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).
Suggesting a cooler for the ignition oil relay to prevent damage from high temperatures during bench tests.
| Identifier | ExFiles\Box 65\1\ scan0095 | |
| Date | 18th March 1925 | |
| To Mx.{John H Maddocks - Chief Proving Officer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X8685 Hs{Lord Ernest Hives - Chair}/Rml/LG18.3.25. IGNITION OIL RELAY. We find that the temperature attained by the engine oil during prolonged dynamometer or bench tests is very considerably in excess of that which may be expected on the road. The cup leather in the oil relay is highly susceptible to excessive temperature and may become completely perished unless precautions are taken to ensure that the relay is supplied with oil at a reasonably low temperature. We therefore suggest that some form of cooler is inserted in the supply to the oil relay which will maintain the supply of lubricant at a temperature below 65ºC during dynamometer and bench tests. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||