MBT armour - active and passive. Cross-sections and descriptions.

Discussion in 'Land Forces' started by militarysta, Oct 20, 2014.

  1. militarysta

    militarysta Defence Professionals Defence Professionals

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    I would like to start a new topic about MBT -this time exclusive ONLY about tank armour.
    It shoud help whit armour estimatous and will simplify the searching for informations.

    First:
    T-72M1

    Turret armour:
    [​IMG]
    As we can see- protection is circa 410-420mm RHA vs APFSDS and 500-520mm vs HEAT.

    and here Meppen tests photos - as we can see kwarz "special armour" is mounted during casting by sevral rods - they are visible as damages in red circles on photo:
    [​IMG]



    hull armour - here on PT-91 (so whit polish ERA ERAWA-2, orginally tehre is no ERA on T-72M1 hull)

    [​IMG]


    For 90. cut-viev we have:

    16mm HHS steel aditional external plate
    60mm RHA
    105mm STEF (glastextolite)
    50mm RHA.

    So for LOS (22 or 68. degree) we have:
    42mm HHS + 160mm RHA + 280mm STEF + 146mm RHA
    so protection is circa 460mm RHA vs APFSDS and circa 550mm vs HEAT

    BTW: the same armour have indian T-72M1 Aleya.

    BTW2: (STEF as 0.4 vs KE and 0.77 vs HEAT)
     
    Last edited: Oct 20, 2014
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  3. militarysta

    militarysta Defence Professionals Defence Professionals

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    Next -T-80UD (Ob.478B) hull armour from 1991.
    First picture is taken from otvaga2000 forum and not included external HHS plate and gap for ERA, second is taken from south korean PzF-3IT presentation but values are mark by myself on base facotry draws (for some resons I can't post those draws here -sorry).

    otvaga
    [​IMG]

    South Korea PzF-3IT presentation
    [​IMG]

    Hull (values for 0.)
    66mm RHA
    gap for ERA
    135mm RHA
    80mm ceramics
    135mm HHS
    gap whit some frame
    80mm ceramics
    135mm RHA.

    for LOS whole layout is strong as:


    T-80UD hull:
    vs APFSDS: ~630-640mm RHA (plus ERA)
    vs HEAT: ~730mm RHA (plus ERA)


    T-80UD turret have diffrent layout - I can't post factory draw, but I can describe layout:

    perpendicular to the surface:
    98mm cast + 30mm air gap (and some frame) + 25mm SHS, + 40mm ceramics + 25mm SHS, + 40mm ceramics + 50mm RHA + 50mm HHS + 190mm cast

    for LOS whole layout is strong as:
    APFSDS: 480-490mm
    HEAT: ~540mm

    This is for LOS equal to 550mm but for 0. angle LOS is circa 700mm and whole numbers incarese a lot:

    T-80UD turret for 0.
    APFSDS: ~620mm
    HEAT: ~700mm

    plus ERAof course


    ps. values taken as:
    APFSDS/HEAT
    HHS: 1.15 i 1.15
    ceramics: 0.9 i 1.5
    RHA: 1 i 1
    cast: 0.9 i 0.9
     
    Last edited: Oct 20, 2014
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  4. militarysta

    militarysta Defence Professionals Defence Professionals

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    T-64B (Ob. 447A) hull and turret

    T-64B turret so cast steel turret whit special armour consist of corund balls attatched in spatial grid structure -on this gird "cros-setions" they aremounted those corund balls, and whole "special armour" is melt by alumina or other light mettals:

    [​IMG]

    Sucht layout shoud achive protection as 360-450mm RHA vs APFSDS and 550mm vs HEAT, but on A. tarasenko webpage there are given values 420-450mm RHA vs APFSDS.

    BTW: turret LOS thickness for all 3 soviet tanks in first half of the 1980s where simmilar:
    T-72A: 470-530mm
    T-64B: 470-630mm
    T-80B: 530-600mm? (muszę pomierzyć)


    and T-64B hull:

    [​IMG]
    (STEF as 0.4 vs HE and 0.77 vs HEAT)

    vs APDSDS
    ~430mm RHA (up to 440mm)

    vs HEAT
    ~ 510mm RHA

    +ERA of course

    diffrent real photos of the same armour hull T-64B and BW layout:
    so: 60mm RHA + 35mm STEF + 30mm RHA + 35mm STEF + 45mm RHA.

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
    Last edited: Oct 20, 2014
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  5. militarysta

    militarysta Defence Professionals Defence Professionals

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    T-80U (1986) turret armour:

    [​IMG]


    hull:
    (draw made by Wiedzmin from otvaga2000)

    [​IMG]
    T-80U:
    25mm +gap for ERA + 50mm RHA + 35mm STEF +50mm HHS +35mm STEF +50mm RHA

    for 68. degree LOS
    66mm + gap for ERA+ 133mm RHA + 93mm STEF + 133mm HHS + 93mm STEF + 133mm RHA

    So protection (without ERA):
    vs KE: 66mm+ 133mm + 37mm + 146mm + 37mm + 133mm = 550mm vs APFSDS
    vs CE: 66mm+ 133mm + 71mm + 146mm + 71mm + 133mm = 620mm vs HEAT (SC)
    And turret shoud have simmilar protection for 0.

    Of course valus abouve are without ERA armour. Accoding to NII Stali data Kontakt-5 in new version from T-72B model 1989 give adtitional avarage protection as:
    +120mm RHA against APFSDS like M829
    +500-600mm RHA agianst RPG and ATGMS.

    If we added sucht values whe have protection circa 670mm vs KE and circa 1120-1220mm vs HEAT -what is very huge number...
     
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  6. militarysta

    militarysta Defence Professionals Defence Professionals

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    T-80B turret and hull armour

    agian - great job made by Wiedzmin from otvaga forum:

    [​IMG]
    hull:
    90.
    50mm RHA + 35mm STEF +50mm RHA +35mm STEF +50mm RHA

    for 68. angle (LOS):
    133mm RHA + 93mm STEF + 133mm RHA + 93mm STEF + 133mm RHA

    so T-80B hull protection is:
    vs APFSDS: ~470mm RHA
    vs HEAT: ~540mm RHA (plus Kontakt-1)



    Turret:

    turret for 30.:
    191mm cast + 122mm "kwarz" + 218mm cast so:
    ~370mm RHA + 122mm kwarz "insert"

    And per analogy to the T-72M1 turret protection and it "sand bars" or rather "kwarz insert" we can describe that kwarz "insert" is like:
    0,38 vs KE and 1.07 vs CE -so nice values, but kwarz weight a lot.
    So for 30. T-72B turret have protection like:
    316mm vs APFSDS
    500mm vs HEAT

    but for 0. degree we have:
    137-237mm cast + circa 170mm "kwarz" + 260mm cast
    So:

    T-80B turret protection for 0.:
    420-510mm RHA vs APFSDS
    540-630mm RHA vs HEAT
     
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  7. militarysta

    militarysta Defence Professionals Defence Professionals

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    Diffrent example of the passive armour: known from PzH2000 and SPz Puma "coniferous" armour - so mix ceramis and special small elastic bars able to disturb forming cumulative jet from subamunition. Simple and very effective:

    [​IMG]
     
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  8. militarysta

    militarysta Defence Professionals Defence Professionals

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    And here next type of passive armour - the cage armour:

    [​IMG]

    [​IMG]

    [​IMG]

    Effectivnes af sucht armour is ussaly 50/50. So if ignitor hit bar then RPG will explode and SC jest will be formed properly and penetrate main armour. If ignitor hit BETWEEN rod (cages) then cumulative warhed will be seriously damage between sucht rods and cumulative jest will not be formed properly or even warhed will not be ignited at all.

    In summary after read dozens pdfs about this I can describe effectivnes against "typical RPG granade" in case sevral types of cage armour:

    1) "normal cage armour" 40-50% effectivens
    2) polish light WITU cage armour - 60% effectivens
    3) LASSO RUAG - 60-65% effectivnes
    4) RPG-net - more then 65% effectivnes(!) and ultralight build.


    RPG-net:
    [​IMG]
    in RPG net sucht small metal bars on cros-setcions are do the same job as typical "heavy" cage on typical "cage armour"

    sevral god pdf:
    http://yadda.icm.edu.pl/yadda/element/b ... -0030-0008

    http://www.procax.org.pl/pliki/Mechanik_17.pdf
     
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  9. militarysta

    militarysta Defence Professionals Defence Professionals

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    Rare - prototype of the T-80UD hull armour from circa 1985-1986.
    Finnaly composition was diffrent. I post it here as intresting found "never exist in serial tank" solution :)

    [​IMG]
     
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  10. militarysta

    militarysta Defence Professionals Defence Professionals

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    And T-55AM Merida main and additional armour

    Main armour:
    [​IMG]

    and BDD armour:

    hull:
    [​IMG]

    turret:
    [​IMG]

    [​IMG]

    BDD effectivnes:

    So turret front: 210-230mm cast steel +BDD
    and hull front: 250mm cast + BDD

    if we take cast as 0.9 RHA and BDD effectivnes then whole protetion of the T-55AM will be as:
    for turret: 190-207mm RHA + 120 = 310-~330mm vs APDS (APFSDS??)
    hull 225mm RHA + 200-250 = 425-475mm vs HEAT


    source:
    http://www.jedsite.info/editors/james-warford_files/bdd-article-armor.pdf





    ======================
    Chieftian Stilbrew:

    [​IMG]

    [​IMG]


    [​IMG]

    [​IMG]
     
    Last edited: Oct 20, 2014
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  11. militarysta

    militarysta Defence Professionals Defence Professionals

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    erly T-64B hull armour

    [​IMG]

    80mm RHA - 105mm STEF (glas textolite)- 20mm RHA.
     
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  12. militarysta

    militarysta Defence Professionals Defence Professionals

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    Interesting found by Wiedzmin from otvaga forum.

    Photo from first chechenia war:

    [​IMG]
    In Wiedzmin opinnion it's propably T-72A hull whit unkown hull armour layout.
    This tank was from circa 1984/1985

    And this hull armour layout in closer:
    [​IMG]


    IMHO: diffrent NERA armour inside T-72B or T-72B model 1989
     
    Last edited: Oct 21, 2014
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  13. militarysta

    militarysta Defence Professionals Defence Professionals

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    Polish PT-91 hull armour in tank factory ;-)

    [​IMG]

    [​IMG]

    [​IMG]
     
  14. militarysta

    militarysta Defence Professionals Defence Professionals

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    Polish Leopard-2A5 aditional NxRA armour -those famous "wedges armour".

    Very rare and interesting photos ;-)
    [​IMG]

    [​IMG]

    [​IMG]


    zoomed internal lyout:
    [​IMG]

    and special "cracks" to limiteted NxRA armour after hit:
    [​IMG]

    NxRA pannels on Strv.122 hull front:
    [​IMG]


    And two pdfs from germany whit explanation how it's works:
    [​IMG]

    [​IMG]
     
  15. militarysta

    militarysta Defence Professionals Defence Professionals

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    NERA /NxRA armour

    http://www.google.pl/url?sa=t&rct=j&q=& ... GU&cad=rja

    So double NxRA (quite simmilar in layout to leo-2A5 "wedges armour") was able to reduce perforation level single SC warhed (diameter 136mm) from 950mm RHA to only
    15 and 81mm - those values should be describe as extremly good.
     
  16. militarysta

    militarysta Defence Professionals Defence Professionals

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    And here some simple polish NERA armour as ad-on modules for BRDM-2 and other vehicles:

    [​IMG]
    [​IMG]


    and tests results:

    [​IMG]

    [​IMG]

    [​IMG]

    well those ad on NERA modules are able to stop RPG PG-7M so it's not super hight-tech.
    Propably that's the reson why this solution wasn't bought by Polish Army...


    for end small descripsion in polish about those NERA modules:

     
  17. militarysta

    militarysta Defence Professionals Defence Professionals

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    Swedish NERA trials:

    http://www.mater.upm.es/isb2007/Proceed ... 29TB60.pdf

    Add-on armour______________Penetration depth in base armour [mm]
    No panels _________________________410mm
    A single NERA-panel _________________70mm
    Two parallel NERA___________________60mm
    Two CWO- NERA____________________40mm

     
  18. militarysta

    militarysta Defence Professionals Defence Professionals

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    And here T-55 Enigma simple NERA armour (the Haji armour)

    [​IMG]

    [​IMG]

    more or less very simple NERA whit single "NERA plate" layout:
    10,3mm aluminia + 4mm rubber + 4.3mm RHA + 24,5mm space
     
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  19. militarysta

    militarysta Defence Professionals Defence Professionals

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    Merkava Mk.3D Dor Dalet special armour:
    [​IMG]


    And - Merkava Mk.3 "citadele" of the turret and older ones modules:

    turret base (or "citadele") so 50-100mm RHA and in some part cast:
    [​IMG]

    [​IMG]

    [​IMG]

    fixed points for armour modules:

    [​IMG]

    [​IMG]

    turret sides armour module - not specialy thick -circa 30-35cm (so simmilar like in Leo-2,. M1, etc)

    [​IMG]

    [​IMG]
     
  20. militarysta

    militarysta Defence Professionals Defence Professionals

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    IBD armour module able to stop Pzf-3IT600 warhed

    [​IMG]

    this module (circa 600mm thick?) was bale to stop SC whit perforation bigger then 800mm RHA (+ precursor)
     
  21. militarysta

    militarysta Defence Professionals Defence Professionals

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    Again marvelous job by wiedzmin from otvaga2000.ru:

    [​IMG]

    6 armour generation in "T-72" ;-)

    valuse given perpendicular to th hull surface (so it's not LOS vaue)

    1973 T-72 Ural
    80mm RHA + 105mm STEF + 20mm RHA

    1976
    60mm RHA + 105mm STEF + 50mm RHA

    1982-1984 T-72A/M1
    16mm HHS + 60mm RHA + 105mm STEF + 50mm RHA

    1984 T-72B wariant I
    60mm RHA +15mm air gap + 15mm RHA/HHS +15mm air gap + 15mm RHA/HHS + 15mm air gap + 15mm RHA/HHS + 15mm air gap + 50mm RHA


    1985-1987 T-72B wariant II
    60mm RHA + 10mm air gap + 10mm HHS + 10mm air gap + 10mm HHS + 10mm air gap + 20mm RHA + 10mm air gap + 20mm RHA + 10mm air gap + 50mm RHA


    1989 T-72B model 1989
    60mm RHA +5mm rubber +3mm HHS +19mm air gap +3mm RHA + 5mm rubber +60mm HHS +10mm anti-radiation layer +50mm RHA
     
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