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).
Engine performance adjustments, detailing effects on speed, temperature, detonation, and consumption.
| Identifier | ExFiles\Box 160\3\ scan0171 | |
| Date | 1st September 1940 | |
| ( 3 ) This indicates greater freedom of the engine being responsible for lower oil temperature rather than any ventilation. The cut-out plate removed only gives an increase of 2.1/2 KPH. Cold air intake without silencer gives an increase of 3 KPH. so far. A little more may be gained by more accurate carburation. Detonation occurs only at low speed on the return to Depot. Nickle corrujoint gasket O.K. not disturbed. Water temperature varies of course at low speeds with drilled valve but is an improvement for keeping detonation down. Thermostat with lower opening temperature required with this radiator, drilled valve is satisfactory for track work. Less loss of water noticed with pressure valve now fitted to radiator. Oil consumption still very good. ----------- Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe} Rm{William Robotham - Chief Engineer} /9/40. | ||