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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).
Modifications to the brake leverages for B.111 and B.50 chassis.

Identifier  ExFiles\Box 121\1\  scan0049
Date  20th September 1938
  
BY/MS.
c. Rm.{William Robotham - Chief Engineer}
---/May.

1029
DA.{Bernard Day - Chassis Design}13/G.20.9.38.
A.F. MARTINDALE

B.111 and B.50. CHASSIS.

Please receive herewith :-

PD.265 Modified Brake Leverages.

This scheme has been done in accordance
with memos Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}3/MH.{M. Huckerby}5.9.38. Items 3, 6 and 7, and
Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}3/MH.{M. Huckerby}30.8.38. Item 2.

Various levers have been modified to provide
for 10% extra travel in the linkage to allow for carrier
plate deflection and other sponge. The servo and its
libkage remains unchanged, the extra travel being
accommodated elsewhere.

The servo cam levers are now in line in the
'off' position, and are not provided with stops, the special
headed pins being replaced by standard ones. The reason
for this is to improve the clearances between the jaws and
the levers.

The pedal plate travel is now 4.500 inches as
against 4.000 inches previously.

The hand brake leverage is indicated as 70 : 1
and havinga travel of 9.750 inches at the hand lever knob.
A drawing showing a modified quadrant will follow shortly.

DA.{Bernard Day - Chassis Design}
  
  


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