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).
Issues with contact point alignment and noise on the S.U. Twin Petrol Pump.
| Identifier | ExFiles\Box 27a\2\ Scan249 | |
| Date | 22th September 1933 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X2677 22.9.33. S.U. TWIN PETROL PUMP. (1) The contact points on the above pumps are badly out of alignment and after very little time will corrode and burn away on one edge. I have shewn Mr.Elliott this and he is writing the S.U. Co. re same. (2) A large percentage of the noise created by the pumps is due to the fact that on the return of the toggle mechanism the brass bridge piece strikes hard against the Bakelite end piece; this is acting as a sound plate. The noise can be stopped by putting slight pressure on the plate. The portion which the bridge piece strikes is in no way supported, having mentioned this to Mr.Elliott, he suggests that the S.U. Co. fit a stud through the end piece into the body. J.C.Bowering. | ||