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).
Test procedures for oil consumption and Bentley detonations.
| Identifier | ExFiles\Box 144\3\ scan0146 | |
| Date | 19th January 1937 | |
| To Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 33-EX. OIL CONSUMPTION Will you please carry out oil consumptions on the above car under the following conditions. Consumption at average speeds of 25 MPH. and 50 MPH., to be repeated under each condition in order to obtain true figure. (a) With oil feeding the valve tip as standard. (b) With the oil holes in the valve end of rockers sweated up but retaining the existing bottom grummets. (c) As (b) with new bottom grummet. (d) After above tests on Castrol XL. compare a run with "Mobiloil Arctic" Records of oil temp. and pressure to be checked during the runs. From the results we can say what further tests are to be carried out. ---------------- BENTLEY DETONATIONS. B.23.AE. (a) Running on Ethyl with the existing deturbulated head compare performance and detonation with the existing Delco against std. RR. Bentley governor. (Std. setting.) (b) Running on Shell No.1, compare with (a) for detonations and performance. Can the ignition be retarded without appreciable loss of performance to cut out detonations? (c) Remove the head and check the capacity. This should be 119.cc. -6.4:1 Insert another gasket (Corrujoint .030" thick) will bring the compression ratio to 6.2:1. Check for detonations at the best performance with Shell No.1. and what the performance is when the ignition is retarded sufficiently to cut out detonations. continued. | ||