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).
Hand-drawn graph comparing frame stiffness and resonance against frequency and amplitude.

Identifier  ExFiles\Box 170\2\  img282
Date  3rd July 1935
  
Amplitude
A: original frame
B: first stiffening. much worse.
C: further stiffening. Equal to original.
D: improved frame.
Frequency
wheel hop frequency - 540 v/min
Frame Stiffness & Resonance
Olley July 3/35
  
  


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