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 comparing the temperatures of a brake drum and brake lining over time during continuous running.
| Identifier | ExFiles\Box 141\3\ scan0224 | |
| Date | 20th January 1933 | |
| FERODO LTD CHAPEL-EN-LE-FRITH. COMPARISON BETWEEN TEMPERATURES OF DRUM AND BRAKE LINING. DEGS. F MINS. CONTINUOUS RUNNING. BRAKE DRUM TEMPERATURE CURVE 2. CURVE 1. LINING. FERODO M.Z. 1/4" THICK. CURVE 1. TEMPERATURE BETWEEN INSIDE FACE OF LINING AND SHOE. " 2. TEMPERATURE TAKEN AT 1/16" FROM RUBBING FACE BY INSERTING THERMO COUPLE INTO THE LINING. RATE OF WORK 1 H.P. PER [square symbol]. SPECIFIC HEAT OF FERODO M.Z. - 0.244 DIAGRAM No 453 20/1/33 | ||