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 to Ferodos Ltd. inquiring about the effects of temperature on brake lining wear.
| Identifier | ExFiles\Box 141\2\ scan0339 | |
| Date | 16th September 1940 | |
| J/80 Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby}3/ET. FERODOS Ltd., Chapel-en-le Frith, Stockport. 16th September 1940. For the attention of Mr. Longley. Dear Sirs, We are very interested in the effects of temperature on brake lining wear, and we are hoping that you will be able to help us in this respect. There are three main points which we are anxious to clear up: 1. How does wear vary with normal temperatures, below say 220° C? For instance would there be a very noticeable difference between wear at 100° C. and at 200° C.? 2. Would this difference, if any, be more marked if the linings were first overheated up to 300° C.? 3. We gather that it is possible for the leading shoe lining surface to reach higher temperatures than on the trailing lining. If the leading shoe is allowed to wrap, is it common for the leading portion to become noticeably hotter than the trailing end? Presumably the speed of the drum will have a big effect on the heat transference, a certain critical speed giving the best temperature equalisation to the linings. We shall be very grateful for your views on these questions. We should also like to know if you have got anything new in the non-squeak temperature-resisting line. Yours faithfully, | ||