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 showing the coefficient of friction versus temperature for S3 0.3% carbon steel.
| Identifier | ExFiles\Box 85\1\ scan0035 | |
| Date | 14th January 1936 guessed | |
| COEFFICIENT OF FRICTION 0·5 0·4 0·3 0·2 0·1 0 100 200 300 Disc S3 0·3% CARBON STEEL. TEMPERATURE DEG. C. 100°C. - 200°c. 100°C. - 260°c. 100°C. - 300°c. | ||