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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).
Test results for Ferodo brake material without brass wire, noting a lower co-efficient of friction.

Identifier  ExFiles\Box 32\2\  Scan022
Date  3rd March 1921
  
X 3458
To BY.{R.W. Bailey - Chief Engineer} from Hs.{Lord Ernest Hives - Chair}
Hsl/LG2. 3. 21.
X 3422 FERODO FOR Your REAR BRAKES. X.3458
With reference to the Ferodo material for the rear brakes without the brass wire, we have lately been carrying out further tests with this material. Our opinion is that it has a lower co-efficient of friction than the wire woven material.
We recommend that before we fit any of this material, we write to the Ferodo people and tell them what our opinion is and ask them whether they agree with it.
Hs.{Lord Ernest Hives - Chair}
  
  


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