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).
Proposed work and further experiments on the Wraith rear dampers.
| Identifier | ExFiles\Box 9\8\ 08-page45 | |
| Date | 19th May 1938 | |
| -3- Rm{William Robotham - Chief Engineer}/D.D.Clapham.7/WH.19.5.38. 29.G.VI - Cont'd.{John DeLooze - Company Secretary} not been proved yet, there having been several failures on the bump. PROPOSED WORK ON WRAITH. We propose to try as soon as possible a pair of rear dampers having an .080" dia. hole in the lower part of the bump piston where the replenishing valve normally is, and do away with one replenishing valve. We hope that this will eliminate free movement in the damper because the jet of oil from the leak hole in the piston is directed at the replenishing valve in the other piston. (This scheme has already been tried on B.III with success). If the ride which results is acceptable then we will thoroughly test and standardize this damper. It will be slightly cheaper than the existing. As a further experiment we will try a leak hole in the cylinder wall in such a position that the piston will cover it after a certain movement (about 1 1/2" of bump wheel movement) has occurred. Rm{William Robotham - Chief Engineer}/DD.Clapham. | ||