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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).
Blueprint detailing modifications to a braking system, with associated calculations, distribution table, and performance graphs.

Identifier  ExFiles\Box 5\3\  03-page156
Date  11th June 1925 guessed
  
Top Left Section:
INDIA
MS4/LG 20525 AS MODIFIED BY N.Sch 2005 & DAI/M9625

Diagram Labels: DRUM DIA 13, CAM, DRUM DIA 14, .43 CAM

DIRECT REAR BRAKING: (13 / 4.25) x (1.187 / 1.350) x (2.000 / 3.150) x (6 / 2.3) x (2.5 / 4.3) x 1.4 P = 355 P.
SERVO REAR BRAKING: (5.12 / 4.38) x (1.187 / 1.350) x (1.850 / 1.750) x (4.875 / 3.000) x (2.150 / 3.150) x 213P = 249 S.P.
SERVO FRONT BRAKING: (5.12 / 4.35) x (1.187 / 1.350) x (1.850 / 1.750) x (4.875 / 3.00) x (2.15 / 2) x 145P = 266 S.P.

Table: DISTRIBUTION FOR VARIOUS SERVO EFFICIENCIES
Table Headers: SERVO TORQUE MULTIPLR, FOOT RATIO TO REAR, SERVO TO REAR, TOTAL TO REAR, SERVO TO FRONT, TOTAL BRAKING, % BRAKING FRONT, % BRAKING REAR
Row 1: 0, 355 P, 0, 355, 0, 355, 0, 100%
Row 2: .25, 355, 62.2, 417, 66.5, 483, 13.7, 86.3
Row 3: .5, 355, 124, 479, 133, 612, 21.6, 78.4
Row 4: .75, 355, 187, 542, 199, 741, 26.8, 73.2
Row 5: 1, 355, 249, 604, 266, 870, 30.6, 69.4
Row 6: 2, 355, 498, 853, 532, 1385, 38.5, 61.5
Row 7: 3, 355, 747, 1102, 798, 1900, 42, 58
Row 8: 4, 355, 996, 1351, 1064, 2415, 44, 56

Right Section (Graph):
INDIA
ORIGINAL BRAKE LEVERS AS IN MS4/LG20525.
ALTERED AS PER N.Sch 2005 & DAI/M9625

Y-Axis (Left): CONVENTIONAL BRAKING UNITS
Y-Axis (Right): % BRAKING
X-Axis: SERVO TORQUE MULTIPLR UNITS

Graph Lines: TOTAL BRAKING, % REAR BRAKING, TOTAL REAR BRAKING, TOTAL FRONT BRAKING, % FRONT BRAKING, SERVO TO FRONT, SERVO TO REAR.
  
  


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