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Fucking NERA everywhere


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2 minutes ago, Renegade334 said:

What about resilience to HEAT jets? Do the air bubbles help with that or is the mitigation negligible?

If the foam is filled with something (fuel, maybe) then it could provide decent HEAT protection.

 

Against APFSDS it won't do much.

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9 hours ago, Xlucine said:

Metal foam should just act like a whipple shield against HEAT (i.e. probably quite good against the jet tip)

But isn't a HEAT jet quite different from something floating/flying around in space? Sure the speeds involved might be the same, but if you encounter something with the length of a precursor (~5 cm) in space, you're still royally fucked I think.

 

19 hours ago, Toxn said:

If the foam is filled with something (fuel, maybe) then it could provide decent HEAT protection.

 

Against APFSDS it won't do much.

For as far as I know diesel filled armour only works when it's confined:

f390ba35c6.png

 

If the shockwave doesn't/can't reflect back to the jet it won't slow it down.

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  • 1 month later...

NERA & ERA from South-Africa

 

HA.jpg

Quote

HEAVY AMOUR

  • Development of heavy amour systems primarily for application in Main battle tanks.
  • This configuration has up to date defeated the following threats:
  1. 105mm KE Mk 3 – 530mm pen
  2. 120mm KEW – ± 600mm pen
  3. 120mm F1 KE – ± 640 mm pen
  4. 180mm HEAT warhead – 1300mm pen
  5. TOW II HEAT warhead 1000 mm pen
  6. 53/145mm tandem HEAT warhead – 1100mm pen

 

alk-2.jpg

Ingwe ATGM being tested against armor

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  • 8 months later...
  • 7 months later...

I've found some interesting issue

 

People from Polish Institute of Organic Industry (IPO) have shown how important is front plate in protection against shaped charges. The liner loses the most of its energy in first 30% to 35% of its route in the armor. 

 

jaYL82M.png

 

And because of that the best is when the front plate is made of material which has the best protection against shaped charges and is as thick as it's possible.

In this case there were two arrays of metal (Ti-Al) composite tested. Both of them had the same weight but one version (V1) had thick (10mm) titanium layer on the face. The second one (V2) had this layer on the rear.

 

The research has shown that V1 has better mass (Em = 2.04) and thickness efficiency (Ev = 1.55) than V2 (Em = 1.4; Ev = 1.15) against shaped charges.

Composites alone had:

- V1 - Em = 4.26, Ev = 2.14

- V2 - Em = 2.84, Ev = 1.43

 

Y38PlVZ.png

 

Source: https://www.docdroid.net/YBkruhn/6wilk-badania-skutecznosci-obronnej.pdf

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14 hours ago, Zadlo said:

How DU works as an armor

https://docdro.id/gFliFU4

 

eSDCE5w.png


yeah, um, not really. For modern ammunition, and the velocities they impact at, DU (and tungsten and steel) all undergo adiabatic (constant mass) shearing; basically the forces are so great and happen so quickly, the material cannot plastically deform in any meaningful way, and simply disintegrates. This can be seen in still-frames of high velocity test KE penetrators impacting hard targets, and how both the ‘penetrator’ and ‘armor’ turn to a noticeable plume of dust at the impact point. It’s not so much penetration, or deformation, as it is atomization. 

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  • 3 months later...
9 hours ago, Zadlo said:

Typhoon, Medved, BMD-4, BTR-80/82, Boomerang - as an add-on armor.

i'm talking about "B6" maybe you confuse with "Br6" which is protection level ?

 

and no BMD-4, BTR-80 or anything else get any ceramic armour, only serial ceramic armour made in Russia what we have is for army bulletproof vests and Mi28 maybe

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  • 4 months later...

There seems to be a difference between Bustle and Crew Area's Side Armor in Abrams Turret.

 

 

  • protection difference

c4zSTfs.png

 

 

Bustle Side : 90°, CE 380mm

Crew Area Side : 45°, CE 380mm

 

 

 

  • Plate thickness difference

fyL5CtR.jpg

 

Bustle Side : 6.35mm (¼ inch)

Crew Area Side : 19.05mm (¾ inch) 

 

 

 

ZilEvpE.png

 

"Bustle Side"

 

 

 

enmDJeU.jpg

 

exposed layout of bustle side armor
 

 

 

X8y35ZT.jpg

 

crew area side armor layout
 

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  • 2 months later...
  • 2 weeks later...

Not every type of fiberglass is a textolite and not every fiberglass is the same. Fiber-reinforced plastics have shown the abiltiy to act as interlayer material for NERA sandwiches, just as pure glass. They are just not the most efficient materials.

 

Edit: never mind, it seems that some of the other armor arrays also contain NERA?

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