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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).
Extract discussing issues with Ferodo material supplied for shock dampers, attributing the problem to water absorption.

Identifier  ExFiles\Box 78\2\  scan0339
Date  24th January 1921
  
x.3461b

To Hs.{Lord Ernest Hives - Chair}
To EP.{G. Eric Platford - Chief Quality Engineer}
c. R.R. of America Inc.) from R.{Sir Henry Royce} Extract from R2/G24.1.21.

X.3439. RE CLUTCHES. X.3483.
X.870.
X.3409.

X.3461b. The same may be said of the Ferodo supplied for shock dampers.* It spoiled our rear shock dampers,* being worse than lubricated metal to metal.

R.{Sir Henry Royce}

*Just recently concluded that it may be possible that the water or damp has got inside and caused the ferodo to swell and jam. be sure the clearance are sufficient.
  
  


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