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).
Parameters for Phantom III clutch testing.
| Identifier | ExFiles\Box 91\2\ scan0132 | |
| Date | 15th July 1937 | |
| P300d. RM{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} from Rm.{William Robotham - Chief Engineer} (Chateauroux). Rm{William Robotham - Chief Engineer}10/R.15.7.37. P.III CLUTCH. I think you should be reasonable in your P.III clutch tests. We do not want to get the clutch hotter than it would become in the hands of a normal owner. The main object of my remarks to you was to ensure that the clutch did get some work over and above the tests to which it is subjected by driving at high speeds. Rm.{William Robotham - Chief Engineer} | ||