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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).
Schematic diagram of the standard arrangement for four-wheel brakes on a 40-50 model, including modifications.

Identifier  ExFiles\Box 30\6\  Scan149
Date  1st January 1924 guessed
  
40-50 FOUR WHEEL BRAKES. STANDARD ARRANGEMENT. (SHEET 1).

DIFFERENTIAL / DISTRIBUTER
{ S/7 TORQUE TO FRONT
{ 2/7 " TO SERVO.

IN THE MODIFIED ARRANGEMENT
THE LEVERS A, B, C & D, HAVE BEEN
ALTERED AS FOLLOWS:—
A = 3.0
B = 1.25
C = 5.175.
D = 2.5.

Other Annotations & Dimensions:
.4 CAM RAD.
.5 CAM RAD.
4.5
2.8
3.3
3.25
2.15
14.75
6.77
2.275
3.05
2.715
2.75
3
2.25
7
P
T1
T2
A
B
C
D
  
  


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