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).
Squeaking rear spring, its lack of lubrication, and a query about leaf spring clearances.
| Identifier | ExFiles\Box 11\3\ 03-page070 | |
| Date | 4th May 1930 | |
| To: Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} From G.W.H. X7940 Hôtel de France, Châteauroux. 4/5/30. Re the rear springs. We remarked in our Daily Report of April 27th. that the off side rear spring was squeaking. We dismantled this spring during our examination of the car, and we found the front half of the spring practically no lubrication had got to the leaves, these were all in a rusty condition. We tried the bijur supply, and it was normal. We have not got another bijur to supply any greater amount of oil, therefore we have refitted the spring up and made sure that the bijur pipe line and everything is as O.K. as we can possibly make it, and left the spring as it was, so that if there is any improvement of the lubrication we shall be able to observe the result. We should like to ask whether there should be any distinct clearance between the tips of the leaves of these springs when the spring is not under load. We ask this because, when we took the spring off the car, we found that the third leaf of the front portion of the spring was not bedding on to the second leaf by .070". It gave us the impression that this leaf had taken up a permanent set. We are quite aware that there should be no nip on the spring leaves of this design of spring, but we are not aware that there should be any clearance at the tips of the springs. We send you a rough sketch of the two leaves, showing exactly what we mean. The same thing is at the rear portion, but the clearance is .034" instead of .070". There is a fair amount of clearance between the spring tie clips, more than what I have noticed on any other springs. We should be very | ||