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).
Letter from Ferodo Limited concerning the difficulty of measuring the true temperature of brake linings and drums when one material is non-metallic.
| Identifier | ExFiles\Box 121\1\ scan0320 | |
| Date | 20th September 1940 guessed | |
| FERODO LTD TECHNICAL DEPT. - 3 - reasonable to state that lining and drum temperature will be a maximum at this point. Unfortunately as we have already stated, while two dissimilar metals sliding on one another can also function as the hot junction of a thermo-couple, this is not possible where one of the two materials is a non-metallic product, and we have yet to hear of any other method by which the true temperature of lining and drum can be measured. Yours faithfully, FERODO LIMITED. W.E. Shilton Manager. Technical Department. .O.T.T | ||