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).
Secret memo discussing a potential change in the brake servo design, from the RRM scheme to a direct foot pressure system for all four brakes.

Identifier  ExFiles\Box 73\1\  scan0158
Date  1st May 1924
  
X.9910 X9910

To RG.{Mr Rowledge} & HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} S E C R E T. R2/M3. 5. 24.

E.A.C. - SERVO X.9910

When I asked you for RRM. with DES.60 I concluded that from your and Mr. Elliott's memo. there was no doubt that the RRM. scheme was the best and most likely to be the favourite.

Your latest memo. indicates that this may be doubtful, that we may adopt the direct foot pressure to all the four brakes as well as the servo to all four brakes, instead of the RRM. scheme of the foot pressure going to the rear brakes only. If this is so I think it as well to bring a car here fitted with this scheme, or one that can easily be modified in the garage here.

R.{Sir Henry Royce}
  
  


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