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).
Outlining proposed tests to investigate the phenomenon of engine 'running after switching off'.
| Identifier | ExFiles\Box 159\5\ scan0027 | |
| Date | 4th June 1940 | |
| C O P Y. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} and Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} from: Rm.{William Robotham - Chief Engineer} RUNNING AFTER SWITCHING OFF. ----------------------- While Whyman is making a comparison of the two types of cylinder head for detonation, roughness, etc., we think it is an excellent opportunity to confirm results on the test bed for running after switching off. We should like to know the effect of the following variations on this phenomenon:- 1. Combustion chamber shape. 2. Water temperature. 3. Compression ratio. 4. Type of fuel. 5. Ignition advance. 6. Mixture Strength. 7. Flush crown pistons. These tests can be carried out on whatever car is used to compare the two cylinder heads. At the same time, it would be interesting to find an ex-planation as to why 11.B.V. and 30.G.7. seem to be so free from this trouble. We suggest that Caisley might work with Whyman and start by writing his test bed report. Rm.{William Robotham - Chief Engineer} | ||