Renegade334 Posted March 29, 2018 Report Share Posted March 29, 2018 What about resilience to HEAT jets? Do the air bubbles help with that or is the mitigation negligible? Quote Link to comment Share on other sites More sharing options...
Toxn Posted March 29, 2018 Report Share Posted March 29, 2018 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. Quote Link to comment Share on other sites More sharing options...
Xlucine Posted March 29, 2018 Report Share Posted March 29, 2018 Metal foam should just act like a whipple shield against HEAT (i.e. probably quite good against the jet tip) Quote Link to comment Share on other sites More sharing options...
Collimatrix Posted March 29, 2018 Author Report Share Posted March 29, 2018 Interesting. Then it might be a decent under-layer to ERA, since ERA usually leaves the jet tip completely unmolested: Quote Link to comment Share on other sites More sharing options...
Bronezhilet Posted March 30, 2018 Report Share Posted March 30, 2018 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: If the shockwave doesn't/can't reflect back to the jet it won't slow it down. Quote Link to comment Share on other sites More sharing options...
SH_MM Posted May 22, 2018 Report Share Posted May 22, 2018 NERA & ERA from South-Africa 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: 105mm KE Mk 3 – 530mm pen 120mm KEW – ± 600mm pen 120mm F1 KE – ± 640 mm pen 180mm HEAT warhead – 1300mm pen TOW II HEAT warhead 1000 mm pen 53/145mm tandem HEAT warhead – 1100mm pen Ingwe ATGM being tested against armor Laviduce, Mighty_Zuk, That_Baka and 4 others 7 Quote Link to comment Share on other sites More sharing options...
grabie Posted February 4, 2019 Report Share Posted February 4, 2019 My first post, hope it´s not a "re" one: http://defensepoliticsasia.com/nera-understanding-non-explosive-reactive-armour/ Domus Acipenseris 1 Quote Link to comment Share on other sites More sharing options...
Zadlo Posted October 3, 2019 Report Share Posted October 3, 2019 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. 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 Source: https://www.docdroid.net/YBkruhn/6wilk-badania-skutecznosci-obronnej.pdf Beer 1 Quote Link to comment Share on other sites More sharing options...
Zadlo Posted October 28, 2019 Report Share Posted October 28, 2019 How DU works as an armor https://docdro.id/gFliFU4 Quote Link to comment Share on other sites More sharing options...
Kal Posted October 28, 2019 Report Share Posted October 28, 2019 2 hours ago, Zadlo said: How DU works as an armor https://docdro.id/gFliFU4 I don't think that represents how tanks would use DU as an armour. Thats more academic level study. Quote Link to comment Share on other sites More sharing options...
Lord_James Posted October 29, 2019 Report Share Posted October 29, 2019 14 hours ago, Zadlo said: How DU works as an armor https://docdro.id/gFliFU4 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. Quote Link to comment Share on other sites More sharing options...
Zadlo Posted February 27, 2020 Report Share Posted February 27, 2020 @Wiedzmin, do you know anything about ceramic material (corundum) called B-6 which is in armor arrays used by Russian vehicles? Quote Link to comment Share on other sites More sharing options...
Wiedzmin Posted February 28, 2020 Report Share Posted February 28, 2020 9 hours ago, Zadlo said: @Wiedzminarmor arrays used by Russian vehicles? such as ? Quote Link to comment Share on other sites More sharing options...
Zadlo Posted February 28, 2020 Report Share Posted February 28, 2020 Typhoon, Medved, BMD-4, BTR-80/82, Boomerang - as an add-on armor. Quote Link to comment Share on other sites More sharing options...
Wiedzmin Posted February 28, 2020 Report Share Posted February 28, 2020 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 Quote Link to comment Share on other sites More sharing options...
Militarysta Posted February 29, 2020 Report Share Posted February 29, 2020 Meybe this is answer: https://imgur.com/werifyQ https://imgur.com/ZSbxH61 https://imgur.com/Qcz1sKq Zadlo and Beer 2 Quote Link to comment Share on other sites More sharing options...
Bronezhilet Posted March 2, 2020 Report Share Posted March 2, 2020 Looks like LIBA from TenCate Quote Link to comment Share on other sites More sharing options...
Zadlo Posted May 4, 2020 Report Share Posted May 4, 2020 Performance of several aluminium alloys against .30-06 and .50 projectiles - chart is based on several US standards (MIL-DTLs) and experimental tests made by USARL. * E(V) - TE, E(m) - ME Quote Link to comment Share on other sites More sharing options...
sksslrkalqek Posted September 12, 2020 Report Share Posted September 12, 2020 There seems to be a difference between Bustle and Crew Area's Side Armor in Abrams Turret. protection difference Bustle Side : 90°, CE 380mm Crew Area Side : 45°, CE 380mm Plate thickness difference Bustle Side : 6.35mm (¼ inch) Crew Area Side : 19.05mm (¾ inch) "Bustle Side" exposed layout of bustle side armor crew area side armor layout Quote Link to comment Share on other sites More sharing options...
FORMATOSE Posted December 6, 2020 Report Share Posted December 6, 2020 The AMX-40 was the first French MBT to feature NERA (a.k.a PAC in French ; shock-accelerated plates) : Serge, Laviduce and Collimatrix 3 Quote Link to comment Share on other sites More sharing options...
Wiedzmin Posted December 18, 2020 Report Share Posted December 18, 2020 1974 report Beer, Molota_477, Bronezhilet and 4 others 7 Quote Link to comment Share on other sites More sharing options...
SH_MM Posted December 18, 2020 Report Share Posted December 18, 2020 Maybe I am misunderstanding the drawings, but there was only one NERA target and two ERA targets, the rest was just spaced steel? Quote Link to comment Share on other sites More sharing options...
Zadlo Posted December 18, 2020 Report Share Posted December 18, 2020 If composite armour with glass textolite filler can be named NERA Basically these drawings are too old to contain NERA in it. Quote Link to comment Share on other sites More sharing options...
SH_MM Posted December 18, 2020 Report Share Posted December 18, 2020 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? Quote Link to comment Share on other sites More sharing options...
Lord_James Posted December 19, 2020 Report Share Posted December 19, 2020 Thanks for the drawings, but could you put some of them in a spoiler next time? Quote Link to comment Share on other sites More sharing options...
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