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).
Report discussing crankcase oil dilution, the 'Dorris scheme', the Goshawk 11 car, and production issues.
| Identifier | ExFiles\Box 75\2\ scan0270 | |
| Date | 20th September 1921 | |
| contd:- -2- 20.9.21. We have not been able to measure any crankcase dilution. By-the-way, what scheme do you use for measuring the amount of dilution in the oil? We have tried several ways but have now decided that the viscosity test is the most reliable. We keep a sample of the oil which is put into the crankcase and compare it with the sample which is taken out. I believe that the viscosity test is recognised as one of the best tests because it is very difficult to separate out of the oil any of the heavy ends of gasoline. I would recommend that you try the weirs we described in a previous report. They do not cause any drop in power and it certainly improves the efficiency of the Dorris scheme. We have had Goshawk 11. car on the road; for the first start it is not so bad. I think there is no doubt that this model with the usual number of alterations, will be put into production. I would like to hear from you how R-R Springfield stand. I get people coming to see me with very cheerful(?) faces telling me that you have "shut up" and "broke". We, of course, are right down to the bone. We are practically only producing chassis as orders are received. We came into one trouble with the Dorris scheme which by looking at the arrgt. XA.1096, you may experience we find it is very necessary there should be a continuous fall in the pipes to the boilers. If the petrol is trapped in the pipes so that the pressures cannot be balanced, it will be held up and not run down. Yours very sincerely, Hs.{Lord Ernest Hives - Chair} [Watermark: DICKINSON BOND 1804] [Footer: R.R.235A (50T. S.H.980. 19-2-G) (1-2-G) G.S.3008] | ||