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  1. #1
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    Johnny Walker Bomb

    Who has technical information about the (500 lb.) Johnny Walker Bomb.

    I have the info from the book "Bombs Gone, the development and use of British air-dropped weapons from 1912 to the present day". By W/C John A. MacBean and Maj. Arthur S. Hogben.

    These underwater "walking" bombs/mines has been used against the German Battleship Tirpitz on 15 september 1944.
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  2. #2
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    Antoon,

    I have quite a bit of info on the JW bomb, I just can't find it at the moment! Attached is a photo of one. Where was your photograph taken?

    Regards

    Tim.G.
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    Last edited by spotter; 15th January 2009 at 09:20 AM.

  3. #3
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    JW Bomb

    You will know from Arthur's book that MD1 produced the JW Bomb (in two marks). MD1 was headed up by a Royal Engineer officer Millis Jefferis (MJ). Attached is one of his sketches for the operation of the Oscilating Mine known as Johny Walker.

    Plumbing rather than ordnance!
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    N.


  4. #4
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    Very good Photo and sketch guys.

    My photo is taken in the Armed Forces Museum (Forsvarsmuseet) at Oslo, Norway.
    Parts of these bomb have been found by Norwegian EOD on the mountain slopes of the Kåfjord.

    Some info says that the ordnance that was used was named “400lb. JW Mk II Mine”. Is this correct, because other sources say 500 lb. And what was the official name?
    Last edited by Antoon; 17th January 2009 at 02:38 PM.

  5. #5
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    Antoon,

    The full description in the handbook is;

    "Bomb, H.E., Aircraft, J.W., 400lb. Mk.I"
    or short "J.W. Bomb"

    Although it weighed in at about 400lb the filling was 90lb Torpex.

    Do you know if there is a fuze with the specimen that has been recovered?

    Regards

    Tim.G.

  6. #6
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    Tim G.

    Thanks for the info.

    I do not know if they have recovered the fuze.

    What is the title of the Handbook you mentioned?


    Greetings - Antoon

  7. #7
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    Antoon

    "J.W. Bomb and Components - Advance Instructions for use"

    TimG

  8. #8
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    Tim, G.

    Love to see the book.

    Greetings - Antoon

  9. #9
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    TimG

    I have tried to PM you, but there is a log-jam in your box! I have been warned that mine is about to overflow, too! Regarding Antoon, I have been in contact with the Norwegian EOD some years ago, and was told that the bomb was nearly intact, and the fuze parts had been carefully taken apart and mounted on a display board in a small village museum near the site. Perhaps it has now been moved to the Armed Forces Museum? It seems damage occasioned by falling through trees had prevented it destroying itself-it was still hanging from a tree when a hunter had found it, and was in much better condition than the other two specimens shown in the books mentioned!

    Regards,

    Martin.

  10. #10
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    JW 3 (1).jpg

    A few details about its properties:
    At the entry in water, the parachute was discarded to drop and the bom,b sunk to a depth of 17 meters, before rising to just below the surface. If it hit something on the way it would would explode - if not, it would sink again to a depth to17 meters and rise up again, about 10 meters from the last point.
    This was possible due to compressed air being discharged from a container in the nose portion into a chamber in the aft portion. The bomb could do up to 100 such cycles. The speed of each cycke could be set to between 1 and 3 minutes, so that the bomb could actually seek a target during a period of 1.5 to 5 hours.
    If within that time it had not hit a target, after the last cycle it would sunk to the bottom and destroy itselself.

    Can someone add the dimensions (Length / diameter) of the JW bomb?
    Thanks
    Last edited by Dreamk; 2nd August 2015 at 04:32 PM.

  11. The Following 3 Users Say Thank You to Dreamk For This Useful Post:

    beihan62 (2nd August 2015), doppz92 (16th September 2017), Sprockets (23rd May 2018)

 

 
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