Rolls-Royce Archives
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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).
Modification to the 20/25 HP fan to reduce noise and requesting its standardization.

Identifier  ExFiles\Box 104\3\  scan0216
Date  13th July 1933
  
X5220
To Br.{T. E. Bellringer - Repair Manager} from E/JNR.{Charles L. Jenner}
E/JNR.{Charles L. Jenner}8/HP.13.7.33.
c. Hs.{Lord Ernest Hives - Chair}
re 20/25/HP. Fan.
We send you herewith:
LeC.3570 showing the fan with the trailing edges of the tips cut away to a curved shape.
This has been proved to reduce the noise at high speed.
Will you please have this put in hand as soon as possible, with a view to early standardization.
E/JNR.{Charles L. Jenner}
  
  


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