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  1. #1
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    26.12.2001
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    Default Mz-26 Explosive cutter, USSR, WW2

    MZ-26 Explosive cutter, USSR, WW2.

    Ever since minefield were laid, opposing forces have tried to clear these minefields.
    Because of this, anti-clearance or sweep onstructors where used by various navy’s as a countermeasure.

    The Russian navy deployed the 412 kg’s weighing MZ-26 explosive sweep obstructor, which was laid by surface aircraft in and around minefields with a maximum depth of 128 meters.
    The whole MZ26 is held in place on the seabed with an anchor.
    The MZ-26 sweep obstructor consists of a base element, or buoyancy chamber with 4 float housings on top, each housing contains one float, each float is connected to the buoyancy chamber with a mooring cable, the mooring cable is fitted with 2 MZ-26 explosive cutters.

    As soon as the obstructor is dropped and has reached depth, hydrostatic pressure releases an arming lever that also unlocks a release lever.
    At the same time, dissolution of a soluble plug releases one of the floats which rises to the limit of it’s mooring cable.

    Explosive cutter:

    The mooringcable is fitted with 2 Mz-26 explosive cutters, each explosive cutter contains a hydrostatic plunger that restraints a release lever, upon reaching depth, water pressure pushes the plunger inward, thus freeing the release lever.
    When a sweep wire moves against the cable and slides along it, it pushes against the firing bail, unseating the bail from it’s position in the hook of the release lever.
    The release lever is pushed outwards, freeing the crosshead.
    This permits direct pressure of the sweep wire onto the obstructor’s charge container.
    The container with mounted firing pins is pushed against the crosshead , the firing pins strike the detonators firing the charge, cutting the sweep wire.
    When the charge detonates, it also cut’s the floats mooring cabel, the sudden drop in tension on the cable releases the next float (also fitted with 2 explosive cutters), thus replacing the lost float.

    This process is repeated until all floats are used.

    Depicted below is an original MZ-26 explosive cutter, produced in 1937.
    (I still have to find a piece of cable, until then, a piece of rope will have to do.)


    Source:
    Mine Disposal Handbook, part VII
    M.Dv. 454: Anleitung zum Bergen und Entschaerfen Deutscher und fremder Sperrwaffen. 1942
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    Zünder





    Suche ständig Versuchs-, Röchling- und Treibspiegelgranaten, Einzelteile sowie Information.

  2. #2
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    Default

    ...
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    Last edited by zünder; 28.08.2010 at 20:19.
    Zünder





    Suche ständig Versuchs-, Röchling- und Treibspiegelgranaten, Einzelteile sowie Information.

  3. #3
    Join Date
    24.05.2003
    Location
    Holland
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    2,841

    Default

    A very interesting item, of which I did not even know it existed. Thanks for posting and learning me something completely new.
    You wanna make a piece of ammo look interesting? .......cut it!

    Looking for / Suche noch:
    -8,8cm Pzgr.40.

  4. #4
    Join Date
    08.05.2003
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    4,636

    Default

    DJ, check the US "Mine Disposal Handbook".

    Ich suche Wissen!

    SCIENTIA POTENTIA EST!

    Wer nichts weiß muss alles glauben!

    Und wer toleriert uns?

    Studiert den Hooton-Plan, den Kaufman-Plan und den Morgenthau-Plan!

    Ich bin verantwortlich für das was ich sage, nicht dafür was jemand anders versteht!

    https://www.youtube.com/watch?v=1UkmhtoXCPA
    https://www.youtube.com/watch?v=_aw9aRyjLcI

  5. #5
    Join Date
    26.12.2001
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    Default

    @DJ: glad to return the favour for once.

    @X: i allready showed that picture in my post.
    Zünder





    Suche ständig Versuchs-, Röchling- und Treibspiegelgranaten, Einzelteile sowie Information.

  6. #6
    Join Date
    08.05.2003
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    4,636

    Default

    Quote Originally Posted by zünder View Post

    @X: i allready showed that picture in my post.

    ...tired I am and see only half of everything...
    Ich suche Wissen!

    SCIENTIA POTENTIA EST!

    Wer nichts weiß muss alles glauben!

    Und wer toleriert uns?

    Studiert den Hooton-Plan, den Kaufman-Plan und den Morgenthau-Plan!

    Ich bin verantwortlich für das was ich sage, nicht dafür was jemand anders versteht!

    https://www.youtube.com/watch?v=1UkmhtoXCPA
    https://www.youtube.com/watch?v=_aw9aRyjLcI

  7. #7
    Join Date
    31.05.2006
    Location
    Roma
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    77

    Default

    The cutting charge (in Yugo service):

    Regards
    stecol
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  8. #8
    Join Date
    31.05.2006
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    Default

    Other markings:
    Attached Images Attached Images

  9. #9
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    26.12.2001
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    @Stecol: very interesting, thanks for showing.

    What do the markings mean exactly ?
    Zünder





    Suche ständig Versuchs-, Röchling- und Treibspiegelgranaten, Einzelteile sowie Information.

  10. #10
    Join Date
    31.05.2006
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    Roma
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    Default

    Hi zünder,

    Not completely sure, it is croatian, but the meaning is:

    T = TNT
    Minski Zaštitnik MZ-1 = Anti Mine Sweeping MZ-1
    Eksplozivni Rezač = Cutting charge
    MTARZ 67 01 = production plant, lot 1967 01

    Remont 1989 SKT = refit/repair in 1989 by SKT

    But the charge was probably produced in Russia during the WW2 as seen in the markings of second group of pictures.

    Regards
    stecol

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