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).
Modifying the Phantom III Carburetter union body by increasing its bore size for improved petrol flow.
| Identifier | ExFiles\Box 93\2\ scan0150 | |
| Date | 9th March 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} Copy to EY. Eg. Ha/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Swindell. X308 STANDARD Phantom III Carburetter. ----------------------- We should be pleased if you would open out the smaller bore of the union body issued experimentally under RS.{Sir Henry Royce's Secretary}273, and for production under detail E.88032, from .201" diameter to .265" diameter. Experiment has shown that this increase is necessary to obtain the required maximum petrol flow. The Americans are able to use a smaller bore than is possible with our pump because their petrol is supplied under a pressure of 3 lbs. per sq.inch, as compared with the 2 lbs. per sq.inch which our pump delivers. E/PSN. | ||