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).
Under-bonnet temperature readings and the design progress of a thermostatic unit for shutter control.
| Identifier | ExFiles\Box 92\6\ scan0277 | |
| Date | 12th November 1936 | |
| STEADMAN. 305. Rm.{William Robotham - Chief Engineer} --- c. Sg.{Arthur F. Sidgreaves - MD} Hs.{Lord Ernest Hives - Chair} Hives Rm{William Robotham - Chief Engineer}/STD E.6/HP.12.11.36. re Under Bonnet Temperature. -------------------------- It is interesting to note from Hancock's report on 35-EX dated 4.11.36, that with radiator shutters in operation the average water temperature was 77.5°C and maximum temperature reached in traffic blocks 90°C. With the shutters fixed permanently open the average temperature was 68.4°C, and the maximum reached in the worst traffic block was 80°C. The under bonnet temperature was not recorded but it does appear that there should be a clear gain in this respect for all except flat-out conditions, with the independent shutter control, even with the engine held to a water temperature of 75°C. We are finishing off the design of a double thermostatic unit applicable to the existing radiator for the independent shutter control scheme. The design will be finished within the next two or three days. E.{Mr Elliott - Chief Engineer} [Signature] | ||