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).
Investigation into cold starting trouble and engine misfiring related to PIII valves and fittings.
| Identifier | ExFiles\Box 96\2\ scan0184 | |
| Date | 11th December 1936 | |
| To: RM.{William Robotham - Chief Engineer} PIII Valves and Fittings Cold Starting Trouble. 11/12/36 The first 6 rockers on B side Cyl. Head on 37EX Car were fitted with RM{William Robotham - Chief Engineer}267 bushes, the remaining rockers were assembled as standard. After the Car had been left out for a night in the frost, the engine was started. It misfired slightly but soon became normal. The RM{William Robotham - Chief Engineer}267 bushes gave no trouble on the engine. The reason the misfiring was not so severe as on the previous day - might be put down to fact that the rocker mechanism had been dismantled and cleaned, and the bushes put back in a different position. It was noted that on 37EX Car all the rockers, bushes, and eccentrics had worn oval and that the bushes were working in one position only. A different position of such a bush would alter the working characteristics of the rocker & the eccentrics. | ||