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).
Report analysing lost pedal movement in a rear braking system, including a table of deflection measurements and a blueprint of the linkage.
| Identifier | ExFiles\Box 15\2\ Scan007 | |
| Date | 28th January 1927 guessed | |
| contd :- -2- surprising but is substantially borne out in practice. The simplest method of overcoming the difficulty is to reduce the direct rear braking, but this is already less than on EAC.111. We hope to be able to effect a considerable temporary improvement by shrinking a steel band on the rear drums. If the subsequent amount of lost pedal movement is still excessive, we propose to analyse the linkage with a view to ascertaining where the max. deflection takes place. LOST PEDAL MOVEMENT - FOOT PRESSURE EXERTED 156 LBS. | Rear brake drum distortion. | Defln: rear axle shafts shoes etc. twist. | Rear spring twist. | Pedal linkage to axle. | Shoe clce: .020" servo clce. | Total. | Available pedal travel. | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | .93 | .77 | .400 | .700 | 1.23 | 4.03 | 5.00" | (a) Distortion in rear axle brake linkage. [Blueprint Diagram Labels] E.A.C. 7 40/50 P contd .. | ||