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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).
Tests on brake friction, referencing an attached chart from Ferodo.

Identifier  ExFiles\Box 26\4\  Scan243
Date  2nd February 1924
  
To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair}
c. to CJ. RG.{Mr Rowledge}
c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design}
c. to BY.{R.W. Bailey - Chief Engineer}

X719
V8009

Hs{Lord Ernest Hives - Chair}3/LG14.2.24.

Tests are in progress to obtain reliable results on actual brakes between friction at rest and sliding.

We attach chart which we have obtained from Messrs. Ferodo which gives the figure for this.

Hs.{Lord Ernest Hives - Chair}
  
  


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