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).
The fitting of a bijur oil supply, petrol pump issues, and an examination of different advance governors.
| Identifier | ExFiles\Box 101\2\ scan0128 | |
| Date | 24th October 1936 | |
| 509d HOTEL DE FRANCE, CHATEAUROUX, Indre. France. To. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. G.W.H. Files Swell - This seems rather rediculous. How did Waller get this governor. Rm.{William Robotham - Chief Engineer} 22. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} V.{VIENNA} We have completed the fitting of bijur oil supply to the rear brake shaft bearings. This took longer than we anticipated as it necessitated the removal of front and back carrier plates together with brake shoes. The job is satisfactory, and should present no future troubles. We noticed that the bearing in the outside carrier plate, which locates the cam end of the foot operated shaft, showed no vestage of lubrication at all, and we suggest that an "Oilite" bush might suitably lubricate this point. The petrol pump has been fitted to the frame side just rear of the brake equaliser shafts in the O.S. channel. We have stretched the springs by 1/4" in an attempt to get an adequate supply at speed, but find that even this extra set does not do the job, this may be partly due to the stifness of the diaphrams. We have therefore, fitted some old skin diaphrams we had, and have managed to increase the flow at the carburetters by 10 pts/hr. This however, is still not enough and we are temporarily putting the pump back on the dash, and suggest that you forward us higher rated springs or a special pump. We have detected a small puncture in one of the diaphrams due to one of the brass distance pieces being at one time trapped out of place. The hole developed when we removed the diaphram, and we are therefore trying to obtain two new ones from Paris. We have examined the advance governors on the three distributors we now have,(as there was some doubt as to the accuracy of the special governor supplied to Waller) i.e. As supplied by Swindell to Waller As supplied by Swindell to myself Standard as fitted to 22.G.V. The two special governors we understand, should be identically the same. We have found however, that the two special governors differ in that the spring on the one as supplied to Waller has 9 coils and takes 2.1/2 lbs direct pull on one weight to just bring them together, as shown in sketch, against 7 coils in the other and requires 3.1/2 lbs to bring the weights together. We have also checked up the standard governor and find it to be identical in every respect with the special one supplied to Waller. These differences would obviously effect the ignition advance characteristics in either case, and we would be interested to know which one is correct. We are continuing our tests with the turbulated head using the governor as supplied and brought over by myself last week. -------------------- GWH{George W. Hancock - Head Chateauroux}/HFH.{Hoppy F. Hamilton} | ||