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Thread: 6in dead

  1. #1
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    6in dead

    Hello,
    What does mean DEAD WT on these shells ?
    Regards

    48975195433_5b651c59af_b.jpg48975927807_a20befa6d9_b.jpg
    Any Live or Dug ordnance shown by me has been disposed of by EOD personnel .

  2. #2
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    Dead weight? But I would have thought it should be followed by a weight.

  3. #3
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    The actual weight is marked on the far "side" of the shell, at the same height as the words Dead Weight.

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  5. #4
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    The photo was taken on the desk of HMS Caroline

    6IN.jpg
    Any Live or Dug ordnance shown by me has been disposed of by EOD personnel .

  6. #5
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    DEAD WT means that "the centre of gravity is where ever you are supporting the weighted load with no support from it"
    I hope that makes sense when translated back to French!
    Regards

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    MINENAZ16 (18th November 2019)

  8. #6
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    The dead weight of a shell was its actual weight, as measured on weighing scales.

    Up till around 1916, shells had a specified nominal weight, and dead weight limits of no more than +/- 0.1% of nominal. For example for the 6", nominal weight was 100lb, High dead weight limit was 100lb 1.5oz, Low dead weight limit was 99lb 14.5oz. The result of manufacturing tolerances, the differences in weight from shell to shell would affect the range when fired. The actual measured weight was marked on the shell as the dead weight, and weight corrections were included on the range tables.

    By 1918 actual weight was only marked on 12" and 15" shells, all others from 3.7" to 9.2" using a code of painted 1" diameter discs to denominate actual weight bands: 3 discs = above mean to +.5%; 2 discs = mean to -.5% (both inclusive); 1 disc = -.5% to -1%.

    It was planned to change the system again before the end of WWI, to have actual weight variations denoted by +3, +2 +1, 0, -1, -2, -3 units about mean weight. For 6" shell the "unit" was 1lb.

  9. The Following 8 Users Say Thank You to Snufkin For This Useful Post:

    Andysarmoury (18th November 2019), bdgreen (18th November 2019), Lostround (18th November 2019), millsbomber (18th November 2019), MINENAZ16 (18th November 2019), proditto (18th November 2019), pysall (18th November 2019), wichitaslumlord (19th November 2019)

  10. #7
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    These shells look like mockup
    Any Live or Dug ordnance shown by me has been disposed of by EOD personnel .

  11. #8
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    Quote Originally Posted by MINENAZ16 View Post
    These shells look like mockup
    Surely not...

    Someone has decided to base their mock ups on the image second from right.
    Attached Images Attached Images

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