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).
Meeting notes page discussing issues with servo drums, 3.5-litre engine bore wear, quick steam valves, and flush top pistons.
| Identifier | ExFiles\Box 174\3\ img303 | |
| Date | 11th July 1941 | |
| Cont'd.{John DeLooze - Company Secretary} -3- Rm.{William Robotham - Chief Engineer}1/WL.11.7.41. still in progress, so though the results have been achieved, the reason why progress had been made was still somewhat obscure. It was hoped that at the next meeting, some more logical explanation would be forthcoming. 5. Servo drums. This very persistent complaint was one of the few outstanding defects on standard B.V. in customer's hands which had not been eliminated. Rm.{William Robotham - Chief Engineer} recommended that we should at least try the star spring on the servo which has served us so well in the past, before we introduce further inventions. 6. Bore Wear 3.5 litre Engines. The figures obtained on I.R.1 and 12.B.V. indicate that the 3.5 litre engines are wearing their cylinder bores more rapidly than the 4.5 litre engines. The consumption on 12.B.V. was already falling rapidly in less than 40,000 miles and I.R.1 had something like .008 wear in 15,000 miles. Both these engines have dry liners and replacements are in existence. We know that the trouble can be improved by chromium plating, but one engine would be devoted to finding out whether lubrication is the cause of the trouble. The engines will not be dismantled until the oil consumption is so bad that they cease to operate satisfactorily. Rm.{William Robotham - Chief Engineer} and Rm{William Robotham - Chief Engineer}/ORD. will decide to what specification they shall be re-built. 7. Quick Steam Valve. Collier will carry out experiments to determine the reliability of this fitting. 8. Flush Top Pistons. It was emphasised that flush top pistons had shown a definite improvement in eliminating detonation. Owing to having to fit oversize pistons to some of the B.60's, few flush top pistons were running. It was emphasised that all new engines should be build with flush top pistons if possible. -Continued- | ||