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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Confirming a 'Discol' fuel experiment eliminated detonation noise and arranging for a car to be sent to Derby.

Identifier  ExFiles\Box 109\5\  scan0140
Date  11th July 1939
  
S/W

664

To Rm.{William Robotham - Chief Engineer} from Sg.{Arthur F. Sidgreaves - MD} re WMB-11 Sg{Arthur F. Sidgreaves - MD}9/E17739

Referring to Rm.{William Robotham - Chief Engineer}6/MH.{M. Huckerby}11.7.39 confirming conversation this morning, I tried the Discol experiment and the noise disappeared entirely. This evidently means that it was detonation.

As arranged on the telephone I am sending Kennett with the car to Derby to-day and should be glad if you would see that I am notified not later than Thursday as to when I can have it back.

Sg.{Arthur F. Sidgreaves - MD}
  
  


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