John Breed, Diary and Training diary, item 153

• April 5, 2017 00:54:38 Cheryl Ellsworth

  Finding the Fuze.

       When the range has been found so that

  the mean trajectory passes through the target, the fuze

  has next to be found

  
  

   Drawing of shell explosions at various points 

  
  

  The corrector scale of the fuze indicator, when set at normal

  200, is intended to give a burst at the distance from the target

  which is most effective at each range. But the burning of

  fuzes varies according to the density of the air, the fuze

  burning fastest when the barometer is highest; and moreover

  the time taken by the shell to reach the target varies

  according to the strength of the powder which is increased

  by heat. Therefore it is necessary to try several settings

  of the corrector scale, and to select the best

  
  

  So far the B.C has been ranging with right section Nos 1

  and 2 guns. He has previously ordered the remaining

  guns to set their correctors at graduation

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