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).
Graph plotting the loss of clutch pedal travel against miles driven to measure wear during London traffic running.
| Identifier | ExFiles\Box 93\3\ scan0226 | |
| Date | 7th December 1936 | |
| 35EX1: WEAR OF CLUTCH DURING LONDON TRAFFIC RUNNING 16-10-36 to 7-12-36 (MAX LOSS OF PEDAL TRAVEL PRACTICABLE BETWEEN ADJUSTMENTS IS 0.7 INCHES) LOSS OF PEDAL TRAVEL IN INCHES MILES | ||