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).
Fuel consumption tests and the value of suction ignition advance on the Wraith and 25/30 models.
| Identifier | ExFiles\Box 147\5\ scan0150 | |
| Date | 31th May 1938 | |
| 1249 By.{R.W. Bailey - Chief Engineer} from Rm.{William Robotham - Chief Engineer} c. Da.{Bernard Day - Chassis Design} c. Mx.{John H Maddocks - Chief Proving Officer} Rm{William Robotham - Chief Engineer}4/R.31.5.38. Attached is a report on some fuel consumption tests carried out by Ratcliffe. This shows that the suction ignition advance is not of much value on the Wraith as arranged for production. There is something curious about these results, because the 25/30 has benefitted considerably by the suction ignition advance. We are continuing these tests, but are taking up the attitude that for our products it is far more important to have perfect carburation and an instantaneous get-away than maximum economy. Hm.{Capt. W. Hallam - Head Repairs} | ||