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).
Advantages of heat-treating brake shoes to prevent distortion.
| Identifier | ExFiles\Box 84\2\ scan0091 | |
| Date | 3rd February 1934 | |
| To Eg. and Wor.{Arthur Wormald - General Works Manager} from E.{Mr Elliott - Chief Engineer} c. Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} Hy.{Tom Haldenby - Plant Engineer} Ba. HDY.{William Hardy} GRY{Shadwell Grylls} see me X206 HR re Brake Shoes. We are pleased to see from Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}3/KW.5.2.34 that experiments confirm the advantage of heat-treating brake shoes so that the heating they subsequently receive in service has no effect leading to further permanent distortion. We proposed this at the Conference with Hn{F. C. Honeyman - Retail orders}, Hy{Tom Haldenby - Plant Engineer}, Rm.{William Robotham - Chief Engineer} and Br.{T. E. Bellringer - Repair Manager} (which was held to consider various chassis troubles including brake seizures) as a result of observations on the behaviour of aluminium pistons during the running in of engines, at which time pistons automatically undergo a sort of controlled heat-treatment. In the case of the pistons it is impracticable to reproduce the heating effect obtained in the engine and hence the importance of having a correctly arranged running in schedule. There is no doubt that all aluminium pieces which are subjected to heating in carrying out their service functions require consideration from this point of view, and pre-heat-treatment where possible as in the case of brake shoes wherein we are able to reproduce almost exactly service conditions. E.{Mr Elliott - Chief Engineer} | ||