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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).
Comparative table of clutch and pedal movement details for Hispano, E.A.C., and 20 HP models.

Identifier  ExFiles\Box 68\1\  scan0334
Date  6th February 1925
  
CLUTCH AND PEDAL MOVEMENT DETAILS.

DETAILS. | Hispano. | E.A.C. | 20 HP.
Mean friction disc radius. | 5.91 | 5.95 | 4.72
Max. B.M.E.P. (lbs.sq.in.) | 112 | 105 | 90
Max. clutch torque (lbs.ft.) | 302 | 326 | 115
Spring load resisting (lbs.) | 2403 | 1900 | 960
Load at friction disc radius (lbs.) | 610 | 653 | 292
Conventional when slipping begins. | .125 | .170 | .152
Initial clutch pedal travel - (allowing for wear) | 5.1 | 3.1 | 2.6
Theoretically correct pedal pressure. | 23 lbs. | 38 lbs. | 44 lbs.
Initial max. plate movement possible. (eliminating elasticity in linkage). | .053* | .061* | .119*

Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}
  
  


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