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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).
Note detailing Mr Royce's opinions on the potential causes of 'Coronation Vibrations' in engines.

Identifier  ExFiles\Box 25\3\  Scan050
Date  22th April 1912
  
Ref. Mr Royce's note on M1C/95212.

Re Coronation Vibrations.

TBB4/1.22412.

Members of the 22.4.12.
Tech. Committee

With reference to the suggestion that coronation vibrations are due to the uneven turning moment of the engine, Mr Royce says :-

"This seems a very slight amount but enough."

With reference to the lack of alignment of the clutch coupling affecting the coronation vibrations, Mr Royce says:-

"These also seem very small, but even this amount of unevenness is fatal."

[Handwritten note in left margin, vertical]
x634

[Handwritten note in left margin, diagonal]
T.C.
Engine Vibration.

[Printed text at bottom left]
W.S.T.M. 5000 3-12 H & S LD.

[Printed number at bottom right]
23
  
  


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