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).
Premature wear and rattling of hydraulic damper bearings, proposing a material change to resolve the issue.
| Identifier | ExFiles\Box 131\4\ scan0038 | |
| Date | 3rd February 1937 | |
| X 1113 Rm{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} Cricklewood, 3rd February, 1937. Hydraulic Dampers. The question of the damper bearing will have to be tackled or we shall never be free from the complaint of rattles. It only needs .002" to .003" wear to cause rattles. The dampers are now being turned out with 100% bearings and the job is made as good as it is possible to make it, but wear takes place in the region of 15,000 miles, with the result of a complaint of rattles. The London trials Car 38-Ex is an example after 16,000 miles. The bearings had worn and have had to be changed. The load factor for the bearings is too high, there is no sign of shortage of lubrication so that can be eliminated. Is it not possible to have low carbon steel bearing case hardened that will stand up to the work. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||