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).
Design modifications for a plunger and damper system based on sketch Rm.344.
| Identifier | ExFiles\Box 152\1\ scan0271 | |
| Date | 25th March 1937 | |
| -2- The enclosed sketch Rm.{William Robotham - Chief Engineer}344 seems promising. The reduced effective area of the top plunger is necessary to :- (1) Reduce load on the rod control (2) Allow the plunger to be locked hydraulically (3) Reduce the wear of the plunger on the shaft, thus avoiding harnening the shaft. If you think that this suggestion looks to be satisfactory we should like you to build up a set of 4 dampers if possible incorporating (1) Bronze bushes for the shaft. (2) Small diameter shaft. (3) Detachable inter-mediate lever. I think we may have trouble from the top plunger when locked scoring the casing. We find that cast iron brushes are satisfactory for these locking units. It might save a lot of time to start off with a cast iron bush for the top plunger. We have had a long delay with bumping your dampers, however at the present moment they are receiving some more hours. In order to make as rapid progress as possible I think it will be best at first to make the dampers slightly more expensive than necessary. Yours sincerely, | ||