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).
Experiments on the Overhead Camshaft Bentley engine, focusing on silencing rather than thermodynamics.
| Identifier | ExFiles\Box 82\4\ scan0397 | |
| Date | 14th October 1936 | |
| Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} E.1/HP.14.10.36. x200 Rm{William Robotham - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} Wer. E/INR. E/PSN. Overhead Camshaft Bentley. We do not want to do a lot of work on the thermodynamic side in connection with this engine before it goes into a chassis. The major object of this experiment is to tell us whether the overhead camshaft and drive can be brought to a sufficiently good standard of silence, and we can only judge of this with the engine in a complete car. Our view, therefore, is that our present efforts should be directed towards whatever is necessary for this purpose, and to improve the cylinder head joint we have issued a drawing of a modified gasket. We now know from the valve gear covers we are using on Phantom III that the method of fixing employed on the overhead Bentley cylinder is not the best, and this would suggest carrying out some sound insulation experiments when we have this engine on the road. E.{Mr Elliott - Chief Engineer} [Signature] | ||