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).
High radiator temperature on car 28-EX, questioning test conditions and the potential role of a radiator filter.
| Identifier | ExFiles\Box 11\3\ 03-page069 | |
| Date | 1st May 1930 | |
| Hs{Lord Ernest Hives - Chair} X7940. To Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} from Sg.{Arthur F. Sidgreaves - MD} re 28-EX. 10,000 Miles Report. Sg{Arthur F. Sidgreaves - MD}4/E1.5.30 Referring to Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}S/MJ.30.4.30 in suggesting that the high radiator temperature complained of may be due to the radiator filter causing restriction in the water circulation, have you in mind that the report of the day before stated that the radiator had been cleared out? You also mentioned that previous 10,000 miles tests on Phantom II have indicated that with the standard system we are not under-cooled, but is it not a fact that all former 10,000 mile tests were carried out more or less in the depth of winter and that Sunday last the 27th. ult. the day of the report was an unusually warm day in this country and highly probably was extra warm in France, the average air temperature on the report being given as 22.3°C. whereas that of the day before was 18.2°C. It seems to me, therefore, that we ought to investigate this matter and watch the points carefully because it may be that this test is bringing to light a trouble which was not previously known about, and it may also be that the thermostatic shutter control fitted to this car is not permitting the radiator shutters to open fully. I gather from a former memo. that it is not proposed to standardise the filter because recent modifications to the spaces for the water circulation have, you believe, rendered the filter unnecessary. Such being the case, would it not be advisable for the filter to be removed so that we obtain a test under the conditions which will eventually prevail? Sg.{Arthur F. Sidgreaves - MD} | ||