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 in inches against miles driven in London traffic.
| Identifier | ExFiles\Box 130\2\ scan0360 | |
| Date | 7th December 1936 | |
| 3JEX. 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 1.2 .8 .6 .4 .2 O 1000 2000 3000 4000 | ||