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  1. #11
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    Hi Tim,
    I have looked at those species. But, watching the filmclips on the net a very strong fire had been raging there for some time, so the temperature, especially in the center, was very high. So any Dinitrogentetroxide would have been straight away disassociated into NO2. Now this species is a very strong oxidiser. To develop into a detonable cloud it had to mix with a lots of carbonaceous matter. Recently a US documentary was aired on TV here about the accident in a "Titan Missile Silo", where a spanner that fell down punctured the tank. The 2 component propellant is hypergolic. But, there the reaction developed to an explosion after some time, but not to such a huge detonation.Regards,
    Bellifortis.
    Quote Originally Posted by TimG View Post
    Bellifortis,

    Good spot (Texas), have a look at RFNA and Dinitrogen Tetroxide.

    TimG
    Last edited by Bellifortis; 6th August 2020 at 10:49 AM.

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    apfsds (9th August 2020)

  3. #12
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    I'm just trying to imagine the reaction of an EOD officer being called in and asked to deal with 2,750 tons of unstable AN....

    This reminds me a bit of the SS Richard Montgomery, a sunken transport ship in the Thames Estuary said to contain 1,400 tons of EO. It's been sitting there since WW2; every now and then people take a look at it, shake their heads and decide to leave well alone.

  4. #13
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    "Any live or recovered ordnance in my posts has been dealt with by trained EOD personnel"

    I've seen things you people wouldn't believe.
    Barbeques on fire by the chalets past the castle headland
    I watched the gift shops glitter in the darkness off the Newborough gate
    All these moments will be lost in time, like icecream on the beach
    Time for tea.

  5. The Following 8 Users Say Thank You to LCplCombat For This Useful Post:

    apfsds (10th August 2020), doppz92 (10th August 2020), HAZORD (9th August 2020), Millsman (10th August 2020), pysall (9th August 2020), Snufkin (9th August 2020), TimG (9th August 2020), wichitaslumlord (10th August 2020)

  6. #14
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    There doesn't seem much discussion about the multiple small explosions, prior to the big bang. Were they fireworks or SAA going off? One commentator said the docks were controlled by Hezbollah, who have a certain interest in explosives.
    Author of 'British Rifle Grenades of the Great War'

  7. #15
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    Quote Originally Posted by Tony Williams View Post
    I'm just trying to imagine the reaction of an EOD officer being called in and asked to deal with 2,750 tons of unstable AN....

    This reminds me a bit of the SS Richard Montgomery, a sunken transport ship in the Thames Estuary said to contain 1,400 tons of EO. It's been sitting there since WW2; every now and then people take a look at it, shake their heads and decide to leave well alone.
    Here's the list of what's on the SS Richard Montgomery.

    _______________________________________________

    The weights given in the table below are those of the
    explosive content of the cargo and not the shipped weight.
    LOCATION TYPE OF MUNITIONS EXPLOSIVE
    WEIGHTS (TONNES)


    HOLD NO1
    Deep tanks Aft
    79 cases signals 3 (pyrotechnics)
    1429 cases wp 100lb smoke bombs 65 (white phosphorus)
    Deep tanks Forward
    30 Boxes boosters 31 (pyrotechnics)
    786 boxes signals
    Lower hold/tween deck
    1407 500lb bombs TNT AN M64A1 167
    850 1000lb bombs TNT AN M65 208
    1500 250lb bombs TNT AN M57 84


    HOLD NO 2
    Lower hold
    1068 1000lb SAP bombs TNT AW-M59 140
    574 500lb SAP bombs AN M58 41
    286 2000lb GP TNT AN-M66 144
    588 1000lb AN M65 140
    Tween deck
    521-580 B260lb fragmentation bombs AN M81 9
    2297 cases of fragmentation bomb clusters 9
    AN M1A1 (6 x 20lb fused)
    and/or AN M4A1 (3 x 23lb unfused)
    and/or AN-M81 B260lb


    HOLD NO 3
    Lower hold/tween deck
    1170 SAP 1000lb bombs 163
    406 GP 1000lb bombs 99
    1351 SAP 500lb bombs 97

    TOTAL on board 1400 tonnes
    Author of 'British Rifle Grenades of the Great War'

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    doppz92 (16th August 2020)

  9. #16
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    Quote Originally Posted by Millsman View Post
    Here's the list of what's on the SS Richard Montgomery.

    TOTAL on board 1400 tonnes
    Thanks. So that's half the quantity of explosive of the Beirut blast (possibly more in equivalent terms, if TNT etc are a bit stronger than AN?).

    Has anyone plotted the blast zone on a map, showing the area of total destruction, partial destruction and minor damage? I presume that it would do severe damage to Sheerness and give Southend a bit of a shaking...?

  10. #17
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    I was told once that Southend would need to be totally re-glazed and would lose some older buildings. That was a long time ago though. I don't know if anyone updates these estimates.
    Author of 'British Rifle Grenades of the Great War'

  11. #18
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    Here is the 2000 Maritime and Coastguard Agency report on the wreck:

    https://assets.publishing.service.go...montgomery.pdf

    which contains the above mentioned table of existing cargo.

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    AMMOTECHXT (16th August 2020)

  13. #19
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    Thanks Tom

    My source was the DERA report.

    John
    Author of 'British Rifle Grenades of the Great War'

  14. #20
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    Does HE deteriorate and become less effective over time? Does being kept underwater affect this?

 

 
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