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).
The coefficient of friction and servo pressure for front brakes.

Identifier  ExFiles\Box 26\4\  Scan226
Date  17th January 1924 guessed
  
contd:-
-3-
The co-efficient of friction determined from our front brake results, taking into account the wrapping action, is .427. Ferodo's said that this figure was quite reasonable.
Taking μ = .43 the EAC.lll. Servo would give an increase of pressure of approx. 16 to 1 against 17.5 to 1 determined experimentally.
Hs{Lord Ernest Hives - Chair}/ACLovsey.
  
  


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