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Thread: 4000lb Cookie

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    Default 4000lb Cookie

    Hello Forumites
    In the 12 Sqn ORB, reference is made to “4000lb HCN Inst” to the bomb loading of
    a MkII Wellington. What did that HCN Inst mean?
    tia
    AndyWis

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    Default Re: 4000lb Cookie

    HC “High Capacity”
    I had always thought the “N” referred to “Nose” but now don’t believe that is correct.
    “Inst” refers to Instantaneous Fusing.

    My take.

    Jim

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    Default Re: 4000lb Cookie

    Hello, Jim
    my deduction exactly.
    Thanks for that
    Andy

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    Default Re: 4000lb Cookie

    We are on adjacent postings...MAEE RAF Helensburgh tested 4000 lb high capacity bombs but there is no reference to N in reports I have. Various casings and fuses were tested.

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    Default Re: 4000lb Cookie

    My reference to the HCN Inst bomb came fro 12 Sqn ORB Record of Events Aug 1942
    Andy

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    Default Re: 4000lb Cookie

    Quote Originally Posted by andy wis View Post
    Hello Forumites
    In the 12 Sqn ORB, reference is made to “4000lb HCN Inst” to the bomb loading of
    a MkII Wellington. What did that HCN Inst mean?
    tia
    AndyWis
    Andy,

    Would you mind giving us the precise reference you quoted in the 12 Sqn ORB - Year/Month/F540/1,Image No XX of XXX?

    Col.

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    Default Re: 4000lb Cookie

    High Capacity, nose-fused, instantaneous detonation sounds reasonable?

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    Default Re: 4000lb Cookie

    Hello, Col
    The references are:
    F541. 1942. August. 6/7th. A/C Z8656/E. Sgt Hart. Tgt Duisberg

    or: August. 9/10. A/C. W5399/G. F/S Francis. Tgt. Osnabruck

    Any good?
    Andy

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    Default Re: 4000lb Cookie

    Quote Originally Posted by ianh View Post
    High Capacity, nose-fused, instantaneous detonation sounds reasonable?
    Agreed. So I’ve come back to “Nose”. Still not certain.

    Jim

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    Default Re: 4000lb Cookie

    Dad carried 4000 lb cookies on 75% of his despatched operations, some aborted, some recalled. On most of these, the ORB records “4000 lb H.C.N.I.” Sometimes, the filling is recorded, “Amatol”, “Trinatol”, “TNT” or “Minol”. For Goch, it’s spelled out “HC Minol Nose Fused”.

    http://heritage.canadiana.ca/view/oo...2/1075?r=0&s=3

    I seem to recall dad related the cookie exploded in the air, to maximize the effect of removing the roofs to permit incendiaries to burn inside buildings. Edit:This would suggest some sort of barometric fusing, however, subsequent research indicates to me barometric fuses were highly unlikely and were primarily for Target Indicators and Flares.

    Jim
    Last edited by JDCAVE; 25th January 2022 at 18:24.

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