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 variation of friction with temperature for Ferodo RAD 13 friction material across three test runs.
| Identifier | ExFiles\Box 87\5\ scan0035 | |
| Date | 2nd October 1934 | |
| FERODO RAD 13 FRICTION MATERIAL VARIATION OF FRICTION WITH TEMPERATURE FIGURES TAKEN ON 25 HP SERVO MOTOR DRUM SPEED 44rpm. END LOAD 790 lbs. COEFF. OF FRICTION TEMPERATURE °F 3rd. Run 1st. Run 2nd. Run H39/2/10/34 AK | ||