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).
List of points regarding the Phantom III and Wraith models, including idling speed modifications.
| Identifier | ExFiles\Box 161a\2\ scan0152 | |
| Date | 18th February 1938 | |
| PHANTOM III - 2 - 5. Wraith wheel movement - reference RHC{R. H. Coverley - Production Engineer}6/MJ18.2.38 6. Open type fuse for customers' complaints- ref.RHC{R. H. Coverley - Production Engineer}6/MJ18.2.38 7. Larger carburetter jets - reference RHC{R. H. Coverley - Production Engineer}6/MJ18.2.38 8. Idling S. have no adverse criticisms whatever to make of the increased idling speed to 350 revs. as the result of the cars in London fitted with this modification. S. note however that Rm{William Robotham - Chief Engineer} states it will mean reverting to the original large jets instead of the smaller ones just standardised. Does this mean an increase in fuel consumption? Recommendation required from MX{John H Maddocks - Chief Proving Officer} & Rm.{William Robotham - Chief Engineer} | ||