to sound better.

 
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Mike From Brielle       8/14/2007 10:33:45 AM
Instead of Air they should use that Armored glass as a dialectric that stops RPG's and EFP's but then why use the charged plates?  The presance of a capacitive charged plates does also, I imagine, pose some questions in regard to grounding, bounding, and antenna apertures.  
 
What I would imagine would be some kind of sandwich of two conductive plates around the armored glass with a second layer of armored glass then a more robust mattalic armor for plain old bullets.  This would / might be heavy and you would have electromagnetic issues. 
 
Whats so bad about cage Armor, maybe they can come up with an extensible version that only comes out / becomes extended  when you think you need it?   Maybe it could be made of aluminum so its light and like a picatinny rail there may be all sorts of other things you can stick on it.  Just a thought
 
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Herald1234       8/14/2007 11:27:31 AM
You need the gas void to make the molten jet dissipation effect work.
 
Herald
 
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Mike From Brielle       8/14/2007 11:55:33 AM
Short Reply:  Your probably right.
 
Long saving face reply:  Wouldn't the presance of an magnetic field alligned parrallel to the face of the opposing conductive plates compliment the tendency of the armored glass to"mushroom" the molten jet?   
 
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Herald1234       8/14/2007 12:05:17 PM
I don't know. Give me a few minutes to find out.
 
Herald  
 
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Nanheyangrouchuan       8/14/2007 12:33:37 PM
What is this about two nuclear reactors not being able to generate enough electricity?
 
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Herald1234       8/14/2007 12:52:03 PM
Herald1234       8/14/2007 11:27:31 AM
You need the gas void to make the molten jet dissipation effect work.
 
Herald
 
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Mike From Brielle       8/14/2007 11:55:33 AM
Short Reply:  Your probably right.
 
Long saving face reply:  Wouldn't the presence of an magnetic field aligned parallel to the face of the opposing conductive plates compliment the tendency of the armored glass to"mushroom" the molten jet?   
 
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Herald1234       8/14/2007 12:05:17 PM
I don't know. Give me a few minutes to find out.
 
Herald  

Well the best information I can find suggests that you want nothing physically dense to act as a physical constriction and channeling path when you deform the molten jet with either a magnetic field or a physical interrupter.
 
So while I think a glass liner would splash the jet it probably is best to have a gas void standoff to let the capacitor discharge do its thing.
 
Herald
 
 
 
 
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Mike From Brielle       8/14/2007 1:58:06 PM
Thank you for your attention to detail
 
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Lawman       8/15/2007 3:12:41 PM
How about a simple lamination, with reinforced glass, polystyrene, and then another layer of glass. The idea is that the reinforced glass should break up the incoming blast, with the polystyrene allowing it to dissipate, while still slowing it, and the final layer of glass further breaks up the blast. Use multiple layers, and you have a very very strong armour, capable of stopping a lot, without being ridiculously heavy.
 
The alternative would of course be a carbon fibre composite, which can be incredibly strong for its weight and volume. Ideally, a lucite block filled with carbon  Buckyballs, which have great properties for armour, and as a blast enters the medium, it would be slowed by the buckyballs, each bouncing against each other, distributing the incoming jet. A layer of reinforced glass at each side would help break up the jet, helping it to disperse. The best thing would of course be to then have 'exits' for the blast, so that it has somewhere to go once its slowed down - if you can redirect the blast downwards or upwards, it can travel between the armour and the hull.  
 
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