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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).
Requesting instructions for two drive configurations for a Torsional Indicator on a Wraith III to investigate camwheel wear.

Identifier  ExFiles\Box 108\2\  scan0083
Date  2nd May 1938
  
r 6007

URGENT.

To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}
c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}

Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/MH.{M. Huckerby}2.5.38.

TORSIONAL INDICATOR.

WRAITH III.

The results we have obtained with the above are so informative that we have decided to further its application in an endeavour to find the origin of the wear on the Fabroil camwheel as per Wraith 15,000 miles unit.

Will you please instruct for two drives to be made on which to drive the indicator Ex.27856 as follows :-

(1) Drive off fan pulley unit which will record what oscillations are getting through the spring drive.

(2) Drive to be taken off cam wheel.

Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}
  
  


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