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).
Solutions for overheating rear brake drums and proposing trials of new materials and designs.
| Identifier | ExFiles\Box 26\4\ Scan011 | |
| Date | 3rd July 1914 guessed | |
| Wer/Hy{Tom Haldenby - Plant Engineer}12/L2714. Sheet. 2 Another way out of the trouble may be by the use of die pressed Ferodo. We have some on order and as soon as it is obtained we will immediately make tests with it. It is being hurried along. After a very severe test these rear foot brakes get very hot and sometimes rub when released, causing a noise each revolution of the drums. This is due to the drum getting out of truth with the heat. I think it would be a good thing to try a pair of drums with a series of thin radiating ribs turned on the outside. This would keep the brake cooler and would also stiffen the drum considerably. We may be able to return to the original thinner drum if we put the radiating ribs on. Many other makers do this and I believe we should benefit by giving the scheme a trial. I would also like to try a pair of rear foot brakes made much wider than the present ones. I think this would be a distinct improvement. Hy.{Tom Haldenby - Plant Engineer} | ||