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).
Noisy tappet gear on engine 9-B-V and proposed tests to find a solution.
| Identifier | ExFiles\Box 98\4\ scan0088 | |
| Date | 18th March 1939 | |
| Hood. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} from Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} Rm{William Robotham - Chief Engineer}2/R.18.3.39. The tappet gear on 9-B-V is still noisy when starting up from cold. It makes such a clatter that the wearing parts must be suffering. One assumes that the clatter must be due to some portion of the valve train. Tests should be carried out in the Cold Chamber applying an oil supply to the various portions of the tappet push rod and rocker until the source of the trouble is discovered. We should then like to decide what measures should be taken to put matters right. It is just possible that a relief valve,which allows the oil pressure to increase considerably when the oil is cold, may do the trick. Rm.{William Robotham - Chief Engineer} | ||