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).
Modifications and issues with pumps, exhaust, mountings, and engine knock.
| Identifier | ExFiles\Box 82\1\ scan0159 | |
| Date | 1st August 1933 | |
| To Mr.Hancock, c/o Hotel de France, Chateauroux, Indre, FRANCE. To Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}6/KT.1.8.33. Thank you for your memo. of the 30th. We are seriously considering going back to the S.U. electric pumps. One great advantage is that there are two pumps instead of one and therefore you always get warning when you are likely to be in trouble. Another point is that the pumps will produce the maximum rate of work without the engine turning over at all. Anyhow if we do decide to go over to these pumps we will send you out the necessary pieces and piping. In the meantime we are very anxious that you should get some mileage to prove the engine modifications, brakes, and exhaust system. We are of course aware that the .160" gauge exhaust system XXXX sent to you is ridiculously heavy, but it is only a standby so that you can test the other parts of the car if you run into chronic exhaust system trouble. Actually the thin box with the altered end which Roberts took over is the one we want you to run. We want it criticising for tinniness because we anticipate that we shall have to lag it to get rid of this fault, and from what you say if we do this, it will have to be made in Staybright. We are also interested in the mounting, whether the new rubbers we sent out to you are any good, whether you still have to leave off the front end of the mounting, and whether if you do this the cut-out operations are affected. We have run into a bad knock which we find is due to the front engine mounting bush being unlubricated. It is the same sort of knock we used to get with the dry torque reaction dampers. It disappears with lubrication. We should like you to watch and see if you get it. So far we have only noticed it on the open Bentley. We note you remarks on the thermostat. The low temperature does not seem to coincide with | ||