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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).
Letter concerning the low tensile strength of iron castings and comparing engine test bed conditions to on-road conditions.

Identifier  ExFiles\Box 130\3\  scan0097
Date  30th June 1939
  
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Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}17/JH.

30th. June, 1939.

If as we fear, the iron turns out to be of low tensile, we would be glad to know if you are able to trace whether or not both came from the same batch of castings, and also whether many others of the same batch have been supplied to us.

We cannot visualise any condition prevailing which renders the conditions of the engine test bed any more severe than on the road, in fact, there is always the possibility of higher revs. being attained on the gears, or on a down gradient.

Yours faithfully,
FOR ROLLS-ROYCE LTD.
  
  


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