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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).
Excessive pedal travel on 20/25 brakes and a proposed solution.

Identifier  ExFiles\Box 102\3\  scan0099
Date  22th September 1933
  
X5360

To Hd.{Mr Hayward/Mr Huddy} from Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}

Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}4/KT.22.9.33.

20/25 BRAKES.

We have examined one or two cars in the Test Dept. with the rear brakes set at 1.00" clearance. The gap in the star springs had been reduced to .040" by use of washers G.56019/20/21. The pedal moved 2" to take up all the clearance, and has then a further 1 3/4" before hitting the boards.

We think it is likely that considerable pedal travel is being lost on cars previous to GYZ.28 due to the gap in the star springs being excessive. Movement there is multiplied 8 times at the pedal. We suggest fitting the adjusting washer in those cases.

Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}
  
  


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