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).
Recommending the use of felt pellets over new valve wedges based on rig testing results.
| Identifier | ExFiles\Box 96\2\ scan0215 | |
| Date | 24th March 1937 | |
| 354 To HPS.{Horace Percy Smith - Experimental Factory Mgr} Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}18/JH.24.3.37. Re Valve Wedges for P.III to LeC.5495. ✓ We have tested two of these valve wedges on our rig and so far as we could tell they were quite efficient, we cannot tell on the rig however what effect suction may have. We have tested the felt pellets and their effect on oil consumption, and find that the use of these is quite as effective, i.e. no increase in consumption when fitted. As the use of felt pellets can be adapted to the present cars in service, and would be so much cheaper we recommend using these to the new valve wedges. Rm{William Robotham - Chief Engineer}/F.Dodd. | ||