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).
Tests concerning a Wraith carburetter insulation washer and engine mounting flooding issues.
Identifier | ExFiles\Box 7\4\ X 608 Carburetter-page24 | |
Date | 7th May 1938 | |
To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe} Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe}2/MH.{M. Huckerby}7.5.38. WRAITH CARBURETTER - INSULATION WASHER. Tests carried out with the above insulation washer show no improvement in starting when hot. Temperatures recorded show that the maximum difference is 14°C after 7 minutes and 11°C after 15 mins. Please find graph attached. We therefore conclude that with no practical value the insulating washer is not required. Engine Mounting - Flooding. 24.G.VI. Flooding can be produced on this car by turning the engine on the starter motor with the engine mounting adjusted to give the worst period and the battery charged up, but without ignition. A spring fitted to the float with correct tension shows improvement. Without the spring, battery down a little and the level lowered to .750" no serious flooding occurs. It is understood that the engine mounting on this car is not standard Recommendation at the moment is .750" fuel level. 25.G.VI. This mounting is understood to be nearer standard. With fuel level at .750" no trouble experienced. WXA.1 Sg{Arthur F. Sidgreaves - MD}'s car. Reported satisfactory with .750" level. WXA.2 Hs{Lord Ernest Hives - Chair}'s car. Fuel level .625" standard. Reported that idling is occasionally poor and lumpy, corrects itself and is again satisfactory. This fuel level will be reduced to .750" at the first opportunity. | ||