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  1. #11
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    You might like to see the sketch of its operation done by Millis Jefferis and the drawing office version. The JW Mk II was about 6 feet long.


    JW Operation Sketch by MJ.jpg


    SK11426 JW Operation Dwg (4-7-42) cropped2.jpg
    Last edited by Bonnex; 2nd August 2015 at 07:58 PM.
    N.


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    millsbomber (6th November 2016), Sir Roger (24th August 2018), switch (2nd August 2015)

  3. #12
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    Dreamk,

    The fuze, which incorporated a 'self destruct' function was plumbed into the gas circuit. When the gas supply was exhausted or tampered with, the self destruct function would operate. However, it was envisaged that a bomb with an all but exhausted gas supply would sink to the bottom but any attempt to bring it to shore would result in the fuze operating.

    TimG

    P.S. I'll try and calculate the dimensions for you.

    anotate22.pdfjw.pdfjwiso.pdf
    Last edited by TimG; 3rd August 2015 at 07:51 PM.

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  5. #13
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    Thanks TimG, If you can succeed to calculate the dimensions it will be great.

  6. #14
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    Hi,

    I have just visited the Tirpitz Museum at Kåfjord outside the city of Alta in Norway (http://tirpitz-museum.no). They have a Johnny Walker on display, as well as lots of photos and artifacts. I also managed to visit the Norwegian Home Front Museum(http://forsvaretsmuseer.no/Hjemmefrontmuseet). The museum is within the Akershus Fortress in Oslo. They have the nose of a Tall Boy that was used on the attack on the Tirpitz. Both museums were well worth the visits.

    1989RJB

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  8. #15
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    How did the Johnny Walker bomb get its name?

    robin bird

  9. #16
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    maybe it was full of whiskey!

  10. #17
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    Is that the short answer. I would 'still' like to know how Johnny Walker got its name.

  11. #18
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    Quote Originally Posted by kiwieod View Post
    maybe it was full of whiskey!
    I understand (from Macrae's book and from talks with Gordon Rodgers) that it got its name one evening in a pub in or around Whitchurch where they presumably found a supply of the whiskey so named.
    N.


  12. #19
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    Sounds good. Incidentally the Johnny Walker bombs were tested at RAF Helensburgh by the Marine Aircraft Experimental Establishment. The aircraft used was Sunderland DV967 G (Guard for all times). I have the logged details for these JW trials and further research into Sunderland DV967 has just put me on the tail of the infamous U Boat U-564. That is because DV967 was also used at Helensburgh for tail parachute trials to aid dive attacks on submarines. DV967 then joined 228 Squadron when it came across a group of submarines and singled out U-564. Flying Officer L.B. Lee swooped and straddled U-564 with depth charges. U-564 was badly damaged but AA fire ripped the Sunderland to shreds. It crashed into the sea killing the crew. U-564 was fatefully damaged and was sunk next day by another aircraft. I wonder if DV967 was still fitted with its tail parachute when it dived on U-564? We will probably never know.
    robin is researching the history of MAEE RAF Helensburgh where his late father served.

  13. #20
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    Here are some photos I took at the norwegian naval museum in Horten a few weeks back:
    Attached Images Attached Images

  14. The Following 11 Users Say Thank You to Natter For This Useful Post:

    1989rjb (16th September 2017), doppz92 (16th September 2017), Dreamk (16th September 2017), FZG76 (17th September 2017), MINENAZ16 (16th September 2017), peteblight (16th September 2017), sgdbdr (16th September 2017), Sir Roger (24th August 2018), Snufkin (16th September 2017), TimG (16th September 2017), Yodamaster (16th September 2017)

 

 
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