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 co-efficient of friction against temperature for Duron servo linings.
| Identifier | ExFiles\Box 141\1\ scan0016 | |
| Date | 22th February 1935 | |
| DURON SERVO LININGS. CO-EFFICIENT OF FRICTION TEMPERATURE. - DEGREES.F. DISINTEGRATED COMPLETELY HERE G.55679. 1ST RUN G.5579. 3RD. RUN 45% DECREASE IN OUTPUT 22.2.35 | ||